/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_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:11:20,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:11:20,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:11:20,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:11:20,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:11:20,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:11:20,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:11:20,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:11:20,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:11:20,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:11:20,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:11:20,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:11:20,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:11:20,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:11:20,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:11:20,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:11:20,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:11:20,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:11:20,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:11:20,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:11:20,936 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 13:11:20,955 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:11:20,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:11:20,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:11:20,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:11:20,956 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:11:20,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:11:20,957 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:11:20,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:11:20,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:11:20,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:11:20,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:11:20,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:11:20,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:11:20,957 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:11:20,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:11:20,957 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:11:20,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:11:20,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:11:20,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:11:20,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:11:20,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:11:20,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:11:20,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:11:20,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:11:20,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:11:20,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:11:20,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:11:20,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:11:20,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:11:21,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:11:21,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:11:21,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:11:21,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:11:21,238 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:11:21,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2021-05-02 13:11:21,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14ceef5e5/f99d2528df2142a4b016f7386bb382bd/FLAG8de84dd62 [2021-05-02 13:11:21,713 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:11:21,715 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2021-05-02 13:11:21,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14ceef5e5/f99d2528df2142a4b016f7386bb382bd/FLAG8de84dd62 [2021-05-02 13:11:21,738 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14ceef5e5/f99d2528df2142a4b016f7386bb382bd [2021-05-02 13:11:21,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:11:21,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:11:21,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:11:21,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:11:21,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:11:21,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:11:21" (1/1) ... [2021-05-02 13:11:21,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42ef2c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:11:21, skipping insertion in model container [2021-05-02 13:11:21,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:11:21" (1/1) ... [2021-05-02 13:11:21,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:11:21,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:11:21,871 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_6.c[318,331] [2021-05-02 13:11:21,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:11:21,893 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:11:21,902 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_6.c[318,331] [2021-05-02 13:11:21,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:11:21,916 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:11:21,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:11:21 WrapperNode [2021-05-02 13:11:21,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:11:21,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:11:21,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:11:21,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:11:21,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:11:21" (1/1) ... [2021-05-02 13:11:21,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:11:21" (1/1) ... [2021-05-02 13:11:21,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:11:21" (1/1) ... [2021-05-02 13:11:21,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:11:21" (1/1) ... [2021-05-02 13:11:21,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:11:21" (1/1) ... [2021-05-02 13:11:21,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:11:21" (1/1) ... [2021-05-02 13:11:21,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:11:21" (1/1) ... [2021-05-02 13:11:21,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:11:21,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:11:21,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:11:21,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:11:21,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:11:21" (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 13:11:22,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:11:22,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:11:22,052 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:11:22,052 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:11:22,052 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:11:22,053 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:11:22,053 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:11:22,053 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:11:22,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:11:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:11:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:11:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:11:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:11:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:11:22,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:11:22,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:11:22,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:11:22,273 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:11:22,273 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:11:22,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:11:22 BoogieIcfgContainer [2021-05-02 13:11:22,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:11:22,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:11:22,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:11:22,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:11:22,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:11:21" (1/3) ... [2021-05-02 13:11:22,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d83c3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:11:22, skipping insertion in model container [2021-05-02 13:11:22,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:11:21" (2/3) ... [2021-05-02 13:11:22,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d83c3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:11:22, skipping insertion in model container [2021-05-02 13:11:22,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:11:22" (3/3) ... [2021-05-02 13:11:22,281 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2021-05-02 13:11:22,294 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:11:22,297 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:11:22,321 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:11:22,336 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:11:22,336 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:11:22,336 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:11:22,336 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:11:22,341 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:11:22,341 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:11:22,341 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:11:22,343 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:11:22,356 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 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 13:11:22,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:11:22,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:22,360 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:22,360 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:22,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:22,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1440262230, now seen corresponding path program 1 times [2021-05-02 13:11:22,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:22,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501600650] [2021-05-02 13:11:22,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:22,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:22,555 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 13:11:22,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:22,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501600650] [2021-05-02 13:11:22,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501600650] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:11:22,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:11:22,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:11:22,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116515323] [2021-05-02 13:11:22,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:11:22,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:22,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:11:22,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:11:22,570 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 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 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 13:11:22,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:22,692 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2021-05-02 13:11:22,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 13:11:22,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2021-05-02 13:11:22,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:22,698 INFO L225 Difference]: With dead ends: 40 [2021-05-02 13:11:22,698 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 13:11:22,701 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:11:22,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 13:11:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 13:11:22,722 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 13:11:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 13:11:22,724 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 13:11:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:22,724 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 13:11:22,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 13:11:22,724 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 13:11:22,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 13:11:22,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:22,725 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:22,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:11:22,725 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:22,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:22,726 INFO L82 PathProgramCache]: Analyzing trace with hash -273622713, now seen corresponding path program 1 times [2021-05-02 13:11:22,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:22,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487723594] [2021-05-02 13:11:22,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:22,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:11:22,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:22,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487723594] [2021-05-02 13:11:22,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487723594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:22,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91329462] [2021-05-02 13:11:22,799 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 13:11:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:22,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 13:11:22,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:22,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:22,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:11:22,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91329462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:22,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:22,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 13:11:22,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490494159] [2021-05-02 13:11:22,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:11:22,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:22,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:11:22,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:11:22,901 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:22,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:22,976 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-05-02 13:11:22,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 13:11:22,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 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 13 [2021-05-02 13:11:22,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:22,978 INFO L225 Difference]: With dead ends: 28 [2021-05-02 13:11:22,978 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 13:11:22,979 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:11:22,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 13:11:22,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 13:11:22,982 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 13:11:22,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 13:11:22,983 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2021-05-02 13:11:22,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:22,983 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 13:11:22,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:22,983 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 13:11:22,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 13:11:22,983 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:22,983 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:23,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:11:23,201 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:23,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:23,202 INFO L82 PathProgramCache]: Analyzing trace with hash -119511132, now seen corresponding path program 2 times [2021-05-02 13:11:23,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:23,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878553805] [2021-05-02 13:11:23,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:23,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:11:23,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:23,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878553805] [2021-05-02 13:11:23,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878553805] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:11:23,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:11:23,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:11:23,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533771702] [2021-05-02 13:11:23,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:11:23,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:23,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:11:23,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:11:23,270 INFO L87 Difference]: Start difference. First operand 19 states and 21 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 13:11:23,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:23,330 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-05-02 13:11:23,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 13:11:23,331 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 15 [2021-05-02 13:11:23,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:23,332 INFO L225 Difference]: With dead ends: 31 [2021-05-02 13:11:23,332 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 13:11:23,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:11:23,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 13:11:23,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 13:11:23,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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 13:11:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-05-02 13:11:23,347 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2021-05-02 13:11:23,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:23,347 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-05-02 13:11:23,347 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 13:11:23,347 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-05-02 13:11:23,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 13:11:23,348 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:23,348 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:23,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 13:11:23,348 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:23,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:23,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1433617413, now seen corresponding path program 1 times [2021-05-02 13:11:23,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:23,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959501831] [2021-05-02 13:11:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:23,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:11:23,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:23,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959501831] [2021-05-02 13:11:23,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959501831] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:11:23,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:11:23,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:11:23,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646351106] [2021-05-02 13:11:23,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:11:23,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:11:23,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:11:23,416 INFO L87 Difference]: Start difference. First operand 22 states and 25 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 13:11:23,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:23,485 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-05-02 13:11:23,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 13:11:23,485 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 19 [2021-05-02 13:11:23,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:23,487 INFO L225 Difference]: With dead ends: 31 [2021-05-02 13:11:23,488 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 13:11:23,488 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:11:23,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 13:11:23,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-05-02 13:11:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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 13:11:23,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 13:11:23,493 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2021-05-02 13:11:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:23,493 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 13:11:23,493 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 13:11:23,494 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 13:11:23,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 13:11:23,494 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:23,494 INFO L523 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:23,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 13:11:23,494 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:23,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:23,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1266318508, now seen corresponding path program 1 times [2021-05-02 13:11:23,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:23,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404684882] [2021-05-02 13:11:23,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:23,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 13:11:23,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:23,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404684882] [2021-05-02 13:11:23,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404684882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:23,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530511387] [2021-05-02 13:11:23,549 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 13:11:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:23,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 13:11:23,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:23,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 13:11:23,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530511387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:23,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:23,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 13:11:23,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996111525] [2021-05-02 13:11:23,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 13:11:23,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:23,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 13:11:23,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:11:23,654 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:23,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:23,734 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-05-02 13:11:23,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:11:23,734 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-02 13:11:23,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:23,735 INFO L225 Difference]: With dead ends: 40 [2021-05-02 13:11:23,735 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 13:11:23,736 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:11:23,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 13:11:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 13:11:23,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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 13:11:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 13:11:23,740 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 23 [2021-05-02 13:11:23,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:23,740 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 13:11:23,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:23,740 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 13:11:23,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 13:11:23,741 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:23,741 INFO L523 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:23,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:23,942 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:23,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:23,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1093697905, now seen corresponding path program 2 times [2021-05-02 13:11:23,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:23,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421346250] [2021-05-02 13:11:23,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:23,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 13:11:24,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:24,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421346250] [2021-05-02 13:11:24,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421346250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:24,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232908194] [2021-05-02 13:11:24,004 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 13:11:24,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:11:24,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:24,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 13:11:24,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:24,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:24,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:24,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:24,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:24,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:24,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:24,106 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 13:11:24,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232908194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:24,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:24,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 13:11:24,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50034000] [2021-05-02 13:11:24,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:11:24,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:24,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:11:24,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:11:24,108 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:24,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:24,262 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-05-02 13:11:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:11:24,262 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 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 25 [2021-05-02 13:11:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:24,263 INFO L225 Difference]: With dead ends: 42 [2021-05-02 13:11:24,263 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 13:11:24,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:11:24,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 13:11:24,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 13:11:24,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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 13:11:24,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-02 13:11:24,274 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 25 [2021-05-02 13:11:24,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:24,275 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-02 13:11:24,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:24,275 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-02 13:11:24,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 13:11:24,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:24,276 INFO L523 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:24,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:24,494 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:24,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:24,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1326738510, now seen corresponding path program 3 times [2021-05-02 13:11:24,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:24,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025004893] [2021-05-02 13:11:24,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:24,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 13:11:24,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:24,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025004893] [2021-05-02 13:11:24,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025004893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:24,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35782757] [2021-05-02 13:11:24,578 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 13:11:24,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 13:11:24,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:24,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 13:11:24,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:24,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:24,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:24,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:24,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-05-02 13:11:24,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35782757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:24,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:24,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-05-02 13:11:24,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918783866] [2021-05-02 13:11:24,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:11:24,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:24,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:11:24,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:11:24,718 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 13:11:24,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:24,957 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2021-05-02 13:11:24,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:11:24,958 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 27 [2021-05-02 13:11:24,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:24,959 INFO L225 Difference]: With dead ends: 50 [2021-05-02 13:11:24,959 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 13:11:24,960 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 216.2ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:11:24,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 13:11:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-05-02 13:11:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 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 13:11:24,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-05-02 13:11:24,964 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 27 [2021-05-02 13:11:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:24,964 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-05-02 13:11:24,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 13:11:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-05-02 13:11:24,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 13:11:24,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:24,965 INFO L523 BasicCegarLoop]: trace histogram [8, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:25,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:25,173 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:25,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:25,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1725195076, now seen corresponding path program 4 times [2021-05-02 13:11:25,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:25,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466939574] [2021-05-02 13:11:25,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:25,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 13:11:25,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:25,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466939574] [2021-05-02 13:11:25,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466939574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:25,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120195713] [2021-05-02 13:11:25,254 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 13:11:25,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:11:25,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:25,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 13:11:25,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:25,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:25,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:25,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:25,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:25,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:25,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:25,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:25,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:25,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:25,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 13:11:25,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120195713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:25,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:25,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 13:11:25,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018597771] [2021-05-02 13:11:25,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:11:25,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:25,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:11:25,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:11:25,376 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:25,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:25,553 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-05-02 13:11:25,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:11:25,554 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 13:11:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:25,555 INFO L225 Difference]: With dead ends: 54 [2021-05-02 13:11:25,555 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 13:11:25,555 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:11:25,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 13:11:25,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 13:11:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:25,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-05-02 13:11:25,559 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 33 [2021-05-02 13:11:25,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:25,559 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-05-02 13:11:25,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:25,559 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-05-02 13:11:25,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 13:11:25,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:25,560 INFO L523 BasicCegarLoop]: trace histogram [9, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:25,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:25,773 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:25,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1849827617, now seen corresponding path program 5 times [2021-05-02 13:11:25,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:25,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272427976] [2021-05-02 13:11:25,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:25,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 13:11:25,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:25,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272427976] [2021-05-02 13:11:25,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272427976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:25,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458866173] [2021-05-02 13:11:25,848 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 13:11:25,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 13:11:25,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:25,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 13:11:25,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:25,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:25,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:25,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:25,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:25,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:25,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 58 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 13:11:25,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458866173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:25,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:25,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-05-02 13:11:25,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44254316] [2021-05-02 13:11:25,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:11:25,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:25,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:11:25,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:11:25,968 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:26,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:26,282 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2021-05-02 13:11:26,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:11:26,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-02 13:11:26,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:26,284 INFO L225 Difference]: With dead ends: 64 [2021-05-02 13:11:26,284 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 13:11:26,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 293.9ms TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-05-02 13:11:26,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 13:11:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 13:11:26,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 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 13:11:26,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-05-02 13:11:26,289 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 35 [2021-05-02 13:11:26,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:26,289 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-05-02 13:11:26,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:26,289 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-05-02 13:11:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 13:11:26,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:26,290 INFO L523 BasicCegarLoop]: trace histogram [12, 7, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:26,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:26,493 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:26,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:26,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1311110420, now seen corresponding path program 6 times [2021-05-02 13:11:26,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:26,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943698677] [2021-05-02 13:11:26,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:26,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 13:11:26,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:26,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943698677] [2021-05-02 13:11:26,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943698677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:26,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866278369] [2021-05-02 13:11:26,575 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 13:11:26,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-02 13:11:26,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:26,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 13:11:26,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:26,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:26,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:26,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:26,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:26,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:26,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 62 proven. 8 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-05-02 13:11:26,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866278369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:26,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:26,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 14 [2021-05-02 13:11:26,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470480395] [2021-05-02 13:11:26,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:11:26,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:26,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:11:26,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:11:26,730 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:27,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:27,095 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2021-05-02 13:11:27,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 13:11:27,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-02 13:11:27,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:27,096 INFO L225 Difference]: With dead ends: 80 [2021-05-02 13:11:27,096 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 13:11:27,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 328.7ms TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2021-05-02 13:11:27,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 13:11:27,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-05-02 13:11:27,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 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 13:11:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-05-02 13:11:27,102 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 45 [2021-05-02 13:11:27,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:27,102 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-05-02 13:11:27,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:27,102 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-05-02 13:11:27,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 13:11:27,103 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:27,103 INFO L523 BasicCegarLoop]: trace histogram [14, 8, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:27,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 13:11:27,309 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:27,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1052267938, now seen corresponding path program 7 times [2021-05-02 13:11:27,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:27,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047518825] [2021-05-02 13:11:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:27,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 13:11:27,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:27,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047518825] [2021-05-02 13:11:27,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047518825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:27,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524975345] [2021-05-02 13:11:27,404 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 13:11:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:27,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 13:11:27,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:27,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:27,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:27,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:27,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:27,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:27,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:27,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:27,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:27,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:27,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:27,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:27,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:27,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:27,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:27,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:27,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 13:11:27,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524975345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:27,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:27,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-02 13:11:27,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997629452] [2021-05-02 13:11:27,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:11:27,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:27,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:11:27,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:11:27,565 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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 13:11:27,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:27,819 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2021-05-02 13:11:27,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:11:27,819 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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 51 [2021-05-02 13:11:27,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:27,820 INFO L225 Difference]: With dead ends: 84 [2021-05-02 13:11:27,820 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 13:11:27,820 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 239.5ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:11:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 13:11:27,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-02 13:11:27,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 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 13:11:27,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-05-02 13:11:27,825 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 51 [2021-05-02 13:11:27,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:27,825 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-05-02 13:11:27,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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 13:11:27,825 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-05-02 13:11:27,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 13:11:27,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:27,826 INFO L523 BasicCegarLoop]: trace histogram [15, 9, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:28,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 13:11:28,033 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:28,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:28,034 INFO L82 PathProgramCache]: Analyzing trace with hash 2066167359, now seen corresponding path program 8 times [2021-05-02 13:11:28,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:28,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782865023] [2021-05-02 13:11:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:28,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 13:11:28,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:28,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782865023] [2021-05-02 13:11:28,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782865023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:28,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485625993] [2021-05-02 13:11:28,133 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 13:11:28,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:11:28,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:28,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 13:11:28,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:28,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 13:11:28,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485625993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:28,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:28,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 13:11:28,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800204372] [2021-05-02 13:11:28,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:11:28,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:28,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:11:28,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:11:28,270 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:28,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:28,597 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2021-05-02 13:11:28,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:11:28,597 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (4), 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 53 [2021-05-02 13:11:28,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:28,598 INFO L225 Difference]: With dead ends: 86 [2021-05-02 13:11:28,598 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 13:11:28,599 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2021-05-02 13:11:28,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 13:11:28,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 13:11:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 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 13:11:28,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2021-05-02 13:11:28,604 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 53 [2021-05-02 13:11:28,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:28,604 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2021-05-02 13:11:28,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:28,604 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2021-05-02 13:11:28,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 13:11:28,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:28,605 INFO L523 BasicCegarLoop]: trace histogram [16, 10, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:28,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:28,825 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:28,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:28,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1465934748, now seen corresponding path program 9 times [2021-05-02 13:11:28,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:28,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973001679] [2021-05-02 13:11:28,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:28,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 121 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 13:11:28,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:28,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973001679] [2021-05-02 13:11:28,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973001679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:28,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565595304] [2021-05-02 13:11:28,936 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 13:11:28,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-02 13:11:28,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:28,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 13:11:28,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:29,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 108 proven. 18 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-05-02 13:11:29,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565595304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:29,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:29,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2021-05-02 13:11:29,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573269942] [2021-05-02 13:11:29,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 13:11:29,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:29,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 13:11:29,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 13:11:29,098 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:29,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:29,558 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2021-05-02 13:11:29,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 13:11:29,559 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-02 13:11:29,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:29,559 INFO L225 Difference]: With dead ends: 94 [2021-05-02 13:11:29,559 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 13:11:29,560 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 13:11:29,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 13:11:29,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-05-02 13:11:29,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 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 13:11:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-05-02 13:11:29,565 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 55 [2021-05-02 13:11:29,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:29,565 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-05-02 13:11:29,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:29,565 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-05-02 13:11:29,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 13:11:29,566 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:29,566 INFO L523 BasicCegarLoop]: trace histogram [18, 11, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:29,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:29,782 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:29,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:29,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1215207918, now seen corresponding path program 10 times [2021-05-02 13:11:29,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:29,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007052103] [2021-05-02 13:11:29,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:29,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-05-02 13:11:29,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:29,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007052103] [2021-05-02 13:11:29,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007052103] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:29,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828701800] [2021-05-02 13:11:29,897 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 13:11:29,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:11:29,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:29,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 13:11:29,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:29,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:29,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-05-02 13:11:30,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828701800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:30,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:30,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 13:11:30,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589452657] [2021-05-02 13:11:30,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 13:11:30,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:30,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 13:11:30,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:11:30,050 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:30,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:30,387 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2021-05-02 13:11:30,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 13:11:30,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-05-02 13:11:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:30,388 INFO L225 Difference]: With dead ends: 98 [2021-05-02 13:11:30,388 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 13:11:30,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 342.6ms TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2021-05-02 13:11:30,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 13:11:30,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 13:11:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 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 13:11:30,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2021-05-02 13:11:30,406 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 61 [2021-05-02 13:11:30,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:30,406 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2021-05-02 13:11:30,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:30,406 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2021-05-02 13:11:30,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 13:11:30,406 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:30,407 INFO L523 BasicCegarLoop]: trace histogram [19, 12, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:30,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 13:11:30,609 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:30,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:30,609 INFO L82 PathProgramCache]: Analyzing trace with hash 791275119, now seen corresponding path program 11 times [2021-05-02 13:11:30,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:30,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610961811] [2021-05-02 13:11:30,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:30,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 169 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-05-02 13:11:30,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:30,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610961811] [2021-05-02 13:11:30,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610961811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:30,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815470969] [2021-05-02 13:11:30,760 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 13:11:30,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-02 13:11:30,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:30,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 13:11:30,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:30,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 256 proven. 39 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-05-02 13:11:30,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815470969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:30,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:30,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2021-05-02 13:11:30,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012656695] [2021-05-02 13:11:30,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 13:11:30,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:30,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 13:11:30,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:11:30,965 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:31,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:31,541 INFO L93 Difference]: Finished difference Result 112 states and 141 transitions. [2021-05-02 13:11:31,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 13:11:31,542 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-02 13:11:31,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:31,542 INFO L225 Difference]: With dead ends: 112 [2021-05-02 13:11:31,542 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 13:11:31,543 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 637.8ms TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 13:11:31,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 13:11:31,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 13:11:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 73 states have internal predecessors, (88), 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 13:11:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2021-05-02 13:11:31,547 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 63 [2021-05-02 13:11:31,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:31,548 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2021-05-02 13:11:31,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:31,548 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2021-05-02 13:11:31,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 13:11:31,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:31,548 INFO L523 BasicCegarLoop]: trace histogram [23, 13, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:31,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 13:11:31,761 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:31,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:31,761 INFO L82 PathProgramCache]: Analyzing trace with hash -707156463, now seen corresponding path program 12 times [2021-05-02 13:11:31,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:31,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058080407] [2021-05-02 13:11:31,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:31,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 266 proven. 182 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-05-02 13:11:31,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:31,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058080407] [2021-05-02 13:11:31,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058080407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:31,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939729231] [2021-05-02 13:11:31,897 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 13:11:31,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 13:11:31,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:31,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 13:11:31,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:32,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:32,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:32,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:32,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:32,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:32,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:32,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:32,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:32,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:32,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 220 proven. 32 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-05-02 13:11:32,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939729231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:32,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:32,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2021-05-02 13:11:32,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037010898] [2021-05-02 13:11:32,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 13:11:32,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:32,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 13:11:32,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:11:32,129 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:32,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:32,745 INFO L93 Difference]: Finished difference Result 132 states and 166 transitions. [2021-05-02 13:11:32,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 13:11:32,745 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-02 13:11:32,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:32,746 INFO L225 Difference]: With dead ends: 132 [2021-05-02 13:11:32,746 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 13:11:32,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 627.4ms TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 13:11:32,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 13:11:32,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-05-02 13:11:32,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 79 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 13:11:32,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2021-05-02 13:11:32,752 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 77 [2021-05-02 13:11:32,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:32,752 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2021-05-02 13:11:32,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:32,752 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2021-05-02 13:11:32,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 13:11:32,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:32,753 INFO L523 BasicCegarLoop]: trace histogram [25, 14, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:32,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 13:11:32,969 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:32,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:32,970 INFO L82 PathProgramCache]: Analyzing trace with hash 107815495, now seen corresponding path program 13 times [2021-05-02 13:11:32,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:32,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944576889] [2021-05-02 13:11:32,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:33,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 315 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-05-02 13:11:33,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:33,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944576889] [2021-05-02 13:11:33,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944576889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:33,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542986278] [2021-05-02 13:11:33,152 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 13:11:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:33,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 13:11:33,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:33,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 315 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-05-02 13:11:33,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542986278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:33,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:33,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-02 13:11:33,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571569905] [2021-05-02 13:11:33,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 13:11:33,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:33,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 13:11:33,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:11:33,320 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:33,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:33,822 INFO L93 Difference]: Finished difference Result 136 states and 169 transitions. [2021-05-02 13:11:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 13:11:33,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-02 13:11:33,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:33,824 INFO L225 Difference]: With dead ends: 136 [2021-05-02 13:11:33,824 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 13:11:33,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 503.7ms TimeCoverageRelationStatistics Valid=426, Invalid=696, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 13:11:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 13:11:33,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-02 13:11:33,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 81 states have internal predecessors, (98), 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 13:11:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2021-05-02 13:11:33,831 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 83 [2021-05-02 13:11:33,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:33,831 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2021-05-02 13:11:33,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:33,831 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2021-05-02 13:11:33,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 13:11:33,832 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:33,832 INFO L523 BasicCegarLoop]: trace histogram [26, 15, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:34,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:34,050 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:34,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:34,051 INFO L82 PathProgramCache]: Analyzing trace with hash -55947548, now seen corresponding path program 14 times [2021-05-02 13:11:34,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:34,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955900272] [2021-05-02 13:11:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:34,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 336 proven. 240 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-05-02 13:11:34,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:34,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955900272] [2021-05-02 13:11:34,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955900272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:34,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159836807] [2021-05-02 13:11:34,205 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 13:11:34,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:11:34,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:34,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:11:34,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:34,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 336 proven. 240 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-05-02 13:11:34,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159836807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:34,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:34,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-02 13:11:34,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619292874] [2021-05-02 13:11:34,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 13:11:34,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:34,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 13:11:34,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 13:11:34,408 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 13:11:34,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:34,910 INFO L93 Difference]: Finished difference Result 138 states and 171 transitions. [2021-05-02 13:11:34,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 13:11:34,910 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 85 [2021-05-02 13:11:34,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:34,911 INFO L225 Difference]: With dead ends: 138 [2021-05-02 13:11:34,911 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 13:11:34,912 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 496.8ms TimeCoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 13:11:34,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 13:11:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-05-02 13:11:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 83 states have internal predecessors, (100), 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 13:11:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2021-05-02 13:11:34,917 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 85 [2021-05-02 13:11:34,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:34,918 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2021-05-02 13:11:34,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 13:11:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2021-05-02 13:11:34,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 13:11:34,919 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:34,919 INFO L523 BasicCegarLoop]: trace histogram [27, 16, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:35,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 13:11:35,137 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:35,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1481558081, now seen corresponding path program 15 times [2021-05-02 13:11:35,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:35,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312454857] [2021-05-02 13:11:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:35,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-05-02 13:11:35,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:35,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312454857] [2021-05-02 13:11:35,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312454857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:35,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218557992] [2021-05-02 13:11:35,342 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 13:11:35,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-02 13:11:35,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 13:11:35,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:35,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:35,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:35,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:35,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:35,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:35,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:35,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:35,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:35,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:35,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:35,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:35,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 302 proven. 50 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2021-05-02 13:11:35,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218557992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:35,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:35,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2021-05-02 13:11:35,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595911627] [2021-05-02 13:11:35,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 13:11:35,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:35,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 13:11:35,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 13:11:35,657 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:36,525 INFO L93 Difference]: Finished difference Result 146 states and 184 transitions. [2021-05-02 13:11:36,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 13:11:36,526 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-05-02 13:11:36,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:36,526 INFO L225 Difference]: With dead ends: 146 [2021-05-02 13:11:36,526 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 13:11:36,527 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 914.1ms TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 13:11:36,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 13:11:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2021-05-02 13:11:36,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.2134831460674158) internal successors, (108), 89 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 13:11:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2021-05-02 13:11:36,534 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 87 [2021-05-02 13:11:36,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:36,534 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2021-05-02 13:11:36,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:36,535 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2021-05-02 13:11:36,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 13:11:36,535 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:36,535 INFO L523 BasicCegarLoop]: trace histogram [29, 17, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:36,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:36,740 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:36,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:36,740 INFO L82 PathProgramCache]: Analyzing trace with hash 2021997623, now seen corresponding path program 16 times [2021-05-02 13:11:36,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:36,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043783383] [2021-05-02 13:11:36,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:37,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 414 proven. 306 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 13:11:37,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:37,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043783383] [2021-05-02 13:11:37,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043783383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:37,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721328692] [2021-05-02 13:11:37,013 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 13:11:37,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:11:37,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:37,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:11:37,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:37,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 414 proven. 306 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 13:11:37,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721328692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:37,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:37,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-02 13:11:37,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971793291] [2021-05-02 13:11:37,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 13:11:37,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:37,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 13:11:37,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:11:37,324 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:37,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:37,946 INFO L93 Difference]: Finished difference Result 150 states and 187 transitions. [2021-05-02 13:11:37,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 13:11:37,947 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-02 13:11:37,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:37,948 INFO L225 Difference]: With dead ends: 150 [2021-05-02 13:11:37,948 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 13:11:37,948 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 702.9ms TimeCoverageRelationStatistics Valid=591, Invalid=969, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 13:11:37,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 13:11:37,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-02 13:11:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.2087912087912087) internal successors, (110), 91 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 13:11:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2021-05-02 13:11:37,955 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 93 [2021-05-02 13:11:37,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:37,955 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2021-05-02 13:11:37,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:37,955 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2021-05-02 13:11:37,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 13:11:37,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:37,955 INFO L523 BasicCegarLoop]: trace histogram [30, 18, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:38,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:38,169 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:38,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:38,170 INFO L82 PathProgramCache]: Analyzing trace with hash 628951188, now seen corresponding path program 17 times [2021-05-02 13:11:38,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:38,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902829807] [2021-05-02 13:11:38,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:38,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 437 proven. 342 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-02 13:11:38,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:38,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902829807] [2021-05-02 13:11:38,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902829807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:38,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65727675] [2021-05-02 13:11:38,385 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 13:11:38,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-05-02 13:11:38,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:38,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 13:11:38,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:38,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 646 proven. 126 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-05-02 13:11:38,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65727675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:38,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:38,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 32 [2021-05-02 13:11:38,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043737997] [2021-05-02 13:11:38,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 13:11:38,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:38,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 13:11:38,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 13:11:38,777 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand has 32 states, 32 states have (on average 2.75) internal successors, (88), 31 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:39,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:39,957 INFO L93 Difference]: Finished difference Result 168 states and 213 transitions. [2021-05-02 13:11:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 13:11:39,958 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 31 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-05-02 13:11:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:39,958 INFO L225 Difference]: With dead ends: 168 [2021-05-02 13:11:39,958 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 13:11:39,960 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1346.7ms TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 13:11:39,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 13:11:39,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-05-02 13:11:39,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 109 states have internal predecessors, (132), 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 13:11:39,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2021-05-02 13:11:39,971 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 95 [2021-05-02 13:11:39,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:39,971 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2021-05-02 13:11:39,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 31 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:39,971 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2021-05-02 13:11:39,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 13:11:39,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:39,972 INFO L523 BasicCegarLoop]: trace histogram [35, 19, 16, 16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:40,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 13:11:40,190 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:40,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:40,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1268861965, now seen corresponding path program 18 times [2021-05-02 13:11:40,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:40,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141421415] [2021-05-02 13:11:40,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:40,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1465 backedges. 620 proven. 380 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-05-02 13:11:40,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:40,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141421415] [2021-05-02 13:11:40,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141421415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:40,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182393109] [2021-05-02 13:11:40,469 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 13:11:40,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-05-02 13:11:40,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:40,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 13:11:40,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:40,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:40,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:40,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:40,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:40,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:40,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:40,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:40,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:40,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:40,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:40,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:40,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:40,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:40,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1465 backedges. 500 proven. 72 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2021-05-02 13:11:40,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182393109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:40,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:40,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 9] total 30 [2021-05-02 13:11:40,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996757133] [2021-05-02 13:11:40,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 13:11:40,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:40,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 13:11:40,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 13:11:40,835 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 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 13:11:41,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:41,904 INFO L93 Difference]: Finished difference Result 192 states and 242 transitions. [2021-05-02 13:11:41,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 13:11:41,904 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 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 113 [2021-05-02 13:11:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:41,905 INFO L225 Difference]: With dead ends: 192 [2021-05-02 13:11:41,905 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 13:11:41,906 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1165.5ms TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 13:11:41,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 13:11:41,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2021-05-02 13:11:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.2173913043478262) internal successors, (140), 115 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 13:11:41,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 144 transitions. [2021-05-02 13:11:41,911 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 144 transitions. Word has length 113 [2021-05-02 13:11:41,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:41,911 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 144 transitions. [2021-05-02 13:11:41,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 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 13:11:41,911 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 144 transitions. [2021-05-02 13:11:41,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-02 13:11:41,912 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:41,912 INFO L523 BasicCegarLoop]: trace histogram [37, 20, 17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:42,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:42,129 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:42,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:42,130 INFO L82 PathProgramCache]: Analyzing trace with hash 347045827, now seen corresponding path program 19 times [2021-05-02 13:11:42,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:42,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667953574] [2021-05-02 13:11:42,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:42,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 693 proven. 420 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-05-02 13:11:42,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:42,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667953574] [2021-05-02 13:11:42,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667953574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:42,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233129801] [2021-05-02 13:11:42,426 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 13:11:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:42,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 13:11:42,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:42,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,619 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 13:11:42,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,634 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 13:11:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 693 proven. 420 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-05-02 13:11:42,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233129801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:42,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:42,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-02 13:11:42,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485740842] [2021-05-02 13:11:42,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 13:11:42,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:42,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 13:11:42,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 13:11:42,701 INFO L87 Difference]: Start difference. First operand 120 states and 144 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:43,272 INFO L93 Difference]: Finished difference Result 196 states and 245 transitions. [2021-05-02 13:11:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 13:11:43,272 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2021-05-02 13:11:43,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:43,273 INFO L225 Difference]: With dead ends: 196 [2021-05-02 13:11:43,273 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 13:11:43,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 747.0ms TimeCoverageRelationStatistics Valid=783, Invalid=1287, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 13:11:43,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 13:11:43,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-05-02 13:11:43,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.2136752136752136) internal successors, (142), 117 states have internal predecessors, (142), 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 13:11:43,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2021-05-02 13:11:43,278 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 119 [2021-05-02 13:11:43,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:43,278 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2021-05-02 13:11:43,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:43,278 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2021-05-02 13:11:43,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-02 13:11:43,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:43,279 INFO L523 BasicCegarLoop]: trace histogram [38, 21, 17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:43,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 13:11:43,493 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:43,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:43,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1454596576, now seen corresponding path program 20 times [2021-05-02 13:11:43,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:43,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017987383] [2021-05-02 13:11:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:43,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 726 proven. 462 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-05-02 13:11:43,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:43,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017987383] [2021-05-02 13:11:43,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017987383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:43,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523824155] [2021-05-02 13:11:43,754 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 13:11:43,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:11:43,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:43,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:11:43,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:43,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 726 proven. 462 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-05-02 13:11:43,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523824155] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:43,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:43,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2021-05-02 13:11:43,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597037658] [2021-05-02 13:11:43,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 13:11:43,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:43,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 13:11:43,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 13:11:43,962 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:44,641 INFO L93 Difference]: Finished difference Result 198 states and 247 transitions. [2021-05-02 13:11:44,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 13:11:44,641 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 2 states have call successors, (4), 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 13:11:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:44,642 INFO L225 Difference]: With dead ends: 198 [2021-05-02 13:11:44,642 INFO L226 Difference]: Without dead ends: 124 [2021-05-02 13:11:44,643 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 755.4ms TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 13:11:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-02 13:11:44,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-05-02 13:11:44,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 119 states have internal predecessors, (144), 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 13:11:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2021-05-02 13:11:44,648 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 121 [2021-05-02 13:11:44,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:44,648 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2021-05-02 13:11:44,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:44,648 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2021-05-02 13:11:44,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-02 13:11:44,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:44,649 INFO L523 BasicCegarLoop]: trace histogram [39, 22, 17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:44,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 13:11:44,853 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:44,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:44,853 INFO L82 PathProgramCache]: Analyzing trace with hash 658976957, now seen corresponding path program 21 times [2021-05-02 13:11:44,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:44,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349779261] [2021-05-02 13:11:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:45,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1793 backedges. 759 proven. 506 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-05-02 13:11:45,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:45,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349779261] [2021-05-02 13:11:45,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349779261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:45,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953279851] [2021-05-02 13:11:45,118 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 13:11:45,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 13:11:45,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:45,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 13:11:45,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:45,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1793 backedges. 622 proven. 98 refuted. 0 times theorem prover too weak. 1073 trivial. 0 not checked. [2021-05-02 13:11:45,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953279851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:45,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:45,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2021-05-02 13:11:45,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832098930] [2021-05-02 13:11:45,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 13:11:45,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:45,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 13:11:45,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 13:11:45,503 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 33 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:46,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:46,597 INFO L93 Difference]: Finished difference Result 206 states and 260 transitions. [2021-05-02 13:11:46,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 13:11:46,598 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 33 states have internal predecessors, (96), 2 states have call successors, (4), 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 13:11:46,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:46,598 INFO L225 Difference]: With dead ends: 206 [2021-05-02 13:11:46,598 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 13:11:46,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1271.0ms TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 13:11:46,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 13:11:46,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2021-05-02 13:11:46,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.216) internal successors, (152), 125 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 13:11:46,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 156 transitions. [2021-05-02 13:11:46,604 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 156 transitions. Word has length 123 [2021-05-02 13:11:46,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:46,605 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 156 transitions. [2021-05-02 13:11:46,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 33 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:46,605 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 156 transitions. [2021-05-02 13:11:46,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 13:11:46,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:46,605 INFO L523 BasicCegarLoop]: trace histogram [41, 23, 18, 18, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:46,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:46,813 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:46,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:46,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1985362995, now seen corresponding path program 22 times [2021-05-02 13:11:46,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:46,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272015604] [2021-05-02 13:11:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:47,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1987 backedges. 840 proven. 552 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 13:11:47,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:47,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272015604] [2021-05-02 13:11:47,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272015604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:47,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986201445] [2021-05-02 13:11:47,086 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 13:11:47,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:11:47,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:47,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 13:11:47,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:47,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1987 backedges. 840 proven. 552 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 13:11:47,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986201445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:47,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:47,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-02 13:11:47,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660469462] [2021-05-02 13:11:47,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 13:11:47,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:47,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 13:11:47,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 13:11:47,349 INFO L87 Difference]: Start difference. First operand 130 states and 156 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:48,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:48,116 INFO L93 Difference]: Finished difference Result 210 states and 263 transitions. [2021-05-02 13:11:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 13:11:48,116 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2021-05-02 13:11:48,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:48,117 INFO L225 Difference]: With dead ends: 210 [2021-05-02 13:11:48,117 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 13:11:48,118 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 851.5ms TimeCoverageRelationStatistics Valid=1002, Invalid=1650, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 13:11:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 13:11:48,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-05-02 13:11:48,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.2125984251968505) internal successors, (154), 127 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 13:11:48,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 158 transitions. [2021-05-02 13:11:48,123 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 158 transitions. Word has length 129 [2021-05-02 13:11:48,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:48,123 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 158 transitions. [2021-05-02 13:11:48,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:48,123 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 158 transitions. [2021-05-02 13:11:48,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 13:11:48,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:48,124 INFO L523 BasicCegarLoop]: trace histogram [42, 24, 18, 18, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:48,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 13:11:48,337 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:48,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:48,338 INFO L82 PathProgramCache]: Analyzing trace with hash 340778512, now seen corresponding path program 23 times [2021-05-02 13:11:48,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:48,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622910850] [2021-05-02 13:11:48,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:48,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 875 proven. 600 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-02 13:11:48,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:48,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622910850] [2021-05-02 13:11:48,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622910850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:48,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439918599] [2021-05-02 13:11:48,659 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 13:11:48,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-05-02 13:11:48,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:48,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:11:48,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:48,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 1254 proven. 256 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2021-05-02 13:11:49,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439918599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:49,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:49,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 15] total 41 [2021-05-02 13:11:49,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141573518] [2021-05-02 13:11:49,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 13:11:49,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:49,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 13:11:49,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 13:11:49,182 INFO L87 Difference]: Start difference. First operand 132 states and 158 transitions. Second operand has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 40 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:50,633 INFO L93 Difference]: Finished difference Result 224 states and 283 transitions. [2021-05-02 13:11:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 13:11:50,633 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 40 states have internal predecessors, (114), 2 states have call successors, (4), 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 13:11:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:50,634 INFO L225 Difference]: With dead ends: 224 [2021-05-02 13:11:50,634 INFO L226 Difference]: Without dead ends: 146 [2021-05-02 13:11:50,636 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1786.0ms TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 13:11:50,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-02 13:11:50,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-05-02 13:11:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.2127659574468086) internal successors, (171), 141 states have internal predecessors, (171), 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 13:11:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2021-05-02 13:11:50,641 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 131 [2021-05-02 13:11:50,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:50,641 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2021-05-02 13:11:50,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 40 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2021-05-02 13:11:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-02 13:11:50,642 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:50,642 INFO L523 BasicCegarLoop]: trace histogram [46, 25, 21, 21, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:50,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:50,860 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:50,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1617788494, now seen corresponding path program 24 times [2021-05-02 13:11:50,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:50,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706377678] [2021-05-02 13:11:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:51,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2536 backedges. 1066 proven. 650 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2021-05-02 13:11:51,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:51,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706377678] [2021-05-02 13:11:51,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706377678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:51,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516448114] [2021-05-02 13:11:51,188 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 13:11:51,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2021-05-02 13:11:51,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:51,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 13:11:51,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:51,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2536 backedges. 858 proven. 128 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2021-05-02 13:11:51,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516448114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:51,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:51,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11] total 38 [2021-05-02 13:11:51,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645764093] [2021-05-02 13:11:51,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 13:11:51,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:51,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 13:11:51,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 13:11:51,649 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:52,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:52,939 INFO L93 Difference]: Finished difference Result 244 states and 308 transitions. [2021-05-02 13:11:52,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 13:11:52,940 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2021-05-02 13:11:52,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:52,941 INFO L225 Difference]: With dead ends: 244 [2021-05-02 13:11:52,941 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 13:11:52,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1556.5ms TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 13:11:52,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 13:11:52,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-05-02 13:11:52,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.217687074829932) internal successors, (179), 147 states have internal predecessors, (179), 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 13:11:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 183 transitions. [2021-05-02 13:11:52,948 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 183 transitions. Word has length 145 [2021-05-02 13:11:52,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:52,948 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 183 transitions. [2021-05-02 13:11:52,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:52,948 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 183 transitions. [2021-05-02 13:11:52,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-02 13:11:52,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:52,949 INFO L523 BasicCegarLoop]: trace histogram [48, 26, 22, 22, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:53,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 13:11:53,153 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:53,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:53,156 INFO L82 PathProgramCache]: Analyzing trace with hash 2065606376, now seen corresponding path program 25 times [2021-05-02 13:11:53,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:53,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960415445] [2021-05-02 13:11:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:53,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2766 backedges. 1161 proven. 702 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-05-02 13:11:53,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:53,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960415445] [2021-05-02 13:11:53,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960415445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:53,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115827725] [2021-05-02 13:11:53,525 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 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 13:11:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:53,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 13:11:53,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:53,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2766 backedges. 1161 proven. 702 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-05-02 13:11:53,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115827725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:53,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:53,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-02 13:11:53,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443894900] [2021-05-02 13:11:53,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 13:11:53,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:53,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 13:11:53,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 13:11:53,768 INFO L87 Difference]: Start difference. First operand 152 states and 183 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:54,666 INFO L93 Difference]: Finished difference Result 248 states and 311 transitions. [2021-05-02 13:11:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 13:11:54,666 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2021-05-02 13:11:54,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:54,667 INFO L225 Difference]: With dead ends: 248 [2021-05-02 13:11:54,667 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 13:11:54,668 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1020.2ms TimeCoverageRelationStatistics Valid=1248, Invalid=2058, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 13:11:54,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 13:11:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-05-02 13:11:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.2147651006711409) internal successors, (181), 149 states have internal predecessors, (181), 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 13:11:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2021-05-02 13:11:54,674 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 151 [2021-05-02 13:11:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:54,674 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2021-05-02 13:11:54,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:54,674 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2021-05-02 13:11:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-02 13:11:54,675 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:54,675 INFO L523 BasicCegarLoop]: trace histogram [49, 27, 22, 22, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:54,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 13:11:54,887 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:54,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:54,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1500850939, now seen corresponding path program 26 times [2021-05-02 13:11:54,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:54,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871344257] [2021-05-02 13:11:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:55,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2863 backedges. 1204 proven. 756 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-05-02 13:11:55,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:55,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871344257] [2021-05-02 13:11:55,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871344257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:55,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446010881] [2021-05-02 13:11:55,246 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 13:11:55,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:11:55,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:55,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 13:11:55,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:55,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2863 backedges. 1204 proven. 756 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-05-02 13:11:55,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446010881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:55,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:55,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2021-05-02 13:11:55,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337338771] [2021-05-02 13:11:55,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 13:11:55,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:55,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 13:11:55,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 13:11:55,500 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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 13:11:56,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:56,434 INFO L93 Difference]: Finished difference Result 250 states and 313 transitions. [2021-05-02 13:11:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 13:11:56,434 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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 153 [2021-05-02 13:11:56,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:56,435 INFO L225 Difference]: With dead ends: 250 [2021-05-02 13:11:56,435 INFO L226 Difference]: Without dead ends: 156 [2021-05-02 13:11:56,437 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1075.8ms TimeCoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 13:11:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-02 13:11:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-05-02 13:11:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.2119205298013245) internal successors, (183), 151 states have internal predecessors, (183), 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 13:11:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 187 transitions. [2021-05-02 13:11:56,442 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 187 transitions. Word has length 153 [2021-05-02 13:11:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:56,443 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 187 transitions. [2021-05-02 13:11:56,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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 13:11:56,443 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 187 transitions. [2021-05-02 13:11:56,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-02 13:11:56,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:56,444 INFO L523 BasicCegarLoop]: trace histogram [50, 28, 22, 22, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:56,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:56,644 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:56,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:56,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1482428446, now seen corresponding path program 27 times [2021-05-02 13:11:56,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:56,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931802185] [2021-05-02 13:11:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:57,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2962 backedges. 1247 proven. 812 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-05-02 13:11:57,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:57,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931802185] [2021-05-02 13:11:57,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931802185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:57,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997483306] [2021-05-02 13:11:57,041 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 13:11:57,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-05-02 13:11:57,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:57,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 13:11:57,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:57,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2962 backedges. 1016 proven. 162 refuted. 0 times theorem prover too weak. 1784 trivial. 0 not checked. [2021-05-02 13:11:57,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997483306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:57,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:57,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2021-05-02 13:11:57,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239753448] [2021-05-02 13:11:57,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 13:11:57,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:57,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 13:11:57,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 13:11:57,548 INFO L87 Difference]: Start difference. First operand 156 states and 187 transitions. Second operand has 42 states, 42 states have (on average 2.761904761904762) internal successors, (116), 41 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:59,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:59,306 INFO L93 Difference]: Finished difference Result 258 states and 326 transitions. [2021-05-02 13:11:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 13:11:59,306 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.761904761904762) internal successors, (116), 41 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2021-05-02 13:11:59,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:59,307 INFO L225 Difference]: With dead ends: 258 [2021-05-02 13:11:59,307 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 13:11:59,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 2061.1ms TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 13:11:59,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 13:11:59,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2021-05-02 13:11:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.21656050955414) internal successors, (191), 157 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 13:11:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 195 transitions. [2021-05-02 13:11:59,317 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 195 transitions. Word has length 155 [2021-05-02 13:11:59,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:59,317 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 195 transitions. [2021-05-02 13:11:59,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.761904761904762) internal successors, (116), 41 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:59,317 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 195 transitions. [2021-05-02 13:11:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-05-02 13:11:59,318 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:59,318 INFO L523 BasicCegarLoop]: trace histogram [52, 29, 23, 23, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:59,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:59,536 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:59,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:59,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1084304600, now seen corresponding path program 28 times [2021-05-02 13:11:59,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:59,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679687228] [2021-05-02 13:11:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:00,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 1350 proven. 870 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-05-02 13:12:00,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:00,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679687228] [2021-05-02 13:12:00,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679687228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:00,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701059034] [2021-05-02 13:12:00,042 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 13:12:00,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:12:00,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:00,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:12:00,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:00,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 1350 proven. 870 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-05-02 13:12:00,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701059034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:00,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:00,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-02 13:12:00,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135043282] [2021-05-02 13:12:00,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 13:12:00,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:00,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 13:12:00,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 13:12:00,332 INFO L87 Difference]: Start difference. First operand 162 states and 195 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:01,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:01,487 INFO L93 Difference]: Finished difference Result 262 states and 329 transitions. [2021-05-02 13:12:01,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 13:12:01,487 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2021-05-02 13:12:01,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:01,488 INFO L225 Difference]: With dead ends: 262 [2021-05-02 13:12:01,488 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 13:12:01,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1386.8ms TimeCoverageRelationStatistics Valid=1521, Invalid=2511, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 13:12:01,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 13:12:01,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-05-02 13:12:01,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.2138364779874213) internal successors, (193), 159 states have internal predecessors, (193), 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 13:12:01,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 197 transitions. [2021-05-02 13:12:01,495 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 197 transitions. Word has length 161 [2021-05-02 13:12:01,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:01,495 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 197 transitions. [2021-05-02 13:12:01,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:01,495 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 197 transitions. [2021-05-02 13:12:01,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-05-02 13:12:01,496 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:01,496 INFO L523 BasicCegarLoop]: trace histogram [53, 30, 23, 23, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:01,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 13:12:01,709 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:01,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:01,710 INFO L82 PathProgramCache]: Analyzing trace with hash 185866933, now seen corresponding path program 29 times [2021-05-02 13:12:01,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:01,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627566493] [2021-05-02 13:12:01,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:02,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3315 backedges. 1395 proven. 930 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-05-02 13:12:02,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:02,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627566493] [2021-05-02 13:12:02,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627566493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:02,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259779326] [2021-05-02 13:12:02,191 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 13:12:02,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-05-02 13:12:02,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:02,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:12:02,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:02,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3315 backedges. 2010 proven. 441 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2021-05-02 13:12:03,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259779326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:03,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:03,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 19] total 51 [2021-05-02 13:12:03,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848715163] [2021-05-02 13:12:03,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 13:12:03,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:03,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 13:12:03,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 13:12:03,017 INFO L87 Difference]: Start difference. First operand 164 states and 197 transitions. Second operand has 51 states, 51 states have (on average 2.7450980392156863) internal successors, (140), 50 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:05,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:05,377 INFO L93 Difference]: Finished difference Result 280 states and 355 transitions. [2021-05-02 13:12:05,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 13:12:05,378 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.7450980392156863) internal successors, (140), 50 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2021-05-02 13:12:05,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:05,379 INFO L225 Difference]: With dead ends: 280 [2021-05-02 13:12:05,379 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 13:12:05,381 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 2977.6ms TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 13:12:05,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 13:12:05,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-05-02 13:12:05,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2146892655367232) internal successors, (215), 177 states have internal predecessors, (215), 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 13:12:05,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 219 transitions. [2021-05-02 13:12:05,390 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 219 transitions. Word has length 163 [2021-05-02 13:12:05,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:05,391 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 219 transitions. [2021-05-02 13:12:05,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.7450980392156863) internal successors, (140), 50 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 219 transitions. [2021-05-02 13:12:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-05-02 13:12:05,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:05,392 INFO L523 BasicCegarLoop]: trace histogram [58, 31, 27, 27, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:05,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:05,601 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:05,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:05,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1993814610, now seen corresponding path program 30 times [2021-05-02 13:12:05,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:05,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763649775] [2021-05-02 13:12:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:06,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4066 backedges. 1696 proven. 992 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-05-02 13:12:06,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:06,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763649775] [2021-05-02 13:12:06,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763649775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:06,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959923031] [2021-05-02 13:12:06,162 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 13:12:06,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-05-02 13:12:06,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:06,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 13:12:06,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:06,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4066 backedges. 1354 proven. 200 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2021-05-02 13:12:06,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959923031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:06,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:06,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 13] total 46 [2021-05-02 13:12:06,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435342668] [2021-05-02 13:12:06,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 13:12:06,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:06,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 13:12:06,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 13:12:06,852 INFO L87 Difference]: Start difference. First operand 182 states and 219 transitions. Second operand has 46 states, 46 states have (on average 2.739130434782609) internal successors, (126), 45 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:08,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:08,675 INFO L93 Difference]: Finished difference Result 304 states and 384 transitions. [2021-05-02 13:12:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 13:12:08,675 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.739130434782609) internal successors, (126), 45 states have internal predecessors, (126), 2 states have call successors, (4), 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 13:12:08,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:08,676 INFO L225 Difference]: With dead ends: 304 [2021-05-02 13:12:08,676 INFO L226 Difference]: Without dead ends: 190 [2021-05-02 13:12:08,677 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 2369.9ms TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 13:12:08,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-02 13:12:08,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2021-05-02 13:12:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.2185792349726776) internal successors, (223), 183 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:08,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 227 transitions. [2021-05-02 13:12:08,684 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 227 transitions. Word has length 181 [2021-05-02 13:12:08,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:08,684 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 227 transitions. [2021-05-02 13:12:08,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.739130434782609) internal successors, (126), 45 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:08,684 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 227 transitions. [2021-05-02 13:12:08,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-05-02 13:12:08,685 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:08,685 INFO L523 BasicCegarLoop]: trace histogram [60, 32, 28, 28, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:08,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 13:12:08,889 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:08,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:08,890 INFO L82 PathProgramCache]: Analyzing trace with hash -939922844, now seen corresponding path program 31 times [2021-05-02 13:12:08,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:08,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132982260] [2021-05-02 13:12:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:09,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 1815 proven. 1056 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2021-05-02 13:12:09,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:09,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132982260] [2021-05-02 13:12:09,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132982260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:09,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085072324] [2021-05-02 13:12:09,372 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 13:12:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:09,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:12:09,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:09,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 1815 proven. 1056 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2021-05-02 13:12:09,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085072324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:09,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:09,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-05-02 13:12:09,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440289566] [2021-05-02 13:12:09,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 13:12:09,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:09,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 13:12:09,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 13:12:09,657 INFO L87 Difference]: Start difference. First operand 188 states and 227 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:10,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:10,815 INFO L93 Difference]: Finished difference Result 308 states and 387 transitions. [2021-05-02 13:12:10,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 13:12:10,816 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2021-05-02 13:12:10,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:10,817 INFO L225 Difference]: With dead ends: 308 [2021-05-02 13:12:10,817 INFO L226 Difference]: Without dead ends: 190 [2021-05-02 13:12:10,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1403.7ms TimeCoverageRelationStatistics Valid=1821, Invalid=3009, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 13:12:10,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-02 13:12:10,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2021-05-02 13:12:10,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.2162162162162162) internal successors, (225), 185 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:10,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 229 transitions. [2021-05-02 13:12:10,823 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 229 transitions. Word has length 187 [2021-05-02 13:12:10,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:10,824 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 229 transitions. [2021-05-02 13:12:10,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:10,824 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 229 transitions. [2021-05-02 13:12:10,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-05-02 13:12:10,825 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:10,825 INFO L523 BasicCegarLoop]: trace histogram [61, 33, 28, 28, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:11,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 13:12:11,042 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:11,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:11,043 INFO L82 PathProgramCache]: Analyzing trace with hash 258608641, now seen corresponding path program 32 times [2021-05-02 13:12:11,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:11,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390363793] [2021-05-02 13:12:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:11,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4477 backedges. 1870 proven. 1122 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2021-05-02 13:12:11,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:11,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390363793] [2021-05-02 13:12:11,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390363793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:11,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767252688] [2021-05-02 13:12:11,553 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 13:12:11,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:12:11,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:11,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 13:12:11,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:11,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4477 backedges. 1870 proven. 1122 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2021-05-02 13:12:11,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767252688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:11,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:11,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2021-05-02 13:12:11,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103018576] [2021-05-02 13:12:11,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 13:12:11,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:11,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 13:12:11,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 13:12:11,853 INFO L87 Difference]: Start difference. First operand 190 states and 229 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:13,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:13,005 INFO L93 Difference]: Finished difference Result 310 states and 389 transitions. [2021-05-02 13:12:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 13:12:13,005 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2021-05-02 13:12:13,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:13,006 INFO L225 Difference]: With dead ends: 310 [2021-05-02 13:12:13,006 INFO L226 Difference]: Without dead ends: 192 [2021-05-02 13:12:13,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1461.0ms TimeCoverageRelationStatistics Valid=1927, Invalid=3185, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 13:12:13,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-02 13:12:13,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-05-02 13:12:13,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.213903743315508) internal successors, (227), 187 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 231 transitions. [2021-05-02 13:12:13,013 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 231 transitions. Word has length 189 [2021-05-02 13:12:13,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:13,013 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 231 transitions. [2021-05-02 13:12:13,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 231 transitions. [2021-05-02 13:12:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-05-02 13:12:13,014 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:13,014 INFO L523 BasicCegarLoop]: trace histogram [62, 34, 28, 28, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:13,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 13:12:13,229 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:13,229 INFO L82 PathProgramCache]: Analyzing trace with hash 996130398, now seen corresponding path program 33 times [2021-05-02 13:12:13,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:13,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314347197] [2021-05-02 13:12:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:13,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4600 backedges. 1925 proven. 1190 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2021-05-02 13:12:13,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:13,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314347197] [2021-05-02 13:12:13,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314347197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:13,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578635645] [2021-05-02 13:12:13,724 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 13:12:13,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-05-02 13:12:13,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:13,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 13:12:13,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:13,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,930 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 13:12:13,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:13,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4600 backedges. 1552 proven. 242 refuted. 0 times theorem prover too weak. 2806 trivial. 0 not checked. [2021-05-02 13:12:14,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578635645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:14,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:14,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 14] total 50 [2021-05-02 13:12:14,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539374769] [2021-05-02 13:12:14,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 13:12:14,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:14,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 13:12:14,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 13:12:14,362 INFO L87 Difference]: Start difference. First operand 192 states and 231 transitions. Second operand has 50 states, 50 states have (on average 2.72) internal successors, (136), 49 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:16,311 INFO L93 Difference]: Finished difference Result 318 states and 402 transitions. [2021-05-02 13:12:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 13:12:16,312 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.72) internal successors, (136), 49 states have internal predecessors, (136), 2 states have call successors, (4), 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 13:12:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:16,313 INFO L225 Difference]: With dead ends: 318 [2021-05-02 13:12:16,313 INFO L226 Difference]: Without dead ends: 200 [2021-05-02 13:12:16,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 2482.3ms TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 13:12:16,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-02 13:12:16,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2021-05-02 13:12:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.217616580310881) internal successors, (235), 193 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 13:12:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 239 transitions. [2021-05-02 13:12:16,320 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 239 transitions. Word has length 191 [2021-05-02 13:12:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:16,320 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 239 transitions. [2021-05-02 13:12:16,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.72) internal successors, (136), 49 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:16,320 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 239 transitions. [2021-05-02 13:12:16,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-05-02 13:12:16,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:16,321 INFO L523 BasicCegarLoop]: trace histogram [64, 35, 29, 29, 17, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:16,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 13:12:16,537 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:16,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:16,537 INFO L82 PathProgramCache]: Analyzing trace with hash -435170604, now seen corresponding path program 34 times [2021-05-02 13:12:16,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:16,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205554307] [2021-05-02 13:12:16,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:17,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4908 backedges. 2052 proven. 1260 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2021-05-02 13:12:17,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:17,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205554307] [2021-05-02 13:12:17,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205554307] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:17,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724974289] [2021-05-02 13:12:17,098 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 13:12:17,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:12:17,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:17,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 13:12:17,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:17,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4908 backedges. 2052 proven. 1260 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2021-05-02 13:12:17,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724974289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:17,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:17,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-05-02 13:12:17,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506125475] [2021-05-02 13:12:17,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 13:12:17,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:17,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 13:12:17,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 13:12:17,398 INFO L87 Difference]: Start difference. First operand 198 states and 239 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:18,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:18,707 INFO L93 Difference]: Finished difference Result 322 states and 405 transitions. [2021-05-02 13:12:18,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 13:12:18,708 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2021-05-02 13:12:18,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:18,709 INFO L225 Difference]: With dead ends: 322 [2021-05-02 13:12:18,709 INFO L226 Difference]: Without dead ends: 200 [2021-05-02 13:12:18,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1631.0ms TimeCoverageRelationStatistics Valid=2148, Invalid=3552, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 13:12:18,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-02 13:12:18,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-05-02 13:12:18,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.2153846153846153) internal successors, (237), 195 states have internal predecessors, (237), 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 13:12:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 241 transitions. [2021-05-02 13:12:18,716 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 241 transitions. Word has length 197 [2021-05-02 13:12:18,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:18,716 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 241 transitions. [2021-05-02 13:12:18,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:18,716 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 241 transitions. [2021-05-02 13:12:18,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-05-02 13:12:18,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:18,717 INFO L523 BasicCegarLoop]: trace histogram [65, 36, 29, 29, 17, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:18,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 13:12:18,936 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:18,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:18,936 INFO L82 PathProgramCache]: Analyzing trace with hash 909235761, now seen corresponding path program 35 times [2021-05-02 13:12:18,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:18,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243438722] [2021-05-02 13:12:18,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:19,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5037 backedges. 2109 proven. 1332 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2021-05-02 13:12:19,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:19,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243438722] [2021-05-02 13:12:19,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243438722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:19,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864366705] [2021-05-02 13:12:19,534 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 13:12:19,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-05-02 13:12:19,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:19,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:12:19,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:19,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5037 backedges. 3030 proven. 709 refuted. 0 times theorem prover too weak. 1298 trivial. 0 not checked. [2021-05-02 13:12:20,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864366705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:20,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:20,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 23] total 61 [2021-05-02 13:12:20,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33711492] [2021-05-02 13:12:20,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 13:12:20,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:20,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 13:12:20,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 13:12:20,571 INFO L87 Difference]: Start difference. First operand 200 states and 241 transitions. Second operand has 61 states, 61 states have (on average 2.7540983606557377) internal successors, (168), 60 states have internal predecessors, (168), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:23,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:23,280 INFO L93 Difference]: Finished difference Result 340 states and 431 transitions. [2021-05-02 13:12:23,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 13:12:23,280 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.7540983606557377) internal successors, (168), 60 states have internal predecessors, (168), 2 states have call successors, (4), 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 199 [2021-05-02 13:12:23,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:23,281 INFO L225 Difference]: With dead ends: 340 [2021-05-02 13:12:23,281 INFO L226 Difference]: Without dead ends: 218 [2021-05-02 13:12:23,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 3672.0ms TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 13:12:23,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-02 13:12:23,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-05-02 13:12:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.215962441314554) internal successors, (259), 213 states have internal predecessors, (259), 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 13:12:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 263 transitions. [2021-05-02 13:12:23,289 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 263 transitions. Word has length 199 [2021-05-02 13:12:23,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:23,289 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 263 transitions. [2021-05-02 13:12:23,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.7540983606557377) internal successors, (168), 60 states have internal predecessors, (168), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:23,289 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 263 transitions. [2021-05-02 13:12:23,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-05-02 13:12:23,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:23,290 INFO L523 BasicCegarLoop]: trace histogram [70, 37, 33, 33, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:23,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 13:12:23,505 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:23,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:23,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1136308566, now seen corresponding path program 36 times [2021-05-02 13:12:23,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:23,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570098378] [2021-05-02 13:12:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:24,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 2470 proven. 1406 refuted. 0 times theorem prover too weak. 2080 trivial. 0 not checked. [2021-05-02 13:12:24,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:24,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570098378] [2021-05-02 13:12:24,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570098378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:24,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049818444] [2021-05-02 13:12:24,329 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 13:12:24,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2021-05-02 13:12:24,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:24,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:12:24,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:24,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:24,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:25,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:25,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:25,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:25,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:25,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:25,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:25,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:25,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 1962 proven. 288 refuted. 0 times theorem prover too weak. 3706 trivial. 0 not checked. [2021-05-02 13:12:25,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049818444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:25,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:25,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 15] total 54 [2021-05-02 13:12:25,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804148768] [2021-05-02 13:12:25,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 13:12:25,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:25,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 13:12:25,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 13:12:25,191 INFO L87 Difference]: Start difference. First operand 218 states and 263 transitions. Second operand has 54 states, 54 states have (on average 2.7037037037037037) internal successors, (146), 53 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:27,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:27,668 INFO L93 Difference]: Finished difference Result 364 states and 460 transitions. [2021-05-02 13:12:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 13:12:27,669 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.7037037037037037) internal successors, (146), 53 states have internal predecessors, (146), 2 states have call successors, (4), 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 13:12:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:27,670 INFO L225 Difference]: With dead ends: 364 [2021-05-02 13:12:27,670 INFO L226 Difference]: Without dead ends: 226 [2021-05-02 13:12:27,671 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 3332.7ms TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 13:12:27,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-02 13:12:27,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2021-05-02 13:12:27,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.2191780821917808) internal successors, (267), 219 states have internal predecessors, (267), 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 13:12:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 271 transitions. [2021-05-02 13:12:27,678 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 271 transitions. Word has length 217 [2021-05-02 13:12:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:27,678 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 271 transitions. [2021-05-02 13:12:27,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.7037037037037037) internal successors, (146), 53 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 271 transitions. [2021-05-02 13:12:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-05-02 13:12:27,679 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:27,679 INFO L523 BasicCegarLoop]: trace histogram [72, 38, 34, 34, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:27,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 13:12:27,897 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:27,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1574707936, now seen corresponding path program 37 times [2021-05-02 13:12:27,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:27,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921915382] [2021-05-02 13:12:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:28,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6306 backedges. 2613 proven. 1482 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-05-02 13:12:28,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:28,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921915382] [2021-05-02 13:12:28,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921915382] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:28,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726077037] [2021-05-02 13:12:28,641 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 13:12:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:28,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 13:12:28,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:28,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6306 backedges. 2613 proven. 1482 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-05-02 13:12:28,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726077037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:28,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:28,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-05-02 13:12:28,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862734160] [2021-05-02 13:12:28,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 13:12:28,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:28,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 13:12:28,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 13:12:28,977 INFO L87 Difference]: Start difference. First operand 224 states and 271 transitions. Second operand has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:30,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:30,593 INFO L93 Difference]: Finished difference Result 368 states and 463 transitions. [2021-05-02 13:12:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 13:12:30,593 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2021-05-02 13:12:30,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:30,594 INFO L225 Difference]: With dead ends: 368 [2021-05-02 13:12:30,594 INFO L226 Difference]: Without dead ends: 226 [2021-05-02 13:12:30,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 2050.5ms TimeCoverageRelationStatistics Valid=2502, Invalid=4140, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 13:12:30,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-02 13:12:30,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2021-05-02 13:12:30,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.2171945701357465) internal successors, (269), 221 states have internal predecessors, (269), 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 13:12:30,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 273 transitions. [2021-05-02 13:12:30,601 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 273 transitions. Word has length 223 [2021-05-02 13:12:30,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:30,602 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 273 transitions. [2021-05-02 13:12:30,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:30,602 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 273 transitions. [2021-05-02 13:12:30,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-05-02 13:12:30,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:30,603 INFO L523 BasicCegarLoop]: trace histogram [73, 39, 34, 34, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:30,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:30,809 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:30,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:30,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1390183427, now seen corresponding path program 38 times [2021-05-02 13:12:30,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:30,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320279471] [2021-05-02 13:12:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:31,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6451 backedges. 2680 proven. 1560 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-05-02 13:12:31,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:31,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320279471] [2021-05-02 13:12:31,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320279471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:31,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194217010] [2021-05-02 13:12:31,553 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 13:12:31,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:12:31,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:31,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 13:12:31,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:31,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6451 backedges. 2680 proven. 1560 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-05-02 13:12:31,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194217010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:31,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:31,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2021-05-02 13:12:31,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416634687] [2021-05-02 13:12:31,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 13:12:31,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:31,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 13:12:31,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 13:12:31,922 INFO L87 Difference]: Start difference. First operand 226 states and 273 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:33,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:33,464 INFO L93 Difference]: Finished difference Result 370 states and 465 transitions. [2021-05-02 13:12:33,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 13:12:33,465 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2021-05-02 13:12:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:33,466 INFO L225 Difference]: With dead ends: 370 [2021-05-02 13:12:33,466 INFO L226 Difference]: Without dead ends: 228 [2021-05-02 13:12:33,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 2064.7ms TimeCoverageRelationStatistics Valid=2626, Invalid=4346, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 13:12:33,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-02 13:12:33,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2021-05-02 13:12:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.2152466367713004) internal successors, (271), 223 states have internal predecessors, (271), 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 13:12:33,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 275 transitions. [2021-05-02 13:12:33,473 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 275 transitions. Word has length 225 [2021-05-02 13:12:33,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:33,473 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 275 transitions. [2021-05-02 13:12:33,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:33,474 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 275 transitions. [2021-05-02 13:12:33,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-05-02 13:12:33,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:33,475 INFO L523 BasicCegarLoop]: trace histogram [74, 40, 34, 34, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:33,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:33,692 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:33,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:33,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1207501274, now seen corresponding path program 39 times [2021-05-02 13:12:33,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:33,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387066636] [2021-05-02 13:12:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:34,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6598 backedges. 2747 proven. 1640 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-05-02 13:12:34,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:34,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387066636] [2021-05-02 13:12:34,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387066636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:34,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092302024] [2021-05-02 13:12:34,403 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 13:12:34,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-02 13:12:34,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:34,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 13:12:34,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:34,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6598 backedges. 2200 proven. 338 refuted. 0 times theorem prover too weak. 4060 trivial. 0 not checked. [2021-05-02 13:12:35,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092302024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:35,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:35,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 16] total 58 [2021-05-02 13:12:35,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544559009] [2021-05-02 13:12:35,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 13:12:35,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:35,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 13:12:35,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 13:12:35,236 INFO L87 Difference]: Start difference. First operand 228 states and 275 transitions. Second operand has 58 states, 58 states have (on average 2.689655172413793) internal successors, (156), 57 states have internal predecessors, (156), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:37,668 INFO L93 Difference]: Finished difference Result 378 states and 478 transitions. [2021-05-02 13:12:37,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 13:12:37,669 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.689655172413793) internal successors, (156), 57 states have internal predecessors, (156), 2 states have call successors, (4), 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 13:12:37,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:37,670 INFO L225 Difference]: With dead ends: 378 [2021-05-02 13:12:37,670 INFO L226 Difference]: Without dead ends: 236 [2021-05-02 13:12:37,671 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 3305.6ms TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 13:12:37,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-02 13:12:37,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2021-05-02 13:12:37,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.2183406113537119) internal successors, (279), 229 states have internal predecessors, (279), 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 13:12:37,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 283 transitions. [2021-05-02 13:12:37,678 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 283 transitions. Word has length 227 [2021-05-02 13:12:37,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:37,678 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 283 transitions. [2021-05-02 13:12:37,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.689655172413793) internal successors, (156), 57 states have internal predecessors, (156), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:37,678 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 283 transitions. [2021-05-02 13:12:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-05-02 13:12:37,679 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:37,679 INFO L523 BasicCegarLoop]: trace histogram [76, 41, 35, 35, 21, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:37,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:37,885 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:37,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1127001552, now seen corresponding path program 40 times [2021-05-02 13:12:37,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:37,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369466620] [2021-05-02 13:12:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:38,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6966 backedges. 2898 proven. 1722 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2021-05-02 13:12:38,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:38,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369466620] [2021-05-02 13:12:38,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369466620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:38,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985718068] [2021-05-02 13:12:38,601 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 13:12:38,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:12:38,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:38,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 13:12:38,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:38,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6966 backedges. 2898 proven. 1722 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2021-05-02 13:12:38,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985718068] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:38,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:38,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-02 13:12:38,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928986563] [2021-05-02 13:12:38,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 13:12:38,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:38,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 13:12:38,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 13:12:38,968 INFO L87 Difference]: Start difference. First operand 234 states and 283 transitions. Second operand has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:40,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:40,559 INFO L93 Difference]: Finished difference Result 382 states and 481 transitions. [2021-05-02 13:12:40,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 13:12:40,559 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2021-05-02 13:12:40,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:40,560 INFO L225 Difference]: With dead ends: 382 [2021-05-02 13:12:40,560 INFO L226 Difference]: Without dead ends: 236 [2021-05-02 13:12:40,561 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 2073.3ms TimeCoverageRelationStatistics Valid=2883, Invalid=4773, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 13:12:40,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-02 13:12:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-05-02 13:12:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.2164502164502164) internal successors, (281), 231 states have internal predecessors, (281), 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 13:12:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 285 transitions. [2021-05-02 13:12:40,568 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 285 transitions. Word has length 233 [2021-05-02 13:12:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:40,568 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 285 transitions. [2021-05-02 13:12:40,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:40,568 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 285 transitions. [2021-05-02 13:12:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-05-02 13:12:40,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:40,569 INFO L523 BasicCegarLoop]: trace histogram [77, 42, 35, 35, 21, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:40,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 13:12:40,781 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:40,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:40,782 INFO L82 PathProgramCache]: Analyzing trace with hash -977205587, now seen corresponding path program 41 times [2021-05-02 13:12:40,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:40,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515102068] [2021-05-02 13:12:40,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:41,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7119 backedges. 2967 proven. 1806 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2021-05-02 13:12:41,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:41,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515102068] [2021-05-02 13:12:41,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515102068] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:41,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998946551] [2021-05-02 13:12:41,525 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 13:12:41,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2021-05-02 13:12:41,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:41,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 13:12:41,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:41,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7119 backedges. 4258 proven. 1041 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2021-05-02 13:12:42,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998946551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:42,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:42,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 27] total 71 [2021-05-02 13:12:42,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67867784] [2021-05-02 13:12:42,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 13:12:42,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:42,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 13:12:42,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 13:12:42,841 INFO L87 Difference]: Start difference. First operand 236 states and 285 transitions. Second operand has 71 states, 71 states have (on average 2.76056338028169) internal successors, (196), 70 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:46,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:46,293 INFO L93 Difference]: Finished difference Result 400 states and 507 transitions. [2021-05-02 13:12:46,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 13:12:46,294 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.76056338028169) internal successors, (196), 70 states have internal predecessors, (196), 2 states have call successors, (4), 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 235 [2021-05-02 13:12:46,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:46,294 INFO L225 Difference]: With dead ends: 400 [2021-05-02 13:12:46,294 INFO L226 Difference]: Without dead ends: 254 [2021-05-02 13:12:46,296 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 4730.7ms TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2021-05-02 13:12:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-02 13:12:46,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-05-02 13:12:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.216867469879518) internal successors, (303), 249 states have internal predecessors, (303), 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 13:12:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 307 transitions. [2021-05-02 13:12:46,303 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 307 transitions. Word has length 235 [2021-05-02 13:12:46,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:46,303 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 307 transitions. [2021-05-02 13:12:46,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.76056338028169) internal successors, (196), 70 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:46,303 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 307 transitions. [2021-05-02 13:12:46,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-05-02 13:12:46,304 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:46,304 INFO L523 BasicCegarLoop]: trace histogram [82, 43, 39, 39, 25, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:46,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:46,521 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:46,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:46,521 INFO L82 PathProgramCache]: Analyzing trace with hash 565478566, now seen corresponding path program 42 times [2021-05-02 13:12:46,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:46,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325785023] [2021-05-02 13:12:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:47,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8206 backedges. 3388 proven. 1892 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2021-05-02 13:12:47,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:47,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325785023] [2021-05-02 13:12:47,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325785023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:47,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130617523] [2021-05-02 13:12:47,309 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 13:12:47,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 59 check-sat command(s) [2021-05-02 13:12:47,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:47,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:12:47,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:47,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:47,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:47,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:47,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:47,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:47,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:47,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:47,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:47,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:47,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:47,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:47,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:47,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:47,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:47,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:47,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:47,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:47,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:48,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:48,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:48,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:48,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:48,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:48,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:48,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:48,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:48,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:48,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:48,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:48,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8206 backedges. 2682 proven. 392 refuted. 0 times theorem prover too weak. 5132 trivial. 0 not checked. [2021-05-02 13:12:48,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130617523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:48,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:48,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 17] total 62 [2021-05-02 13:12:48,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865683893] [2021-05-02 13:12:48,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 13:12:48,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:48,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 13:12:48,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 13:12:48,334 INFO L87 Difference]: Start difference. First operand 254 states and 307 transitions. Second operand has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 61 states have internal predecessors, (166), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:51,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:51,436 INFO L93 Difference]: Finished difference Result 424 states and 536 transitions. [2021-05-02 13:12:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 13:12:51,436 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 61 states have internal predecessors, (166), 2 states have call successors, (4), 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 13:12:51,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:51,437 INFO L225 Difference]: With dead ends: 424 [2021-05-02 13:12:51,437 INFO L226 Difference]: Without dead ends: 262 [2021-05-02 13:12:51,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 4054.5ms TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 13:12:51,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-02 13:12:51,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2021-05-02 13:12:51,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.219607843137255) internal successors, (311), 255 states have internal predecessors, (311), 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 13:12:51,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 315 transitions. [2021-05-02 13:12:51,446 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 315 transitions. Word has length 253 [2021-05-02 13:12:51,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:51,446 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 315 transitions. [2021-05-02 13:12:51,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 61 states have internal predecessors, (166), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:51,447 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 315 transitions. [2021-05-02 13:12:51,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-05-02 13:12:51,448 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:51,448 INFO L523 BasicCegarLoop]: trace histogram [84, 44, 40, 40, 25, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:51,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:51,661 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:51,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:51,661 INFO L82 PathProgramCache]: Analyzing trace with hash 179425372, now seen corresponding path program 43 times [2021-05-02 13:12:51,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:51,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052668546] [2021-05-02 13:12:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:52,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8616 backedges. 3555 proven. 1980 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-05-02 13:12:52,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:52,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052668546] [2021-05-02 13:12:52,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052668546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:52,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149462780] [2021-05-02 13:12:52,619 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 13:12:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:52,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 13:12:52,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:52,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,732 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 13:12:52,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,754 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 13:12:52,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,767 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 13:12:52,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,780 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 13:12:52,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,817 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 13:12:52,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,830 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 13:12:52,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,853 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 13:12:52,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:52,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8616 backedges. 3555 proven. 1980 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-05-02 13:12:53,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149462780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:53,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:53,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-02 13:12:53,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913802206] [2021-05-02 13:12:53,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 13:12:53,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:53,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 13:12:53,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 13:12:53,013 INFO L87 Difference]: Start difference. First operand 260 states and 315 transitions. Second operand has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:55,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:55,054 INFO L93 Difference]: Finished difference Result 428 states and 539 transitions. [2021-05-02 13:12:55,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 13:12:55,055 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2021-05-02 13:12:55,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:55,056 INFO L225 Difference]: With dead ends: 428 [2021-05-02 13:12:55,056 INFO L226 Difference]: Without dead ends: 262 [2021-05-02 13:12:55,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 2630.2ms TimeCoverageRelationStatistics Valid=3291, Invalid=5451, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 13:12:55,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-02 13:12:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2021-05-02 13:12:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.2178988326848248) internal successors, (313), 257 states have internal predecessors, (313), 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 13:12:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 317 transitions. [2021-05-02 13:12:55,064 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 317 transitions. Word has length 259 [2021-05-02 13:12:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:55,064 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 317 transitions. [2021-05-02 13:12:55,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 317 transitions. [2021-05-02 13:12:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-05-02 13:12:55,065 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:55,065 INFO L523 BasicCegarLoop]: trace histogram [85, 45, 40, 40, 25, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:55,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 13:12:55,283 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:55,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:55,283 INFO L82 PathProgramCache]: Analyzing trace with hash 352558841, now seen corresponding path program 44 times [2021-05-02 13:12:55,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:55,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913978324] [2021-05-02 13:12:55,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:56,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8785 backedges. 3634 proven. 2070 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-05-02 13:12:56,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:56,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913978324] [2021-05-02 13:12:56,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913978324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:56,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154109126] [2021-05-02 13:12:56,208 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 13:12:56,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:12:56,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:56,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 13:12:56,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:56,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8785 backedges. 3634 proven. 2070 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-05-02 13:12:56,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154109126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:56,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:56,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2021-05-02 13:12:56,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840305041] [2021-05-02 13:12:56,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 13:12:56,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:56,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 13:12:56,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 13:12:56,627 INFO L87 Difference]: Start difference. First operand 262 states and 317 transitions. Second operand has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 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 13:12:58,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:58,537 INFO L93 Difference]: Finished difference Result 430 states and 541 transitions. [2021-05-02 13:12:58,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 13:12:58,538 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 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 261 [2021-05-02 13:12:58,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:58,539 INFO L225 Difference]: With dead ends: 430 [2021-05-02 13:12:58,539 INFO L226 Difference]: Without dead ends: 264 [2021-05-02 13:12:58,540 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 2604.1ms TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 13:12:58,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-02 13:12:58,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2021-05-02 13:12:58,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.2162162162162162) internal successors, (315), 259 states have internal predecessors, (315), 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 13:12:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 319 transitions. [2021-05-02 13:12:58,547 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 319 transitions. Word has length 261 [2021-05-02 13:12:58,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:58,547 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 319 transitions. [2021-05-02 13:12:58,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 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 13:12:58,547 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 319 transitions. [2021-05-02 13:12:58,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-05-02 13:12:58,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:58,548 INFO L523 BasicCegarLoop]: trace histogram [86, 46, 40, 40, 25, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:58,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 13:12:58,750 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:58,751 INFO L82 PathProgramCache]: Analyzing trace with hash -769901994, now seen corresponding path program 45 times [2021-05-02 13:12:58,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:58,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969229374] [2021-05-02 13:12:58,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:59,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8956 backedges. 3713 proven. 2162 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-05-02 13:12:59,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:59,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969229374] [2021-05-02 13:12:59,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969229374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:59,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941541615] [2021-05-02 13:12:59,650 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 13:12:59,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-05-02 13:12:59,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:59,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 13:12:59,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:59,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8956 backedges. 2960 proven. 450 refuted. 0 times theorem prover too weak. 5546 trivial. 0 not checked. [2021-05-02 13:13:00,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941541615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:00,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:00,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 18] total 66 [2021-05-02 13:13:00,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146203586] [2021-05-02 13:13:00,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 13:13:00,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:00,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 13:13:00,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 13:13:00,695 INFO L87 Difference]: Start difference. First operand 264 states and 319 transitions. Second operand has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:03,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:03,829 INFO L93 Difference]: Finished difference Result 438 states and 554 transitions. [2021-05-02 13:13:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 13:13:03,830 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 2 states have call successors, (4), 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 13:13:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:03,831 INFO L225 Difference]: With dead ends: 438 [2021-05-02 13:13:03,831 INFO L226 Difference]: Without dead ends: 272 [2021-05-02 13:13:03,832 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 4250.0ms TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 13:13:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-02 13:13:03,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 270. [2021-05-02 13:13:03,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.2188679245283018) internal successors, (323), 265 states have internal predecessors, (323), 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 13:13:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 327 transitions. [2021-05-02 13:13:03,839 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 327 transitions. Word has length 263 [2021-05-02 13:13:03,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:03,839 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 327 transitions. [2021-05-02 13:13:03,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:03,839 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 327 transitions. [2021-05-02 13:13:03,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-05-02 13:13:03,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:03,841 INFO L523 BasicCegarLoop]: trace histogram [88, 47, 41, 41, 25, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:04,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 13:13:04,057 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:04,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1715192372, now seen corresponding path program 46 times [2021-05-02 13:13:04,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:04,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336184049] [2021-05-02 13:13:04,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:04,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 3888 proven. 2256 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2021-05-02 13:13:04,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:04,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336184049] [2021-05-02 13:13:04,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336184049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:04,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747157596] [2021-05-02 13:13:04,993 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 13:13:05,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:13:05,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:13:05,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 13:13:05,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:05,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:05,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 3888 proven. 2256 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2021-05-02 13:13:05,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747157596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:05,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:05,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-02 13:13:05,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524281535] [2021-05-02 13:13:05,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 13:13:05,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:05,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 13:13:05,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 13:13:05,392 INFO L87 Difference]: Start difference. First operand 270 states and 327 transitions. Second operand has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 51 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:07,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:07,433 INFO L93 Difference]: Finished difference Result 442 states and 557 transitions. [2021-05-02 13:13:07,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 13:13:07,433 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 51 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2021-05-02 13:13:07,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:07,434 INFO L225 Difference]: With dead ends: 442 [2021-05-02 13:13:07,434 INFO L226 Difference]: Without dead ends: 272 [2021-05-02 13:13:07,435 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 2637.0ms TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 13:13:07,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-02 13:13:07,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2021-05-02 13:13:07,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.2172284644194757) internal successors, (325), 267 states have internal predecessors, (325), 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 13:13:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 329 transitions. [2021-05-02 13:13:07,443 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 329 transitions. Word has length 269 [2021-05-02 13:13:07,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:07,443 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 329 transitions. [2021-05-02 13:13:07,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 51 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:07,443 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 329 transitions. [2021-05-02 13:13:07,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-05-02 13:13:07,444 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:07,444 INFO L523 BasicCegarLoop]: trace histogram [89, 48, 41, 41, 25, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:07,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:07,662 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:07,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:07,663 INFO L82 PathProgramCache]: Analyzing trace with hash 183381033, now seen corresponding path program 47 times [2021-05-02 13:13:07,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:07,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946513419] [2021-05-02 13:13:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:08,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9561 backedges. 3969 proven. 2352 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2021-05-02 13:13:08,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:08,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946513419] [2021-05-02 13:13:08,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946513419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:08,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980926897] [2021-05-02 13:13:08,631 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 13:13:08,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 59 check-sat command(s) [2021-05-02 13:13:08,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:13:08,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:13:08,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:08,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:08,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:08,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:08,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:08,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:08,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:08,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:08,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:09,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9561 backedges. 5694 proven. 1437 refuted. 0 times theorem prover too weak. 2430 trivial. 0 not checked. [2021-05-02 13:13:10,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980926897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:10,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:10,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 31] total 81 [2021-05-02 13:13:10,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657541173] [2021-05-02 13:13:10,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 13:13:10,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:10,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 13:13:10,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 13:13:10,460 INFO L87 Difference]: Start difference. First operand 272 states and 329 transitions. Second operand has 81 states, 81 states have (on average 2.765432098765432) internal successors, (224), 80 states have internal predecessors, (224), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:15,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:15,045 INFO L93 Difference]: Finished difference Result 460 states and 583 transitions. [2021-05-02 13:13:15,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 13:13:15,045 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.765432098765432) internal successors, (224), 80 states have internal predecessors, (224), 2 states have call successors, (4), 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 271 [2021-05-02 13:13:15,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:15,046 INFO L225 Difference]: With dead ends: 460 [2021-05-02 13:13:15,046 INFO L226 Difference]: Without dead ends: 290 [2021-05-02 13:13:15,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3051 ImplicationChecksByTransitivity, 6365.5ms TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2021-05-02 13:13:15,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-05-02 13:13:15,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2021-05-02 13:13:15,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.2175438596491228) internal successors, (347), 285 states have internal predecessors, (347), 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 13:13:15,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 351 transitions. [2021-05-02 13:13:15,055 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 351 transitions. Word has length 271 [2021-05-02 13:13:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:15,055 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 351 transitions. [2021-05-02 13:13:15,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.765432098765432) internal successors, (224), 80 states have internal predecessors, (224), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 351 transitions. [2021-05-02 13:13:15,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-05-02 13:13:15,056 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:15,057 INFO L523 BasicCegarLoop]: trace histogram [94, 49, 45, 45, 29, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:15,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:15,257 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:15,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:15,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1593643102, now seen corresponding path program 48 times [2021-05-02 13:13:15,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:15,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848081761] [2021-05-02 13:13:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:16,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 4450 proven. 2450 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-05-02 13:13:16,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:16,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848081761] [2021-05-02 13:13:16,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848081761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:16,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130798914] [2021-05-02 13:13:16,305 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 13:13:16,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-05-02 13:13:16,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:13:16,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:13:16,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:16,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 3514 proven. 512 refuted. 0 times theorem prover too weak. 6790 trivial. 0 not checked. [2021-05-02 13:13:17,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130798914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:17,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:17,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 19] total 70 [2021-05-02 13:13:17,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6105187] [2021-05-02 13:13:17,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 13:13:17,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:17,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 13:13:17,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 13:13:17,615 INFO L87 Difference]: Start difference. First operand 290 states and 351 transitions. Second operand has 70 states, 70 states have (on average 2.657142857142857) internal successors, (186), 69 states have internal predecessors, (186), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:21,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:21,573 INFO L93 Difference]: Finished difference Result 484 states and 612 transitions. [2021-05-02 13:13:21,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 13:13:21,573 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.657142857142857) internal successors, (186), 69 states have internal predecessors, (186), 2 states have call successors, (4), 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 289 [2021-05-02 13:13:21,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:21,574 INFO L225 Difference]: With dead ends: 484 [2021-05-02 13:13:21,574 INFO L226 Difference]: Without dead ends: 298 [2021-05-02 13:13:21,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2260 ImplicationChecksByTransitivity, 5182.2ms TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 13:13:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-02 13:13:21,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 296. [2021-05-02 13:13:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.2199312714776633) internal successors, (355), 291 states have internal predecessors, (355), 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 13:13:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 359 transitions. [2021-05-02 13:13:21,584 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 359 transitions. Word has length 289 [2021-05-02 13:13:21,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:21,585 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 359 transitions. [2021-05-02 13:13:21,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.657142857142857) internal successors, (186), 69 states have internal predecessors, (186), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 359 transitions. [2021-05-02 13:13:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-05-02 13:13:21,586 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:21,586 INFO L523 BasicCegarLoop]: trace histogram [96, 50, 46, 46, 29, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:21,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:21,801 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:21,801 INFO L82 PathProgramCache]: Analyzing trace with hash 187134680, now seen corresponding path program 49 times [2021-05-02 13:13:21,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:21,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892207314] [2021-05-02 13:13:21,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:22,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11286 backedges. 4641 proven. 2550 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2021-05-02 13:13:22,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:22,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892207314] [2021-05-02 13:13:22,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892207314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:22,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019464113] [2021-05-02 13:13:22,906 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 13:13:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:22,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 13:13:23,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:23,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11286 backedges. 4641 proven. 2550 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2021-05-02 13:13:23,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019464113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:23,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:23,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2021-05-02 13:13:23,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803593402] [2021-05-02 13:13:23,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 13:13:23,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:23,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 13:13:23,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 13:13:23,364 INFO L87 Difference]: Start difference. First operand 296 states and 359 transitions. Second operand has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:25,749 INFO L93 Difference]: Finished difference Result 488 states and 615 transitions. [2021-05-02 13:13:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 13:13:25,750 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 295 [2021-05-02 13:13:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:25,751 INFO L225 Difference]: With dead ends: 488 [2021-05-02 13:13:25,751 INFO L226 Difference]: Without dead ends: 298 [2021-05-02 13:13:25,752 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 3102.2ms TimeCoverageRelationStatistics Valid=4188, Invalid=6942, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 13:13:25,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-02 13:13:25,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2021-05-02 13:13:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.2184300341296928) internal successors, (357), 293 states have internal predecessors, (357), 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 13:13:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 361 transitions. [2021-05-02 13:13:25,761 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 361 transitions. Word has length 295 [2021-05-02 13:13:25,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:25,761 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 361 transitions. [2021-05-02 13:13:25,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:25,761 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 361 transitions. [2021-05-02 13:13:25,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-05-02 13:13:25,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:25,763 INFO L523 BasicCegarLoop]: trace histogram [97, 51, 46, 46, 29, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:25,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:25,969 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:25,969 INFO L82 PathProgramCache]: Analyzing trace with hash 454489845, now seen corresponding path program 50 times [2021-05-02 13:13:25,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:25,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787783658] [2021-05-02 13:13:25,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:27,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11479 backedges. 4732 proven. 2652 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2021-05-02 13:13:27,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:27,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787783658] [2021-05-02 13:13:27,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787783658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:27,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846119982] [2021-05-02 13:13:27,146 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 13:13:27,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:13:27,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:13:27,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 13:13:27,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:27,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11479 backedges. 4732 proven. 2652 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2021-05-02 13:13:27,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846119982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:27,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:27,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2021-05-02 13:13:27,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345652619] [2021-05-02 13:13:27,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 13:13:27,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:27,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 13:13:27,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 13:13:27,658 INFO L87 Difference]: Start difference. First operand 298 states and 361 transitions. Second operand has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 55 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:30,225 INFO L93 Difference]: Finished difference Result 490 states and 617 transitions. [2021-05-02 13:13:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 13:13:30,225 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 55 states have internal predecessors, (120), 2 states have call successors, (4), 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 297 [2021-05-02 13:13:30,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:30,227 INFO L225 Difference]: With dead ends: 490 [2021-05-02 13:13:30,227 INFO L226 Difference]: Without dead ends: 300 [2021-05-02 13:13:30,228 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 3294.8ms TimeCoverageRelationStatistics Valid=4348, Invalid=7208, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 13:13:30,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-02 13:13:30,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2021-05-02 13:13:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.2169491525423728) internal successors, (359), 295 states have internal predecessors, (359), 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 13:13:30,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 363 transitions. [2021-05-02 13:13:30,236 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 363 transitions. Word has length 297 [2021-05-02 13:13:30,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:30,236 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 363 transitions. [2021-05-02 13:13:30,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 55 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:30,236 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 363 transitions. [2021-05-02 13:13:30,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-05-02 13:13:30,238 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:30,238 INFO L523 BasicCegarLoop]: trace histogram [98, 52, 46, 46, 29, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:30,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-02 13:13:30,461 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:30,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:30,461 INFO L82 PathProgramCache]: Analyzing trace with hash -315234350, now seen corresponding path program 51 times [2021-05-02 13:13:30,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:30,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234842013] [2021-05-02 13:13:30,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:31,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11674 backedges. 4823 proven. 2756 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2021-05-02 13:13:31,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:31,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234842013] [2021-05-02 13:13:31,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234842013] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:31,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658157717] [2021-05-02 13:13:31,660 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 13:13:31,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-05-02 13:13:31,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:13:31,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 13:13:31,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:32,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:32,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11674 backedges. 3832 proven. 578 refuted. 0 times theorem prover too weak. 7264 trivial. 0 not checked. [2021-05-02 13:13:33,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658157717] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:33,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:33,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 20] total 74 [2021-05-02 13:13:33,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440583992] [2021-05-02 13:13:33,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 13:13:33,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:33,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 13:13:33,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 13:13:33,014 INFO L87 Difference]: Start difference. First operand 300 states and 363 transitions. Second operand has 74 states, 74 states have (on average 2.6486486486486487) internal successors, (196), 73 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:37,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:37,014 INFO L93 Difference]: Finished difference Result 498 states and 630 transitions. [2021-05-02 13:13:37,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 13:13:37,014 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.6486486486486487) internal successors, (196), 73 states have internal predecessors, (196), 2 states have call successors, (4), 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 299 [2021-05-02 13:13:37,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:37,015 INFO L225 Difference]: With dead ends: 498 [2021-05-02 13:13:37,015 INFO L226 Difference]: Without dead ends: 308 [2021-05-02 13:13:37,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2537 ImplicationChecksByTransitivity, 5533.3ms TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2021-05-02 13:13:37,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-02 13:13:37,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 306. [2021-05-02 13:13:37,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 301 states have (on average 1.2192691029900333) internal successors, (367), 301 states have internal predecessors, (367), 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 13:13:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 371 transitions. [2021-05-02 13:13:37,024 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 371 transitions. Word has length 299 [2021-05-02 13:13:37,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:37,024 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 371 transitions. [2021-05-02 13:13:37,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.6486486486486487) internal successors, (196), 73 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:37,024 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 371 transitions. [2021-05-02 13:13:37,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-05-02 13:13:37,025 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:37,026 INFO L523 BasicCegarLoop]: trace histogram [100, 53, 47, 47, 29, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:37,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:37,235 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:37,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:37,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1436351800, now seen corresponding path program 52 times [2021-05-02 13:13:37,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:37,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950232915] [2021-05-02 13:13:37,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:38,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12162 backedges. 5022 proven. 2862 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2021-05-02 13:13:38,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:38,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950232915] [2021-05-02 13:13:38,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950232915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:38,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148356738] [2021-05-02 13:13:38,461 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 13:13:38,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:13:38,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:13:38,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 13:13:38,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:38,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12162 backedges. 5022 proven. 2862 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2021-05-02 13:13:38,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148356738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:38,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:38,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 58 [2021-05-02 13:13:38,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168160300] [2021-05-02 13:13:38,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 13:13:38,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:38,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 13:13:38,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 13:13:38,921 INFO L87 Difference]: Start difference. First operand 306 states and 371 transitions. Second operand has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:41,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:41,365 INFO L93 Difference]: Finished difference Result 502 states and 633 transitions. [2021-05-02 13:13:41,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 13:13:41,366 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 2 states have call successors, (4), 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 305 [2021-05-02 13:13:41,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:41,367 INFO L225 Difference]: With dead ends: 502 [2021-05-02 13:13:41,367 INFO L226 Difference]: Without dead ends: 308 [2021-05-02 13:13:41,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 3320.7ms TimeCoverageRelationStatistics Valid=4677, Invalid=7755, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 13:13:41,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-02 13:13:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-05-02 13:13:41,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 303 states have (on average 1.2178217821782178) internal successors, (369), 303 states have internal predecessors, (369), 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 13:13:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 373 transitions. [2021-05-02 13:13:41,376 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 373 transitions. Word has length 305 [2021-05-02 13:13:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:41,376 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 373 transitions. [2021-05-02 13:13:41,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 373 transitions. [2021-05-02 13:13:41,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-05-02 13:13:41,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:41,377 INFO L523 BasicCegarLoop]: trace histogram [101, 54, 47, 47, 29, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:41,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-02 13:13:41,586 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:41,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:41,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1515862363, now seen corresponding path program 53 times [2021-05-02 13:13:41,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:41,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995123050] [2021-05-02 13:13:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:42,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12363 backedges. 5115 proven. 2970 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2021-05-02 13:13:42,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:42,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995123050] [2021-05-02 13:13:42,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995123050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:42,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747771208] [2021-05-02 13:13:42,803 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 13:13:42,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2021-05-02 13:13:42,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:13:42,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 13:13:42,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:43,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:43,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:44,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12363 backedges. 7338 proven. 1897 refuted. 0 times theorem prover too weak. 3128 trivial. 0 not checked. [2021-05-02 13:13:45,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747771208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:45,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:45,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 35] total 91 [2021-05-02 13:13:45,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833315837] [2021-05-02 13:13:45,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 13:13:45,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:45,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 13:13:45,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 13:13:45,051 INFO L87 Difference]: Start difference. First operand 308 states and 373 transitions. Second operand has 91 states, 91 states have (on average 2.769230769230769) internal successors, (252), 90 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 13:13:50,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:50,629 INFO L93 Difference]: Finished difference Result 520 states and 659 transitions. [2021-05-02 13:13:50,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 13:13:50,629 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.769230769230769) internal successors, (252), 90 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 307 [2021-05-02 13:13:50,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:50,631 INFO L225 Difference]: With dead ends: 520 [2021-05-02 13:13:50,631 INFO L226 Difference]: Without dead ends: 326 [2021-05-02 13:13:50,632 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3882 ImplicationChecksByTransitivity, 7913.8ms TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2021-05-02 13:13:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-02 13:13:50,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2021-05-02 13:13:50,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 321 states have (on average 1.2180685358255452) internal successors, (391), 321 states have internal predecessors, (391), 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 13:13:50,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 395 transitions. [2021-05-02 13:13:50,640 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 395 transitions. Word has length 307 [2021-05-02 13:13:50,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:50,640 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 395 transitions. [2021-05-02 13:13:50,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.769230769230769) internal successors, (252), 90 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 13:13:50,641 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 395 transitions. [2021-05-02 13:13:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-05-02 13:13:50,642 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:50,642 INFO L523 BasicCegarLoop]: trace histogram [106, 55, 51, 51, 33, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:50,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-02 13:13:50,852 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:50,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:50,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1065545826, now seen corresponding path program 54 times [2021-05-02 13:13:50,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:50,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360669353] [2021-05-02 13:13:50,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:52,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13786 backedges. 5656 proven. 3080 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2021-05-02 13:13:52,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:52,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360669353] [2021-05-02 13:13:52,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360669353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:52,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127032104] [2021-05-02 13:13:52,109 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 13:13:52,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 75 check-sat command(s) [2021-05-02 13:13:52,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:13:52,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:13:52,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:52,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:52,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:52,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:52,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:52,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:52,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:52,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:52,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:52,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:52,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:52,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:52,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:52,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:52,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:52,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:52,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:52,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:52,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13786 backedges. 4458 proven. 648 refuted. 0 times theorem prover too weak. 8680 trivial. 0 not checked. [2021-05-02 13:13:53,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127032104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:53,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:53,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 21] total 78 [2021-05-02 13:13:53,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554303302] [2021-05-02 13:13:53,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 13:13:53,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:53,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 13:13:53,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 13:13:53,588 INFO L87 Difference]: Start difference. First operand 326 states and 395 transitions. Second operand has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:58,186 INFO L93 Difference]: Finished difference Result 544 states and 688 transitions. [2021-05-02 13:13:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 13:13:58,186 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 2 states have call successors, (4), 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 325 [2021-05-02 13:13:58,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:58,188 INFO L225 Difference]: With dead ends: 544 [2021-05-02 13:13:58,188 INFO L226 Difference]: Without dead ends: 334 [2021-05-02 13:13:58,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2830 ImplicationChecksByTransitivity, 6135.6ms TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2021-05-02 13:13:58,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-02 13:13:58,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2021-05-02 13:13:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 327 states have (on average 1.2201834862385321) internal successors, (399), 327 states have internal predecessors, (399), 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 13:13:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 403 transitions. [2021-05-02 13:13:58,198 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 403 transitions. Word has length 325 [2021-05-02 13:13:58,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:58,198 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 403 transitions. [2021-05-02 13:13:58,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:58,199 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 403 transitions. [2021-05-02 13:13:58,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-05-02 13:13:58,200 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:58,200 INFO L523 BasicCegarLoop]: trace histogram [108, 56, 52, 52, 33, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:58,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:58,409 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:58,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:58,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1431729580, now seen corresponding path program 55 times [2021-05-02 13:13:58,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:58,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127502627] [2021-05-02 13:13:58,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:59,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14316 backedges. 5871 proven. 3192 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-05-02 13:13:59,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:59,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127502627] [2021-05-02 13:13:59,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127502627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:59,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004278572] [2021-05-02 13:13:59,838 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 13:13:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:59,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 13:13:59,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:59,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:59,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:59,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:59,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:59,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:59,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:59,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:59,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:59,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:59,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:59,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:59,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 14316 backedges. 5871 proven. 3192 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-05-02 13:14:00,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004278572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:00,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:14:00,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59] total 61 [2021-05-02 13:14:00,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814144142] [2021-05-02 13:14:00,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 13:14:00,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:14:00,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 13:14:00,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 13:14:00,433 INFO L87 Difference]: Start difference. First operand 332 states and 403 transitions. Second operand has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 60 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:14:03,189 INFO L93 Difference]: Finished difference Result 548 states and 691 transitions. [2021-05-02 13:14:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 13:14:03,189 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 60 states have internal predecessors, (130), 2 states have call successors, (4), 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 331 [2021-05-02 13:14:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:14:03,190 INFO L225 Difference]: With dead ends: 548 [2021-05-02 13:14:03,190 INFO L226 Difference]: Without dead ends: 334 [2021-05-02 13:14:03,192 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 3887.5ms TimeCoverageRelationStatistics Valid=5193, Invalid=8613, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 13:14:03,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-02 13:14:03,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2021-05-02 13:14:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 329 states have (on average 1.2188449848024316) internal successors, (401), 329 states have internal predecessors, (401), 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 13:14:03,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 405 transitions. [2021-05-02 13:14:03,200 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 405 transitions. Word has length 331 [2021-05-02 13:14:03,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:14:03,201 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 405 transitions. [2021-05-02 13:14:03,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 60 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:03,201 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 405 transitions. [2021-05-02 13:14:03,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-05-02 13:14:03,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:14:03,202 INFO L523 BasicCegarLoop]: trace histogram [109, 57, 52, 52, 33, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:14:03,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-02 13:14:03,417 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:14:03,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:14:03,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1915356145, now seen corresponding path program 56 times [2021-05-02 13:14:03,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:14:03,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9953667] [2021-05-02 13:14:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:14:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:04,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:14:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 14533 backedges. 5974 proven. 3306 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-05-02 13:14:04,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:14:04,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9953667] [2021-05-02 13:14:04,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9953667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:04,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301167392] [2021-05-02 13:14:04,825 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 13:14:04,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:14:04,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:14:04,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 13:14:04,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:14:04,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:04,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 14533 backedges. 5974 proven. 3306 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-05-02 13:14:05,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301167392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:05,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:14:05,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 62 [2021-05-02 13:14:05,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397257875] [2021-05-02 13:14:05,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 13:14:05,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:14:05,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 13:14:05,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 13:14:05,360 INFO L87 Difference]: Start difference. First operand 334 states and 405 transitions. Second operand has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:08,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:14:08,116 INFO L93 Difference]: Finished difference Result 550 states and 693 transitions. [2021-05-02 13:14:08,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 13:14:08,117 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 2 states have call successors, (4), 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 333 [2021-05-02 13:14:08,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:14:08,118 INFO L225 Difference]: With dead ends: 550 [2021-05-02 13:14:08,118 INFO L226 Difference]: Without dead ends: 336 [2021-05-02 13:14:08,120 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1878 ImplicationChecksByTransitivity, 3843.5ms TimeCoverageRelationStatistics Valid=5371, Invalid=8909, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 13:14:08,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-05-02 13:14:08,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2021-05-02 13:14:08,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 331 states have (on average 1.2175226586102719) internal successors, (403), 331 states have internal predecessors, (403), 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 13:14:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 407 transitions. [2021-05-02 13:14:08,136 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 407 transitions. Word has length 333 [2021-05-02 13:14:08,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:14:08,136 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 407 transitions. [2021-05-02 13:14:08,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:08,136 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 407 transitions. [2021-05-02 13:14:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-05-02 13:14:08,137 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:14:08,137 INFO L523 BasicCegarLoop]: trace histogram [110, 58, 52, 52, 33, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:14:08,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:14:08,353 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:14:08,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:14:08,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1534233166, now seen corresponding path program 57 times [2021-05-02 13:14:08,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:14:08,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728159684] [2021-05-02 13:14:08,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:14:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:09,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:14:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 14752 backedges. 6077 proven. 3422 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-05-02 13:14:09,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:14:09,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728159684] [2021-05-02 13:14:09,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728159684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:09,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601120932] [2021-05-02 13:14:09,824 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 13:14:09,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-05-02 13:14:09,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:14:09,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 13:14:09,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:14:10,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:10,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:11,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:11,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:11,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:11,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:11,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:11,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:11,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:11,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:11,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:11,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:11,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:11,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:11,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:11,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 14752 backedges. 4816 proven. 722 refuted. 0 times theorem prover too weak. 9214 trivial. 0 not checked. [2021-05-02 13:14:11,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601120932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:11,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:14:11,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 22] total 82 [2021-05-02 13:14:11,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763315657] [2021-05-02 13:14:11,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 13:14:11,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:14:11,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 13:14:11,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 13:14:11,479 INFO L87 Difference]: Start difference. First operand 336 states and 407 transitions. Second operand has 82 states, 82 states have (on average 2.6341463414634148) internal successors, (216), 81 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 13:14:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:14:16,610 INFO L93 Difference]: Finished difference Result 558 states and 706 transitions. [2021-05-02 13:14:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 13:14:16,610 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.6341463414634148) internal successors, (216), 81 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 335 [2021-05-02 13:14:16,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:14:16,612 INFO L225 Difference]: With dead ends: 558 [2021-05-02 13:14:16,612 INFO L226 Difference]: Without dead ends: 344 [2021-05-02 13:14:16,613 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3139 ImplicationChecksByTransitivity, 7009.5ms TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2021-05-02 13:14:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-02 13:14:16,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 342. [2021-05-02 13:14:16,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 337 states have (on average 1.2195845697329377) internal successors, (411), 337 states have internal predecessors, (411), 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 13:14:16,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 415 transitions. [2021-05-02 13:14:16,622 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 415 transitions. Word has length 335 [2021-05-02 13:14:16,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:14:16,622 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 415 transitions. [2021-05-02 13:14:16,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.6341463414634148) internal successors, (216), 81 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 13:14:16,622 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 415 transitions. [2021-05-02 13:14:16,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-05-02 13:14:16,623 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:14:16,623 INFO L523 BasicCegarLoop]: trace histogram [112, 59, 53, 53, 33, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:14:16,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-05-02 13:14:16,824 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:14:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:14:16,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1414888644, now seen corresponding path program 58 times [2021-05-02 13:14:16,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:14:16,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815700416] [2021-05-02 13:14:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:14:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:18,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:14:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 15300 backedges. 6300 proven. 3540 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2021-05-02 13:14:18,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:14:18,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815700416] [2021-05-02 13:14:18,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815700416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:18,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157673256] [2021-05-02 13:14:18,312 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 13:14:18,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:14:18,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:14:18,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-02 13:14:18,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:14:18,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 15300 backedges. 6300 proven. 3540 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2021-05-02 13:14:18,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157673256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:18,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:14:18,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 64 [2021-05-02 13:14:18,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846522204] [2021-05-02 13:14:18,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 13:14:18,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:14:18,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 13:14:18,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 13:14:18,879 INFO L87 Difference]: Start difference. First operand 342 states and 415 transitions. Second operand has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:14:21,830 INFO L93 Difference]: Finished difference Result 562 states and 709 transitions. [2021-05-02 13:14:21,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 13:14:21,831 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 2 states have call successors, (4), 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 341 [2021-05-02 13:14:21,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:14:21,832 INFO L225 Difference]: With dead ends: 562 [2021-05-02 13:14:21,832 INFO L226 Difference]: Without dead ends: 344 [2021-05-02 13:14:21,834 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 4089.4ms TimeCoverageRelationStatistics Valid=5736, Invalid=9516, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 13:14:21,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-02 13:14:21,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2021-05-02 13:14:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 339 states have (on average 1.2182890855457227) internal successors, (413), 339 states have internal predecessors, (413), 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 13:14:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 417 transitions. [2021-05-02 13:14:21,842 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 417 transitions. Word has length 341 [2021-05-02 13:14:21,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:14:21,842 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 417 transitions. [2021-05-02 13:14:21,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:21,842 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 417 transitions. [2021-05-02 13:14:21,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2021-05-02 13:14:21,853 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:14:21,853 INFO L523 BasicCegarLoop]: trace histogram [113, 60, 53, 53, 33, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:14:22,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:14:22,061 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:14:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:14:22,061 INFO L82 PathProgramCache]: Analyzing trace with hash 613701153, now seen corresponding path program 59 times [2021-05-02 13:14:22,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:14:22,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4123829] [2021-05-02 13:14:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:14:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:23,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:14:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15525 backedges. 6405 proven. 3660 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2021-05-02 13:14:23,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:14:23,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4123829] [2021-05-02 13:14:23,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4123829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:23,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190104943] [2021-05-02 13:14:23,597 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 13:14:23,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 75 check-sat command(s) [2021-05-02 13:14:23,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:14:23,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 13:14:23,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:14:23,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:23,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:23,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:23,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:23,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:23,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:24,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:25,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15525 backedges. 9190 proven. 2421 refuted. 0 times theorem prover too weak. 3914 trivial. 0 not checked. [2021-05-02 13:14:26,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190104943] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:26,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:14:26,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 39] total 101 [2021-05-02 13:14:26,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875091310] [2021-05-02 13:14:26,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-02 13:14:26,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:14:26,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-02 13:14:26,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 13:14:26,427 INFO L87 Difference]: Start difference. First operand 344 states and 417 transitions. Second operand has 101 states, 101 states have (on average 2.772277227722772) internal successors, (280), 100 states have internal predecessors, (280), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:33,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:14:33,343 INFO L93 Difference]: Finished difference Result 580 states and 735 transitions. [2021-05-02 13:14:33,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-02 13:14:33,344 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.772277227722772) internal successors, (280), 100 states have internal predecessors, (280), 2 states have call successors, (4), 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 343 [2021-05-02 13:14:33,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:14:33,345 INFO L225 Difference]: With dead ends: 580 [2021-05-02 13:14:33,345 INFO L226 Difference]: Without dead ends: 362 [2021-05-02 13:14:33,348 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4813 ImplicationChecksByTransitivity, 9962.4ms TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2021-05-02 13:14:33,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-02 13:14:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2021-05-02 13:14:33,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 357 states have (on average 1.218487394957983) internal successors, (435), 357 states have internal predecessors, (435), 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 13:14:33,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 439 transitions. [2021-05-02 13:14:33,359 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 439 transitions. Word has length 343 [2021-05-02 13:14:33,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:14:33,359 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 439 transitions. [2021-05-02 13:14:33,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 101 states have (on average 2.772277227722772) internal successors, (280), 100 states have internal predecessors, (280), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:33,359 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 439 transitions. [2021-05-02 13:14:33,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-05-02 13:14:33,361 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:14:33,361 INFO L523 BasicCegarLoop]: trace histogram [118, 61, 57, 57, 37, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:14:33,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-05-02 13:14:33,577 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:14:33,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:14:33,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1160733850, now seen corresponding path program 60 times [2021-05-02 13:14:33,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:14:33,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719594137] [2021-05-02 13:14:33,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:14:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:35,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:14:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17116 backedges. 7006 proven. 3782 refuted. 0 times theorem prover too weak. 6328 trivial. 0 not checked. [2021-05-02 13:14:35,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:14:35,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719594137] [2021-05-02 13:14:35,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719594137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:35,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617646633] [2021-05-02 13:14:35,186 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 13:14:35,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2021-05-02 13:14:35,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:14:35,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:14:35,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:14:35,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:35,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:35,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:35,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:35,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:35,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:35,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:35,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:35,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:35,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:35,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:35,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17116 backedges. 5514 proven. 800 refuted. 0 times theorem prover too weak. 10802 trivial. 0 not checked. [2021-05-02 13:14:36,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617646633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:36,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:14:36,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 23] total 86 [2021-05-02 13:14:36,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941781698] [2021-05-02 13:14:36,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 13:14:36,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:14:36,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 13:14:36,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 13:14:36,972 INFO L87 Difference]: Start difference. First operand 362 states and 439 transitions. Second operand has 86 states, 86 states have (on average 2.627906976744186) internal successors, (226), 85 states have internal predecessors, (226), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:42,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:14:42,208 INFO L93 Difference]: Finished difference Result 604 states and 764 transitions. [2021-05-02 13:14:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 13:14:42,208 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.627906976744186) internal successors, (226), 85 states have internal predecessors, (226), 2 states have call successors, (4), 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 361 [2021-05-02 13:14:42,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:14:42,209 INFO L225 Difference]: With dead ends: 604 [2021-05-02 13:14:42,209 INFO L226 Difference]: Without dead ends: 370 [2021-05-02 13:14:42,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3464 ImplicationChecksByTransitivity, 7351.6ms TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2021-05-02 13:14:42,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-05-02 13:14:42,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 368. [2021-05-02 13:14:42,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 363 states have (on average 1.2203856749311295) internal successors, (443), 363 states have internal predecessors, (443), 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 13:14:42,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 447 transitions. [2021-05-02 13:14:42,222 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 447 transitions. Word has length 361 [2021-05-02 13:14:42,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:14:42,222 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 447 transitions. [2021-05-02 13:14:42,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.627906976744186) internal successors, (226), 85 states have internal predecessors, (226), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:42,223 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 447 transitions. [2021-05-02 13:14:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-05-02 13:14:42,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:14:42,225 INFO L523 BasicCegarLoop]: trace histogram [120, 62, 58, 58, 37, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:14:42,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:14:42,441 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:14:42,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:14:42,443 INFO L82 PathProgramCache]: Analyzing trace with hash -479947056, now seen corresponding path program 61 times [2021-05-02 13:14:42,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:14:42,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12809548] [2021-05-02 13:14:42,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:14:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:44,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:14:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17706 backedges. 7245 proven. 3906 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2021-05-02 13:14:44,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:14:44,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12809548] [2021-05-02 13:14:44,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12809548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:44,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515739985] [2021-05-02 13:14:44,152 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 13:14:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:44,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-02 13:14:44,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:14:44,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17706 backedges. 7245 proven. 3906 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2021-05-02 13:14:44,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515739985] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:44,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:14:44,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65] total 67 [2021-05-02 13:14:44,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133683515] [2021-05-02 13:14:44,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 13:14:44,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:14:44,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 13:14:44,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 13:14:44,811 INFO L87 Difference]: Start difference. First operand 368 states and 447 transitions. Second operand has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 66 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:48,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:14:48,447 INFO L93 Difference]: Finished difference Result 608 states and 767 transitions. [2021-05-02 13:14:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 13:14:48,448 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 66 states have internal predecessors, (142), 2 states have call successors, (4), 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 367 [2021-05-02 13:14:48,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:14:48,449 INFO L225 Difference]: With dead ends: 608 [2021-05-02 13:14:48,449 INFO L226 Difference]: Without dead ends: 370 [2021-05-02 13:14:48,451 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 4882.9ms TimeCoverageRelationStatistics Valid=6306, Invalid=10464, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 13:14:48,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-05-02 13:14:48,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2021-05-02 13:14:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.2191780821917808) internal successors, (445), 365 states have internal predecessors, (445), 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 13:14:48,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 449 transitions. [2021-05-02 13:14:48,459 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 449 transitions. Word has length 367 [2021-05-02 13:14:48,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:14:48,460 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 449 transitions. [2021-05-02 13:14:48,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 66 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:48,460 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 449 transitions. [2021-05-02 13:14:48,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-05-02 13:14:48,461 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:14:48,461 INFO L523 BasicCegarLoop]: trace histogram [121, 63, 58, 58, 37, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:14:48,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-02 13:14:48,670 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:14:48,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:14:48,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1271481837, now seen corresponding path program 62 times [2021-05-02 13:14:48,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:14:48,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532286805] [2021-05-02 13:14:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:14:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:50,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:14:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 17947 backedges. 7360 proven. 4032 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2021-05-02 13:14:50,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:14:50,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532286805] [2021-05-02 13:14:50,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532286805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:50,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711787281] [2021-05-02 13:14:50,394 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 13:14:50,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:14:50,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:14:50,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-02 13:14:50,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:14:50,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:50,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17947 backedges. 7360 proven. 4032 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2021-05-02 13:14:51,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711787281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:51,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:14:51,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66] total 68 [2021-05-02 13:14:51,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740961492] [2021-05-02 13:14:51,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 13:14:51,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:14:51,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 13:14:51,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 13:14:51,003 INFO L87 Difference]: Start difference. First operand 370 states and 449 transitions. Second operand has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 67 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 13:14:54,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:14:54,347 INFO L93 Difference]: Finished difference Result 610 states and 769 transitions. [2021-05-02 13:14:54,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 13:14:54,347 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 67 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 369 [2021-05-02 13:14:54,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:14:54,349 INFO L225 Difference]: With dead ends: 610 [2021-05-02 13:14:54,349 INFO L226 Difference]: Without dead ends: 372 [2021-05-02 13:14:54,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2265 ImplicationChecksByTransitivity, 4682.9ms TimeCoverageRelationStatistics Valid=6502, Invalid=10790, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 13:14:54,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-05-02 13:14:54,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2021-05-02 13:14:54,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 367 states have (on average 1.2179836512261581) internal successors, (447), 367 states have internal predecessors, (447), 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 13:14:54,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 451 transitions. [2021-05-02 13:14:54,359 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 451 transitions. Word has length 369 [2021-05-02 13:14:54,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:14:54,359 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 451 transitions. [2021-05-02 13:14:54,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 67 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 13:14:54,360 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 451 transitions. [2021-05-02 13:14:54,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-05-02 13:14:54,361 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:14:54,361 INFO L523 BasicCegarLoop]: trace histogram [122, 64, 58, 58, 37, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:14:54,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:14:54,563 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:14:54,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:14:54,563 INFO L82 PathProgramCache]: Analyzing trace with hash 767467978, now seen corresponding path program 63 times [2021-05-02 13:14:54,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:14:54,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228273163] [2021-05-02 13:14:54,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:14:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:56,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:14:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18190 backedges. 7475 proven. 4160 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2021-05-02 13:14:56,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:14:56,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228273163] [2021-05-02 13:14:56,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228273163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:56,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443384885] [2021-05-02 13:14:56,330 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 13:14:56,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2021-05-02 13:14:56,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:14:56,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 13:14:56,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:14:56,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:56,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:56,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:56,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:56,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:56,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:56,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:56,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:56,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:56,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:57,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:58,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:58,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:58,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:58,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18190 backedges. 5912 proven. 882 refuted. 0 times theorem prover too weak. 11396 trivial. 0 not checked. [2021-05-02 13:14:58,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443384885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:58,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:14:58,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 24] total 90 [2021-05-02 13:14:58,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025822560] [2021-05-02 13:14:58,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 13:14:58,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:14:58,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 13:14:58,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 13:14:58,235 INFO L87 Difference]: Start difference. First operand 372 states and 451 transitions. Second operand has 90 states, 90 states have (on average 2.6222222222222222) internal successors, (236), 89 states have internal predecessors, (236), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:04,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:04,756 INFO L93 Difference]: Finished difference Result 618 states and 782 transitions. [2021-05-02 13:15:04,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 13:15:04,757 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.6222222222222222) internal successors, (236), 89 states have internal predecessors, (236), 2 states have call successors, (4), 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 371 [2021-05-02 13:15:04,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:04,758 INFO L225 Difference]: With dead ends: 618 [2021-05-02 13:15:04,759 INFO L226 Difference]: Without dead ends: 380 [2021-05-02 13:15:04,760 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3805 ImplicationChecksByTransitivity, 8758.2ms TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2021-05-02 13:15:04,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-02 13:15:04,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 378. [2021-05-02 13:15:04,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 373 states have (on average 1.2198391420911527) internal successors, (455), 373 states have internal predecessors, (455), 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 13:15:04,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 459 transitions. [2021-05-02 13:15:04,769 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 459 transitions. Word has length 371 [2021-05-02 13:15:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:04,769 INFO L480 AbstractCegarLoop]: Abstraction has 378 states and 459 transitions. [2021-05-02 13:15:04,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.6222222222222222) internal successors, (236), 89 states have internal predecessors, (236), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:04,770 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 459 transitions. [2021-05-02 13:15:04,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-05-02 13:15:04,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:04,771 INFO L523 BasicCegarLoop]: trace histogram [124, 65, 59, 59, 37, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:04,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-02 13:15:04,972 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:04,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:04,973 INFO L82 PathProgramCache]: Analyzing trace with hash 900213696, now seen corresponding path program 64 times [2021-05-02 13:15:04,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:04,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692658006] [2021-05-02 13:15:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:06,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18798 backedges. 7722 proven. 4290 refuted. 0 times theorem prover too weak. 6786 trivial. 0 not checked. [2021-05-02 13:15:06,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:06,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692658006] [2021-05-02 13:15:06,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692658006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:06,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622246848] [2021-05-02 13:15:06,990 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 13:15:07,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:15:07,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:07,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 13:15:07,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:07,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18798 backedges. 7722 proven. 4290 refuted. 0 times theorem prover too weak. 6786 trivial. 0 not checked. [2021-05-02 13:15:07,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622246848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:07,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:07,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68] total 70 [2021-05-02 13:15:07,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038816917] [2021-05-02 13:15:07,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 13:15:07,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:07,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 13:15:07,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 13:15:07,737 INFO L87 Difference]: Start difference. First operand 378 states and 459 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:12,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:12,062 INFO L93 Difference]: Finished difference Result 622 states and 785 transitions. [2021-05-02 13:15:12,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 13:15:12,062 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 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 377 [2021-05-02 13:15:12,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:12,064 INFO L225 Difference]: With dead ends: 622 [2021-05-02 13:15:12,064 INFO L226 Difference]: Without dead ends: 380 [2021-05-02 13:15:12,065 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 5808.4ms TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 13:15:12,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-02 13:15:12,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2021-05-02 13:15:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 375 states have (on average 1.2186666666666666) internal successors, (457), 375 states have internal predecessors, (457), 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 13:15:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 461 transitions. [2021-05-02 13:15:12,074 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 461 transitions. Word has length 377 [2021-05-02 13:15:12,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:12,074 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 461 transitions. [2021-05-02 13:15:12,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:12,075 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 461 transitions. [2021-05-02 13:15:12,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-05-02 13:15:12,076 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:12,076 INFO L523 BasicCegarLoop]: trace histogram [125, 66, 59, 59, 37, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:12,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-02 13:15:12,278 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:12,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:12,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1524213091, now seen corresponding path program 65 times [2021-05-02 13:15:12,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:12,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896138354] [2021-05-02 13:15:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:14,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 19047 backedges. 7839 proven. 4422 refuted. 0 times theorem prover too weak. 6786 trivial. 0 not checked. [2021-05-02 13:15:14,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:14,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896138354] [2021-05-02 13:15:14,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896138354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:14,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131157860] [2021-05-02 13:15:14,299 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 13:15:14,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 83 check-sat command(s) [2021-05-02 13:15:14,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:14,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 13:15:14,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:14,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:14,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:14,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:14,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:14,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:14,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:14,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:14,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:14,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:14,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:14,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:14,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:14,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:14,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:15,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:16,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 19047 backedges. 11250 proven. 3009 refuted. 0 times theorem prover too weak. 4788 trivial. 0 not checked. [2021-05-02 13:15:17,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131157860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:17,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:17,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 43] total 111 [2021-05-02 13:15:17,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86569047] [2021-05-02 13:15:17,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 111 states [2021-05-02 13:15:17,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:17,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-05-02 13:15:17,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 13:15:17,949 INFO L87 Difference]: Start difference. First operand 380 states and 461 transitions. Second operand has 111 states, 111 states have (on average 2.774774774774775) internal successors, (308), 110 states have internal predecessors, (308), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:26,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:26,397 INFO L93 Difference]: Finished difference Result 640 states and 811 transitions. [2021-05-02 13:15:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-02 13:15:26,398 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.774774774774775) internal successors, (308), 110 states have internal predecessors, (308), 2 states have call successors, (4), 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 379 [2021-05-02 13:15:26,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:26,399 INFO L225 Difference]: With dead ends: 640 [2021-05-02 13:15:26,399 INFO L226 Difference]: Without dead ends: 398 [2021-05-02 13:15:26,402 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5844 ImplicationChecksByTransitivity, 12514.4ms TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2021-05-02 13:15:26,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-05-02 13:15:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2021-05-02 13:15:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 393 states have (on average 1.2188295165394403) internal successors, (479), 393 states have internal predecessors, (479), 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 13:15:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 483 transitions. [2021-05-02 13:15:26,412 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 483 transitions. Word has length 379 [2021-05-02 13:15:26,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:26,412 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 483 transitions. [2021-05-02 13:15:26,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 111 states, 111 states have (on average 2.774774774774775) internal successors, (308), 110 states have internal predecessors, (308), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:26,412 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 483 transitions. [2021-05-02 13:15:26,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-05-02 13:15:26,414 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:26,414 INFO L523 BasicCegarLoop]: trace histogram [130, 67, 63, 63, 41, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:26,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-02 13:15:26,619 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:26,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:26,620 INFO L82 PathProgramCache]: Analyzing trace with hash -756650346, now seen corresponding path program 66 times [2021-05-02 13:15:26,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:26,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208493124] [2021-05-02 13:15:26,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:28,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20806 backedges. 8500 proven. 4556 refuted. 0 times theorem prover too weak. 7750 trivial. 0 not checked. [2021-05-02 13:15:28,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:28,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208493124] [2021-05-02 13:15:28,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208493124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:28,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819358068] [2021-05-02 13:15:28,711 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 13:15:28,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2021-05-02 13:15:28,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:28,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 13:15:28,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:29,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20806 backedges. 6682 proven. 968 refuted. 0 times theorem prover too weak. 13156 trivial. 0 not checked. [2021-05-02 13:15:30,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819358068] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:30,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:30,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 25] total 94 [2021-05-02 13:15:30,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098096889] [2021-05-02 13:15:30,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 13:15:30,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:30,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 13:15:30,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 13:15:30,890 INFO L87 Difference]: Start difference. First operand 398 states and 483 transitions. Second operand has 94 states, 94 states have (on average 2.617021276595745) internal successors, (246), 93 states have internal predecessors, (246), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:37,730 INFO L93 Difference]: Finished difference Result 664 states and 840 transitions. [2021-05-02 13:15:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-02 13:15:37,731 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.617021276595745) internal successors, (246), 93 states have internal predecessors, (246), 2 states have call successors, (4), 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 397 [2021-05-02 13:15:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:37,732 INFO L225 Difference]: With dead ends: 664 [2021-05-02 13:15:37,732 INFO L226 Difference]: Without dead ends: 406 [2021-05-02 13:15:37,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4162 ImplicationChecksByTransitivity, 9482.2ms TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2021-05-02 13:15:37,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-02 13:15:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 404. [2021-05-02 13:15:37,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 399 states have (on average 1.2205513784461153) internal successors, (487), 399 states have internal predecessors, (487), 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 13:15:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 491 transitions. [2021-05-02 13:15:37,743 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 491 transitions. Word has length 397 [2021-05-02 13:15:37,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:37,743 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 491 transitions. [2021-05-02 13:15:37,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.617021276595745) internal successors, (246), 93 states have internal predecessors, (246), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:37,743 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 491 transitions. [2021-05-02 13:15:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-05-02 13:15:37,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:37,745 INFO L523 BasicCegarLoop]: trace histogram [132, 68, 64, 64, 41, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:37,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:37,945 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:37,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:37,946 INFO L82 PathProgramCache]: Analyzing trace with hash -29026228, now seen corresponding path program 67 times [2021-05-02 13:15:37,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:37,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289504707] [2021-05-02 13:15:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:39,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 21456 backedges. 8763 proven. 4692 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2021-05-02 13:15:39,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:39,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289504707] [2021-05-02 13:15:39,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289504707] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:39,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926852290] [2021-05-02 13:15:39,921 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 13:15:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:40,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 13:15:40,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:40,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 21456 backedges. 8763 proven. 4692 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2021-05-02 13:15:40,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926852290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:40,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:40,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71] total 73 [2021-05-02 13:15:40,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47642508] [2021-05-02 13:15:40,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 13:15:40,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:40,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 13:15:40,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 13:15:40,570 INFO L87 Difference]: Start difference. First operand 404 states and 491 transitions. Second operand has 73 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 72 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:44,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:44,289 INFO L93 Difference]: Finished difference Result 668 states and 843 transitions. [2021-05-02 13:15:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 13:15:44,290 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 72 states have internal predecessors, (154), 2 states have call successors, (4), 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 403 [2021-05-02 13:15:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:44,291 INFO L225 Difference]: With dead ends: 668 [2021-05-02 13:15:44,291 INFO L226 Difference]: Without dead ends: 406 [2021-05-02 13:15:44,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 5302.5ms TimeCoverageRelationStatistics Valid=7527, Invalid=12495, Unknown=0, NotChecked=0, Total=20022 [2021-05-02 13:15:44,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-02 13:15:44,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2021-05-02 13:15:44,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 401 states have (on average 1.2194513715710724) internal successors, (489), 401 states have internal predecessors, (489), 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 13:15:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 493 transitions. [2021-05-02 13:15:44,301 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 493 transitions. Word has length 403 [2021-05-02 13:15:44,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:44,301 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 493 transitions. [2021-05-02 13:15:44,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 72 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:44,301 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 493 transitions. [2021-05-02 13:15:44,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-05-02 13:15:44,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:44,303 INFO L523 BasicCegarLoop]: trace histogram [133, 69, 64, 64, 41, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:44,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:44,504 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:44,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:44,504 INFO L82 PathProgramCache]: Analyzing trace with hash -129942295, now seen corresponding path program 68 times [2021-05-02 13:15:44,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:44,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371842488] [2021-05-02 13:15:44,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:46,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 21721 backedges. 8890 proven. 4830 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2021-05-02 13:15:46,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:46,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371842488] [2021-05-02 13:15:46,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371842488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:46,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470259354] [2021-05-02 13:15:46,528 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 13:15:46,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:15:46,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:46,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-02 13:15:46,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:46,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:46,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 21721 backedges. 8890 proven. 4830 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2021-05-02 13:15:47,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470259354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:47,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:47,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72] total 74 [2021-05-02 13:15:47,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893157481] [2021-05-02 13:15:47,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 13:15:47,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:47,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 13:15:47,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 13:15:47,284 INFO L87 Difference]: Start difference. First operand 406 states and 493 transitions. Second operand has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:51,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:51,298 INFO L93 Difference]: Finished difference Result 670 states and 845 transitions. [2021-05-02 13:15:51,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 13:15:51,298 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 2 states have call successors, (4), 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 405 [2021-05-02 13:15:51,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:51,300 INFO L225 Difference]: With dead ends: 670 [2021-05-02 13:15:51,300 INFO L226 Difference]: Without dead ends: 408 [2021-05-02 13:15:51,301 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2688 ImplicationChecksByTransitivity, 5588.6ms TimeCoverageRelationStatistics Valid=7741, Invalid=12851, Unknown=0, NotChecked=0, Total=20592 [2021-05-02 13:15:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-02 13:15:51,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2021-05-02 13:15:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 403 states have (on average 1.218362282878412) internal successors, (491), 403 states have internal predecessors, (491), 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 13:15:51,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 495 transitions. [2021-05-02 13:15:51,310 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 495 transitions. Word has length 405 [2021-05-02 13:15:51,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:51,310 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 495 transitions. [2021-05-02 13:15:51,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:51,310 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 495 transitions. [2021-05-02 13:15:51,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-05-02 13:15:51,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:51,312 INFO L523 BasicCegarLoop]: trace histogram [134, 70, 64, 64, 41, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:51,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:51,513 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:51,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:51,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1673965126, now seen corresponding path program 69 times [2021-05-02 13:15:51,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:51,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130327173] [2021-05-02 13:15:51,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:53,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 21988 backedges. 9017 proven. 4970 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2021-05-02 13:15:53,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:53,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130327173] [2021-05-02 13:15:53,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130327173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:53,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872079583] [2021-05-02 13:15:53,725 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 13:15:53,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-05-02 13:15:53,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:53,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:15:53,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:54,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:55,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21988 backedges. 7120 proven. 1058 refuted. 0 times theorem prover too weak. 13810 trivial. 0 not checked. [2021-05-02 13:15:56,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872079583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:56,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:56,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 26] total 98 [2021-05-02 13:15:56,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092502770] [2021-05-02 13:15:56,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 13:15:56,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:56,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 13:15:56,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 13:15:56,244 INFO L87 Difference]: Start difference. First operand 408 states and 495 transitions. Second operand has 98 states, 98 states have (on average 2.6122448979591835) internal successors, (256), 97 states have internal predecessors, (256), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:16:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:03,228 INFO L93 Difference]: Finished difference Result 678 states and 858 transitions. [2021-05-02 13:16:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 13:16:03,229 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.6122448979591835) internal successors, (256), 97 states have internal predecessors, (256), 2 states have call successors, (4), 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 407 [2021-05-02 13:16:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:03,230 INFO L225 Difference]: With dead ends: 678 [2021-05-02 13:16:03,231 INFO L226 Difference]: Without dead ends: 416 [2021-05-02 13:16:03,232 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4535 ImplicationChecksByTransitivity, 10213.2ms TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2021-05-02 13:16:03,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-05-02 13:16:03,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 414. [2021-05-02 13:16:03,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 409 states have (on average 1.2200488997555012) internal successors, (499), 409 states have internal predecessors, (499), 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 13:16:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 503 transitions. [2021-05-02 13:16:03,241 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 503 transitions. Word has length 407 [2021-05-02 13:16:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:03,241 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 503 transitions. [2021-05-02 13:16:03,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.6122448979591835) internal successors, (256), 97 states have internal predecessors, (256), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:16:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 503 transitions. [2021-05-02 13:16:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2021-05-02 13:16:03,243 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:03,243 INFO L523 BasicCegarLoop]: trace histogram [136, 71, 65, 65, 41, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:03,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-05-02 13:16:03,457 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:03,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:03,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1260883900, now seen corresponding path program 70 times [2021-05-02 13:16:03,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:03,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724959910] [2021-05-02 13:16:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:05,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 22656 backedges. 9288 proven. 5112 refuted. 0 times theorem prover too weak. 8256 trivial. 0 not checked. [2021-05-02 13:16:05,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:05,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724959910] [2021-05-02 13:16:05,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724959910] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:05,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118776434] [2021-05-02 13:16:05,628 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 13:16:05,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:16:05,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:05,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-02 13:16:05,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:05,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 22656 backedges. 9288 proven. 5112 refuted. 0 times theorem prover too weak. 8256 trivial. 0 not checked. [2021-05-02 13:16:06,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118776434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:06,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:06,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74] total 76 [2021-05-02 13:16:06,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648730251] [2021-05-02 13:16:06,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 13:16:06,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:06,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 13:16:06,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 13:16:06,310 INFO L87 Difference]: Start difference. First operand 414 states and 503 transitions. Second operand has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 75 states have internal predecessors, (160), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:16:10,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:10,436 INFO L93 Difference]: Finished difference Result 682 states and 861 transitions. [2021-05-02 13:16:10,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 13:16:10,436 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 75 states have internal predecessors, (160), 2 states have call successors, (4), 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 413 [2021-05-02 13:16:10,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:10,437 INFO L225 Difference]: With dead ends: 682 [2021-05-02 13:16:10,437 INFO L226 Difference]: Without dead ends: 416 [2021-05-02 13:16:10,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2837 ImplicationChecksByTransitivity, 5901.5ms TimeCoverageRelationStatistics Valid=8178, Invalid=13578, Unknown=0, NotChecked=0, Total=21756 [2021-05-02 13:16:10,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-05-02 13:16:10,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2021-05-02 13:16:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 411 states have (on average 1.218978102189781) internal successors, (501), 411 states have internal predecessors, (501), 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 13:16:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 505 transitions. [2021-05-02 13:16:10,447 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 505 transitions. Word has length 413 [2021-05-02 13:16:10,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:10,447 INFO L480 AbstractCegarLoop]: Abstraction has 416 states and 505 transitions. [2021-05-02 13:16:10,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 75 states have internal predecessors, (160), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:16:10,447 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 505 transitions. [2021-05-02 13:16:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2021-05-02 13:16:10,448 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:10,449 INFO L523 BasicCegarLoop]: trace histogram [137, 72, 65, 65, 41, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:10,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:10,665 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:10,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:10,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1938314265, now seen corresponding path program 71 times [2021-05-02 13:16:10,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:10,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578963695] [2021-05-02 13:16:10,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:12,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 22929 backedges. 9417 proven. 5256 refuted. 0 times theorem prover too weak. 8256 trivial. 0 not checked. [2021-05-02 13:16:12,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:12,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578963695] [2021-05-02 13:16:12,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578963695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:12,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945425293] [2021-05-02 13:16:12,861 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 13:16:12,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2021-05-02 13:16:12,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:12,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 13:16:12,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:13,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:13,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:15,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 22929 backedges. 13518 proven. 3661 refuted. 0 times theorem prover too weak. 5750 trivial. 0 not checked. [2021-05-02 13:16:16,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945425293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:16,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:16,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 47] total 121 [2021-05-02 13:16:16,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372421251] [2021-05-02 13:16:16,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states [2021-05-02 13:16:16,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:16,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-05-02 13:16:16,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 13:16:16,950 INFO L87 Difference]: Start difference. First operand 416 states and 505 transitions. Second operand has 121 states, 121 states have (on average 2.7768595041322315) internal successors, (336), 120 states have internal predecessors, (336), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:16:26,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:26,608 INFO L93 Difference]: Finished difference Result 700 states and 887 transitions. [2021-05-02 13:16:26,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-05-02 13:16:26,608 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.7768595041322315) internal successors, (336), 120 states have internal predecessors, (336), 2 states have call successors, (4), 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 415 [2021-05-02 13:16:26,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:26,609 INFO L225 Difference]: With dead ends: 700 [2021-05-02 13:16:26,609 INFO L226 Difference]: Without dead ends: 434 [2021-05-02 13:16:26,612 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6975 ImplicationChecksByTransitivity, 14232.8ms TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2021-05-02 13:16:26,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-05-02 13:16:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2021-05-02 13:16:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 429 states have (on average 1.219114219114219) internal successors, (523), 429 states have internal predecessors, (523), 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 13:16:26,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 527 transitions. [2021-05-02 13:16:26,620 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 527 transitions. Word has length 415 [2021-05-02 13:16:26,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:26,620 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 527 transitions. [2021-05-02 13:16:26,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 121 states, 121 states have (on average 2.7768595041322315) internal successors, (336), 120 states have internal predecessors, (336), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:16:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 527 transitions. [2021-05-02 13:16:26,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-05-02 13:16:26,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:26,622 INFO L523 BasicCegarLoop]: trace histogram [142, 73, 69, 69, 45, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:26,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:26,823 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:26,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:26,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1943097966, now seen corresponding path program 72 times [2021-05-02 13:16:26,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:26,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378091673] [2021-05-02 13:16:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:29,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 24856 backedges. 10138 proven. 5402 refuted. 0 times theorem prover too weak. 9316 trivial. 0 not checked. [2021-05-02 13:16:29,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:29,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378091673] [2021-05-02 13:16:29,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378091673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:29,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097911020] [2021-05-02 13:16:29,100 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 13:16:29,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 99 check-sat command(s) [2021-05-02 13:16:29,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:29,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 13:16:29,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:29,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:30,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 24856 backedges. 7962 proven. 1152 refuted. 0 times theorem prover too weak. 15742 trivial. 0 not checked. [2021-05-02 13:16:31,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097911020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:31,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:31,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 27] total 102 [2021-05-02 13:16:31,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865267317] [2021-05-02 13:16:31,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-02 13:16:31,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:31,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-02 13:16:31,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 13:16:31,912 INFO L87 Difference]: Start difference. First operand 434 states and 527 transitions. Second operand has 102 states, 102 states have (on average 2.607843137254902) internal successors, (266), 101 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 13:16:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:39,776 INFO L93 Difference]: Finished difference Result 724 states and 916 transitions. [2021-05-02 13:16:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 13:16:39,777 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.607843137254902) internal successors, (266), 101 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 433 [2021-05-02 13:16:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:39,778 INFO L225 Difference]: With dead ends: 724 [2021-05-02 13:16:39,778 INFO L226 Difference]: Without dead ends: 442 [2021-05-02 13:16:39,780 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4924 ImplicationChecksByTransitivity, 11234.9ms TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2021-05-02 13:16:39,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-05-02 13:16:39,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 440. [2021-05-02 13:16:39,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.2206896551724138) internal successors, (531), 435 states have internal predecessors, (531), 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 13:16:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 535 transitions. [2021-05-02 13:16:39,789 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 535 transitions. Word has length 433 [2021-05-02 13:16:39,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:39,789 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 535 transitions. [2021-05-02 13:16:39,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.607843137254902) internal successors, (266), 101 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 13:16:39,789 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 535 transitions. [2021-05-02 13:16:39,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-05-02 13:16:39,791 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:39,791 INFO L523 BasicCegarLoop]: trace histogram [144, 74, 70, 70, 45, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:39,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:39,993 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:39,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:39,993 INFO L82 PathProgramCache]: Analyzing trace with hash 855084744, now seen corresponding path program 73 times [2021-05-02 13:16:39,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:39,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046124744] [2021-05-02 13:16:39,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:42,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 25566 backedges. 10425 proven. 5550 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2021-05-02 13:16:42,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:42,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046124744] [2021-05-02 13:16:42,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046124744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:42,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658665859] [2021-05-02 13:16:42,705 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 13:16:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:42,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-02 13:16:42,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:42,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:42,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 25566 backedges. 10425 proven. 5550 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2021-05-02 13:16:43,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658665859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:43,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:43,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77] total 79 [2021-05-02 13:16:43,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748644193] [2021-05-02 13:16:43,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 13:16:43,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:43,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 13:16:43,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 13:16:43,547 INFO L87 Difference]: Start difference. First operand 440 states and 535 transitions. Second operand has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 78 states have internal predecessors, (166), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:16:48,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:48,929 INFO L93 Difference]: Finished difference Result 728 states and 919 transitions. [2021-05-02 13:16:48,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 13:16:48,930 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 78 states have internal predecessors, (166), 2 states have call successors, (4), 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 439 [2021-05-02 13:16:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:48,931 INFO L225 Difference]: With dead ends: 728 [2021-05-02 13:16:48,931 INFO L226 Difference]: Without dead ends: 442 [2021-05-02 13:16:48,932 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3068 ImplicationChecksByTransitivity, 7552.6ms TimeCoverageRelationStatistics Valid=8856, Invalid=14706, Unknown=0, NotChecked=0, Total=23562 [2021-05-02 13:16:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-05-02 13:16:48,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-05-02 13:16:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 437 states have (on average 1.2196796338672768) internal successors, (533), 437 states have internal predecessors, (533), 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 13:16:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 537 transitions. [2021-05-02 13:16:48,942 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 537 transitions. Word has length 439 [2021-05-02 13:16:48,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:48,942 INFO L480 AbstractCegarLoop]: Abstraction has 442 states and 537 transitions. [2021-05-02 13:16:48,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 78 states have internal predecessors, (166), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:16:48,942 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 537 transitions. [2021-05-02 13:16:48,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2021-05-02 13:16:48,944 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:48,944 INFO L523 BasicCegarLoop]: trace histogram [145, 75, 70, 70, 45, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:49,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-02 13:16:49,145 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:49,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:49,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2036438811, now seen corresponding path program 74 times [2021-05-02 13:16:49,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:49,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716458864] [2021-05-02 13:16:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:52,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 25855 backedges. 10564 proven. 5700 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2021-05-02 13:16:52,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:52,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716458864] [2021-05-02 13:16:52,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716458864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:52,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555319168] [2021-05-02 13:16:52,005 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 13:16:52,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:16:52,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:52,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 77 conjunts are in the unsatisfiable core [2021-05-02 13:16:52,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:52,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 25855 backedges. 10564 proven. 5700 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2021-05-02 13:16:52,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555319168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:52,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:52,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78] total 80 [2021-05-02 13:16:52,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472946797] [2021-05-02 13:16:52,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 13:16:52,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:52,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 13:16:52,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 13:16:52,867 INFO L87 Difference]: Start difference. First operand 442 states and 537 transitions. Second operand has 80 states, 80 states have (on average 2.1) internal successors, (168), 79 states have internal predecessors, (168), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:16:58,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:58,306 INFO L93 Difference]: Finished difference Result 730 states and 921 transitions. [2021-05-02 13:16:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 13:16:58,307 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1) internal successors, (168), 79 states have internal predecessors, (168), 2 states have call successors, (4), 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 441 [2021-05-02 13:16:58,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:58,308 INFO L225 Difference]: With dead ends: 730 [2021-05-02 13:16:58,308 INFO L226 Difference]: Without dead ends: 444 [2021-05-02 13:16:58,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3147 ImplicationChecksByTransitivity, 7742.6ms TimeCoverageRelationStatistics Valid=9088, Invalid=15092, Unknown=0, NotChecked=0, Total=24180 [2021-05-02 13:16:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-05-02 13:16:58,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2021-05-02 13:16:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 439 states have (on average 1.2186788154897494) internal successors, (535), 439 states have internal predecessors, (535), 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 13:16:58,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 539 transitions. [2021-05-02 13:16:58,319 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 539 transitions. Word has length 441 [2021-05-02 13:16:58,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:58,319 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 539 transitions. [2021-05-02 13:16:58,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 2.1) internal successors, (168), 79 states have internal predecessors, (168), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:16:58,319 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 539 transitions. [2021-05-02 13:16:58,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-05-02 13:16:58,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:58,321 INFO L523 BasicCegarLoop]: trace histogram [146, 76, 70, 70, 45, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:58,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:58,521 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:58,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:58,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1946734654, now seen corresponding path program 75 times [2021-05-02 13:16:58,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:58,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012122151] [2021-05-02 13:16:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:01,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 26146 backedges. 10703 proven. 5852 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2021-05-02 13:17:01,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:01,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012122151] [2021-05-02 13:17:01,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012122151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:01,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670633578] [2021-05-02 13:17:01,405 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 13:17:01,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-05-02 13:17:01,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:17:01,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 13:17:01,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:01,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:01,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:02,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 26146 backedges. 8440 proven. 1250 refuted. 0 times theorem prover too weak. 16456 trivial. 0 not checked. [2021-05-02 13:17:04,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670633578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:04,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:04,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 28] total 106 [2021-05-02 13:17:04,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330619826] [2021-05-02 13:17:04,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-02 13:17:04,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:04,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-02 13:17:04,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 13:17:04,018 INFO L87 Difference]: Start difference. First operand 444 states and 539 transitions. Second operand has 106 states, 106 states have (on average 2.6037735849056602) internal successors, (276), 105 states have internal predecessors, (276), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:17:11,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:11,652 INFO L93 Difference]: Finished difference Result 738 states and 934 transitions. [2021-05-02 13:17:11,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-02 13:17:11,653 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.6037735849056602) internal successors, (276), 105 states have internal predecessors, (276), 2 states have call successors, (4), 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 443 [2021-05-02 13:17:11,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:11,654 INFO L225 Difference]: With dead ends: 738 [2021-05-02 13:17:11,654 INFO L226 Difference]: Without dead ends: 452 [2021-05-02 13:17:11,656 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5329 ImplicationChecksByTransitivity, 11560.9ms TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2021-05-02 13:17:11,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-05-02 13:17:11,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 450. [2021-05-02 13:17:11,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 445 states have (on average 1.2202247191011235) internal successors, (543), 445 states have internal predecessors, (543), 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 13:17:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 547 transitions. [2021-05-02 13:17:11,664 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 547 transitions. Word has length 443 [2021-05-02 13:17:11,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:11,664 INFO L480 AbstractCegarLoop]: Abstraction has 450 states and 547 transitions. [2021-05-02 13:17:11,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.6037735849056602) internal successors, (276), 105 states have internal predecessors, (276), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:17:11,665 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 547 transitions. [2021-05-02 13:17:11,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2021-05-02 13:17:11,666 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:11,666 INFO L523 BasicCegarLoop]: trace histogram [148, 77, 71, 71, 45, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:11,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:11,867 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:11,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:11,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1872746312, now seen corresponding path program 76 times [2021-05-02 13:17:11,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:11,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236562417] [2021-05-02 13:17:11,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:14,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 26874 backedges. 10998 proven. 6006 refuted. 0 times theorem prover too weak. 9870 trivial. 0 not checked. [2021-05-02 13:17:14,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:14,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236562417] [2021-05-02 13:17:14,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236562417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:14,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613466563] [2021-05-02 13:17:14,415 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 13:17:14,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:17:14,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:17:14,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 79 conjunts are in the unsatisfiable core [2021-05-02 13:17:14,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:14,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:14,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 26874 backedges. 10998 proven. 6006 refuted. 0 times theorem prover too weak. 9870 trivial. 0 not checked. [2021-05-02 13:17:15,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613466563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:15,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:15,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80] total 82 [2021-05-02 13:17:15,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632634792] [2021-05-02 13:17:15,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 13:17:15,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:15,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 13:17:15,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 13:17:15,183 INFO L87 Difference]: Start difference. First operand 450 states and 547 transitions. Second operand has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:17:20,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:20,610 INFO L93 Difference]: Finished difference Result 742 states and 937 transitions. [2021-05-02 13:17:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 13:17:20,611 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (4), 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 449 [2021-05-02 13:17:20,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:20,612 INFO L225 Difference]: With dead ends: 742 [2021-05-02 13:17:20,612 INFO L226 Difference]: Without dead ends: 452 [2021-05-02 13:17:20,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3308 ImplicationChecksByTransitivity, 7537.7ms TimeCoverageRelationStatistics Valid=9561, Invalid=15879, Unknown=0, NotChecked=0, Total=25440 [2021-05-02 13:17:20,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-05-02 13:17:20,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2021-05-02 13:17:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 447 states have (on average 1.2192393736017897) internal successors, (545), 447 states have internal predecessors, (545), 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 13:17:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 549 transitions. [2021-05-02 13:17:20,623 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 549 transitions. Word has length 449 [2021-05-02 13:17:20,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:20,623 INFO L480 AbstractCegarLoop]: Abstraction has 452 states and 549 transitions. [2021-05-02 13:17:20,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:17:20,623 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 549 transitions. [2021-05-02 13:17:20,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-05-02 13:17:20,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:20,625 INFO L523 BasicCegarLoop]: trace histogram [149, 78, 71, 71, 45, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:20,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-02 13:17:20,825 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:20,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:20,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1431911787, now seen corresponding path program 77 times [2021-05-02 13:17:20,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:20,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655829522] [2021-05-02 13:17:20,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:23,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 27171 backedges. 11139 proven. 6162 refuted. 0 times theorem prover too weak. 9870 trivial. 0 not checked. [2021-05-02 13:17:23,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:23,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655829522] [2021-05-02 13:17:23,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655829522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:23,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068439138] [2021-05-02 13:17:23,781 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 13:17:23,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 99 check-sat command(s) [2021-05-02 13:17:23,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:17:23,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 13:17:23,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:24,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:25,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:26,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:27,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:27,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:27,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:27,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:27,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:27,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:27,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:27,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:27,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:27,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:27,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:27,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:27,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:27,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:27,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:27,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:29,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:29,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 27171 backedges. 15994 proven. 4377 refuted. 0 times theorem prover too weak. 6800 trivial. 0 not checked. [2021-05-02 13:17:29,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068439138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:29,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:29,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 51] total 131 [2021-05-02 13:17:29,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729168979] [2021-05-02 13:17:29,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 131 states [2021-05-02 13:17:29,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:29,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-05-02 13:17:29,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 13:17:29,348 INFO L87 Difference]: Start difference. First operand 452 states and 549 transitions. Second operand has 131 states, 131 states have (on average 2.7786259541984735) internal successors, (364), 130 states have internal predecessors, (364), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:17:44,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:44,233 INFO L93 Difference]: Finished difference Result 760 states and 963 transitions. [2021-05-02 13:17:44,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-05-02 13:17:44,234 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.7786259541984735) internal successors, (364), 130 states have internal predecessors, (364), 2 states have call successors, (4), 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 451 [2021-05-02 13:17:44,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:44,236 INFO L225 Difference]: With dead ends: 760 [2021-05-02 13:17:44,236 INFO L226 Difference]: Without dead ends: 470 [2021-05-02 13:17:44,239 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8206 ImplicationChecksByTransitivity, 20736.4ms TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2021-05-02 13:17:44,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-02 13:17:44,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2021-05-02 13:17:44,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 465 states have (on average 1.2193548387096773) internal successors, (567), 465 states have internal predecessors, (567), 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 13:17:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 571 transitions. [2021-05-02 13:17:44,253 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 571 transitions. Word has length 451 [2021-05-02 13:17:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:44,253 INFO L480 AbstractCegarLoop]: Abstraction has 470 states and 571 transitions. [2021-05-02 13:17:44,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 131 states, 131 states have (on average 2.7786259541984735) internal successors, (364), 130 states have internal predecessors, (364), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:17:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 571 transitions. [2021-05-02 13:17:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2021-05-02 13:17:44,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:44,256 INFO L523 BasicCegarLoop]: trace histogram [154, 79, 75, 75, 49, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:44,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:44,456 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:44,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1303076466, now seen corresponding path program 78 times [2021-05-02 13:17:44,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:44,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623296257] [2021-05-02 13:17:44,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:47,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 29266 backedges. 11920 proven. 6320 refuted. 0 times theorem prover too weak. 11026 trivial. 0 not checked. [2021-05-02 13:17:47,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:47,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623296257] [2021-05-02 13:17:47,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623296257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:47,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063163770] [2021-05-02 13:17:47,502 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 13:17:47,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 107 check-sat command(s) [2021-05-02 13:17:47,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:17:47,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 13:17:47,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:48,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:48,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:48,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:48,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:48,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:48,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:48,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:48,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:48,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:48,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:48,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:48,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:48,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:48,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:48,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:48,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:48,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:48,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 29266 backedges. 9354 proven. 1352 refuted. 0 times theorem prover too weak. 18560 trivial. 0 not checked. [2021-05-02 13:17:50,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063163770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:50,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:50,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 29] total 110 [2021-05-02 13:17:50,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890350981] [2021-05-02 13:17:50,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-02 13:17:50,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:50,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-02 13:17:50,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 13:17:50,867 INFO L87 Difference]: Start difference. First operand 470 states and 571 transitions. Second operand has 110 states, 110 states have (on average 2.6) internal successors, (286), 109 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:18:00,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:00,678 INFO L93 Difference]: Finished difference Result 784 states and 992 transitions. [2021-05-02 13:18:00,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-02 13:18:00,679 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.6) internal successors, (286), 109 states have internal predecessors, (286), 2 states have call successors, (4), 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 469 [2021-05-02 13:18:00,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:00,680 INFO L225 Difference]: With dead ends: 784 [2021-05-02 13:18:00,681 INFO L226 Difference]: Without dead ends: 478 [2021-05-02 13:18:00,682 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5750 ImplicationChecksByTransitivity, 14181.0ms TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2021-05-02 13:18:00,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-05-02 13:18:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 476. [2021-05-02 13:18:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 471 states have (on average 1.2208067940552016) internal successors, (575), 471 states have internal predecessors, (575), 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 13:18:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 579 transitions. [2021-05-02 13:18:00,693 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 579 transitions. Word has length 469 [2021-05-02 13:18:00,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:18:00,693 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 579 transitions. [2021-05-02 13:18:00,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.6) internal successors, (286), 109 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:18:00,693 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 579 transitions. [2021-05-02 13:18:00,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2021-05-02 13:18:00,695 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:18:00,695 INFO L523 BasicCegarLoop]: trace histogram [156, 80, 76, 76, 49, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:00,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:00,896 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:00,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:00,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1206417988, now seen corresponding path program 79 times [2021-05-02 13:18:00,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:00,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364408278] [2021-05-02 13:18:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:04,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 30036 backedges. 12231 proven. 6480 refuted. 0 times theorem prover too weak. 11325 trivial. 0 not checked. [2021-05-02 13:18:04,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:04,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364408278] [2021-05-02 13:18:04,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364408278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:04,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791909460] [2021-05-02 13:18:04,190 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 13:18:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:04,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 941 conjuncts, 82 conjunts are in the unsatisfiable core [2021-05-02 13:18:04,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:04,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30036 backedges. 12231 proven. 6480 refuted. 0 times theorem prover too weak. 11325 trivial. 0 not checked. [2021-05-02 13:18:05,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791909460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:05,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:05,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83] total 85 [2021-05-02 13:18:05,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414921961] [2021-05-02 13:18:05,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 13:18:05,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:05,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 13:18:05,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 13:18:05,146 INFO L87 Difference]: Start difference. First operand 476 states and 579 transitions. Second operand has 85 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 84 states have internal predecessors, (178), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:18:11,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:11,076 INFO L93 Difference]: Finished difference Result 788 states and 995 transitions. [2021-05-02 13:18:11,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 13:18:11,077 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 84 states have internal predecessors, (178), 2 states have call successors, (4), 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 475 [2021-05-02 13:18:11,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:11,078 INFO L225 Difference]: With dead ends: 788 [2021-05-02 13:18:11,078 INFO L226 Difference]: Without dead ends: 478 [2021-05-02 13:18:11,079 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3557 ImplicationChecksByTransitivity, 8698.6ms TimeCoverageRelationStatistics Valid=10293, Invalid=17097, Unknown=0, NotChecked=0, Total=27390 [2021-05-02 13:18:11,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-05-02 13:18:11,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2021-05-02 13:18:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 473 states have (on average 1.2198731501057083) internal successors, (577), 473 states have internal predecessors, (577), 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 13:18:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 581 transitions. [2021-05-02 13:18:11,090 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 581 transitions. Word has length 475 [2021-05-02 13:18:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:18:11,090 INFO L480 AbstractCegarLoop]: Abstraction has 478 states and 581 transitions. [2021-05-02 13:18:11,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 84 states have internal predecessors, (178), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:18:11,090 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 581 transitions. [2021-05-02 13:18:11,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-05-02 13:18:11,092 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:18:11,092 INFO L523 BasicCegarLoop]: trace histogram [157, 81, 76, 76, 49, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:11,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:11,293 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:11,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:11,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1689078241, now seen corresponding path program 80 times [2021-05-02 13:18:11,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:11,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249550207] [2021-05-02 13:18:11,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:14,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 30349 backedges. 12382 proven. 6642 refuted. 0 times theorem prover too weak. 11325 trivial. 0 not checked. [2021-05-02 13:18:14,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:14,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249550207] [2021-05-02 13:18:14,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249550207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:14,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918637122] [2021-05-02 13:18:14,663 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 13:18:14,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:18:14,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:18:14,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 83 conjunts are in the unsatisfiable core [2021-05-02 13:18:14,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:14,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:14,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30349 backedges. 12382 proven. 6642 refuted. 0 times theorem prover too weak. 11325 trivial. 0 not checked. [2021-05-02 13:18:15,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918637122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:15,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:15,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84] total 86 [2021-05-02 13:18:15,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55654910] [2021-05-02 13:18:15,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 13:18:15,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:15,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 13:18:15,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 13:18:15,605 INFO L87 Difference]: Start difference. First operand 478 states and 581 transitions. Second operand has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 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 13:18:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:21,910 INFO L93 Difference]: Finished difference Result 790 states and 997 transitions. [2021-05-02 13:18:21,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 13:18:21,911 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 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 477 [2021-05-02 13:18:21,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:21,912 INFO L225 Difference]: With dead ends: 790 [2021-05-02 13:18:21,912 INFO L226 Difference]: Without dead ends: 480 [2021-05-02 13:18:21,914 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3642 ImplicationChecksByTransitivity, 9096.0ms TimeCoverageRelationStatistics Valid=10543, Invalid=17513, Unknown=0, NotChecked=0, Total=28056 [2021-05-02 13:18:21,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-05-02 13:18:21,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 480. [2021-05-02 13:18:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 475 states have (on average 1.2189473684210526) internal successors, (579), 475 states have internal predecessors, (579), 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 13:18:21,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 583 transitions. [2021-05-02 13:18:21,924 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 583 transitions. Word has length 477 [2021-05-02 13:18:21,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:18:21,924 INFO L480 AbstractCegarLoop]: Abstraction has 480 states and 583 transitions. [2021-05-02 13:18:21,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 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 13:18:21,924 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 583 transitions. [2021-05-02 13:18:21,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-05-02 13:18:21,926 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:18:21,926 INFO L523 BasicCegarLoop]: trace histogram [158, 82, 76, 76, 49, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:22,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:22,127 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:22,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:22,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1669113406, now seen corresponding path program 81 times [2021-05-02 13:18:22,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:22,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835606050] [2021-05-02 13:18:22,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:26,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30664 backedges. 12533 proven. 6806 refuted. 0 times theorem prover too weak. 11325 trivial. 0 not checked. [2021-05-02 13:18:26,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:26,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835606050] [2021-05-02 13:18:26,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835606050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:26,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720710487] [2021-05-02 13:18:26,064 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 13:18:26,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 56 check-sat command(s) [2021-05-02 13:18:26,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:18:26,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 13:18:26,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:26,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:26,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:26,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:26,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:29,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:29,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:29,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:29,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:29,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:29,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:29,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:29,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:29,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:29,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:29,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:29,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:29,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:29,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:30,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:30,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30664 backedges. 9872 proven. 1458 refuted. 0 times theorem prover too weak. 19334 trivial. 0 not checked. [2021-05-02 13:18:30,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720710487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:30,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:30,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 30] total 114 [2021-05-02 13:18:30,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250998203] [2021-05-02 13:18:30,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-02 13:18:30,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:30,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-02 13:18:30,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 13:18:30,141 INFO L87 Difference]: Start difference. First operand 480 states and 583 transitions. Second operand has 114 states, 114 states have (on average 2.5964912280701755) internal successors, (296), 113 states have internal predecessors, (296), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:18:41,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:41,777 INFO L93 Difference]: Finished difference Result 798 states and 1010 transitions. [2021-05-02 13:18:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-02 13:18:41,778 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.5964912280701755) internal successors, (296), 113 states have internal predecessors, (296), 2 states have call successors, (4), 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 479 [2021-05-02 13:18:41,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:41,779 INFO L225 Difference]: With dead ends: 798 [2021-05-02 13:18:41,779 INFO L226 Difference]: Without dead ends: 488 [2021-05-02 13:18:41,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6187 ImplicationChecksByTransitivity, 17288.6ms TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2021-05-02 13:18:41,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-05-02 13:18:41,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 486. [2021-05-02 13:18:41,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 481 states have (on average 1.2203742203742203) internal successors, (587), 481 states have internal predecessors, (587), 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 13:18:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 591 transitions. [2021-05-02 13:18:41,792 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 591 transitions. Word has length 479 [2021-05-02 13:18:41,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:18:41,792 INFO L480 AbstractCegarLoop]: Abstraction has 486 states and 591 transitions. [2021-05-02 13:18:41,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 114 states have (on average 2.5964912280701755) internal successors, (296), 113 states have internal predecessors, (296), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:18:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 591 transitions. [2021-05-02 13:18:41,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2021-05-02 13:18:41,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:18:41,795 INFO L523 BasicCegarLoop]: trace histogram [160, 83, 77, 77, 49, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:41,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:41,996 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:41,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1617004876, now seen corresponding path program 82 times [2021-05-02 13:18:41,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:41,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977162315] [2021-05-02 13:18:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:45,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 31452 backedges. 12852 proven. 6972 refuted. 0 times theorem prover too weak. 11628 trivial. 0 not checked. [2021-05-02 13:18:45,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:45,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977162315] [2021-05-02 13:18:45,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977162315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:45,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619278586] [2021-05-02 13:18:45,742 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 13:18:45,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:18:45,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:18:45,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-02 13:18:45,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:45,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:45,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 31452 backedges. 12852 proven. 6972 refuted. 0 times theorem prover too weak. 11628 trivial. 0 not checked. [2021-05-02 13:18:46,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619278586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:46,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:46,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86] total 88 [2021-05-02 13:18:46,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667104242] [2021-05-02 13:18:46,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 13:18:46,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:46,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 13:18:46,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 13:18:46,781 INFO L87 Difference]: Start difference. First operand 486 states and 591 transitions. Second operand has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 87 states have internal predecessors, (184), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:18:53,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:53,447 INFO L93 Difference]: Finished difference Result 802 states and 1013 transitions. [2021-05-02 13:18:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 13:18:53,448 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 87 states have internal predecessors, (184), 2 states have call successors, (4), 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 485 [2021-05-02 13:18:53,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:53,450 INFO L225 Difference]: With dead ends: 802 [2021-05-02 13:18:53,450 INFO L226 Difference]: Without dead ends: 488 [2021-05-02 13:18:53,452 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 9914.7ms TimeCoverageRelationStatistics Valid=11052, Invalid=18360, Unknown=0, NotChecked=0, Total=29412 [2021-05-02 13:18:53,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-05-02 13:18:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 488. [2021-05-02 13:18:53,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 483 states have (on average 1.2194616977225672) internal successors, (589), 483 states have internal predecessors, (589), 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 13:18:53,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 593 transitions. [2021-05-02 13:18:53,463 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 593 transitions. Word has length 485 [2021-05-02 13:18:53,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:18:53,463 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 593 transitions. [2021-05-02 13:18:53,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 87 states have internal predecessors, (184), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:18:53,464 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 593 transitions. [2021-05-02 13:18:53,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-05-02 13:18:53,466 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:18:53,466 INFO L523 BasicCegarLoop]: trace histogram [161, 84, 77, 77, 49, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:53,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:53,666 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:53,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:53,667 INFO L82 PathProgramCache]: Analyzing trace with hash -735173103, now seen corresponding path program 83 times [2021-05-02 13:18:53,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:53,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387928470] [2021-05-02 13:18:53,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:57,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 31773 backedges. 13005 proven. 7140 refuted. 0 times theorem prover too weak. 11628 trivial. 0 not checked. [2021-05-02 13:18:57,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:57,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387928470] [2021-05-02 13:18:57,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387928470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:57,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181995573] [2021-05-02 13:18:57,527 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 13:18:57,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 107 check-sat command(s) [2021-05-02 13:18:57,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:18:57,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 13:18:57,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:57,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:57,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:58,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:00,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:00,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:00,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:00,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:00,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:00,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:00,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:00,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:00,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:00,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:00,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:00,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:00,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:00,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:00,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:00,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:01,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:01,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:01,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:01,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:01,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:01,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:01,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:01,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:01,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:01,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:01,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:01,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:01,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:01,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:01,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:01,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:02,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:02,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:02,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:02,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:02,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:02,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:02,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:02,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:02,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:02,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:02,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:02,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:02,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:02,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:02,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:02,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:03,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:03,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:03,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:03,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:03,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:03,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:03,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:03,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:03,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:03,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:03,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:03,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:04,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:04,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:04,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:04,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:04,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:04,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:04,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:04,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:04,812 INFO L134 CoverageAnalysis]: Checked inductivity of 31773 backedges. 18678 proven. 5157 refuted. 0 times theorem prover too weak. 7938 trivial. 0 not checked. [2021-05-02 13:19:04,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181995573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:04,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:19:04,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 55] total 141 [2021-05-02 13:19:04,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646124557] [2021-05-02 13:19:04,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 141 states [2021-05-02 13:19:04,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:19:04,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-05-02 13:19:04,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2021-05-02 13:19:04,815 INFO L87 Difference]: Start difference. First operand 488 states and 593 transitions. Second operand has 141 states, 141 states have (on average 2.780141843971631) internal successors, (392), 140 states have internal predecessors, (392), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:19:22,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:19:22,759 INFO L93 Difference]: Finished difference Result 820 states and 1039 transitions. [2021-05-02 13:19:22,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-05-02 13:19:22,760 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.780141843971631) internal successors, (392), 140 states have internal predecessors, (392), 2 states have call successors, (4), 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 487 [2021-05-02 13:19:22,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:19:22,762 INFO L225 Difference]: With dead ends: 820 [2021-05-02 13:19:22,762 INFO L226 Difference]: Without dead ends: 506 [2021-05-02 13:19:22,764 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9537 ImplicationChecksByTransitivity, 26005.5ms TimeCoverageRelationStatistics Valid=29190, Invalid=48372, Unknown=0, NotChecked=0, Total=77562 [2021-05-02 13:19:22,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-05-02 13:19:22,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2021-05-02 13:19:22,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 501 states have (on average 1.219560878243513) internal successors, (611), 501 states have internal predecessors, (611), 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 13:19:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 615 transitions. [2021-05-02 13:19:22,775 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 615 transitions. Word has length 487 [2021-05-02 13:19:22,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:19:22,776 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 615 transitions. [2021-05-02 13:19:22,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 141 states, 141 states have (on average 2.780141843971631) internal successors, (392), 140 states have internal predecessors, (392), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:19:22,776 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 615 transitions. [2021-05-02 13:19:22,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-05-02 13:19:22,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:19:22,778 INFO L523 BasicCegarLoop]: trace histogram [166, 85, 81, 81, 53, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:19:22,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-05-02 13:19:22,979 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:19:22,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:19:22,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1164233354, now seen corresponding path program 84 times [2021-05-02 13:19:22,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:19:22,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576208592] [2021-05-02 13:19:22,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:19:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:26,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:19:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 34036 backedges. 13846 proven. 7310 refuted. 0 times theorem prover too weak. 12880 trivial. 0 not checked. [2021-05-02 13:19:26,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:19:26,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576208592] [2021-05-02 13:19:26,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576208592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:26,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449041763] [2021-05-02 13:19:26,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:19:27,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 115 check-sat command(s) [2021-05-02 13:19:27,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:19:27,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:19:27,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:19:27,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:27,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:27,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:27,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:27,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:27,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:27,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:27,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:28,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:29,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 34036 backedges. 10858 proven. 1568 refuted. 0 times theorem prover too weak. 21610 trivial. 0 not checked. [2021-05-02 13:19:30,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449041763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:30,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:19:30,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 31] total 118 [2021-05-02 13:19:30,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917708259] [2021-05-02 13:19:30,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-02 13:19:30,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:19:30,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-02 13:19:30,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 13:19:30,465 INFO L87 Difference]: Start difference. First operand 506 states and 615 transitions. Second operand has 118 states, 118 states have (on average 2.593220338983051) internal successors, (306), 117 states have internal predecessors, (306), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:19:40,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:19:40,584 INFO L93 Difference]: Finished difference Result 844 states and 1068 transitions. [2021-05-02 13:19:40,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-02 13:19:40,585 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.593220338983051) internal successors, (306), 117 states have internal predecessors, (306), 2 states have call successors, (4), 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 505 [2021-05-02 13:19:40,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:19:40,586 INFO L225 Difference]: With dead ends: 844 [2021-05-02 13:19:40,586 INFO L226 Difference]: Without dead ends: 514 [2021-05-02 13:19:40,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6640 ImplicationChecksByTransitivity, 15467.2ms TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2021-05-02 13:19:40,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-05-02 13:19:40,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 512. [2021-05-02 13:19:40,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 507 states have (on average 1.2209072978303748) internal successors, (619), 507 states have internal predecessors, (619), 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 13:19:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 623 transitions. [2021-05-02 13:19:40,598 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 623 transitions. Word has length 505 [2021-05-02 13:19:40,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:19:40,598 INFO L480 AbstractCegarLoop]: Abstraction has 512 states and 623 transitions. [2021-05-02 13:19:40,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 118 states, 118 states have (on average 2.593220338983051) internal successors, (306), 117 states have internal predecessors, (306), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:19:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 623 transitions. [2021-05-02 13:19:40,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-05-02 13:19:40,600 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:19:40,600 INFO L523 BasicCegarLoop]: trace histogram [168, 86, 82, 82, 53, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:19:40,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:40,801 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:19:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:19:40,801 INFO L82 PathProgramCache]: Analyzing trace with hash 843340480, now seen corresponding path program 85 times [2021-05-02 13:19:40,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:19:40,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629255496] [2021-05-02 13:19:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:19:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:44,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:19:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 34866 backedges. 14181 proven. 7482 refuted. 0 times theorem prover too weak. 13203 trivial. 0 not checked. [2021-05-02 13:19:44,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:19:44,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629255496] [2021-05-02 13:19:44,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629255496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:44,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151578279] [2021-05-02 13:19:44,168 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 13:19:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:44,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 88 conjunts are in the unsatisfiable core [2021-05-02 13:19:44,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:19:44,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:44,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34866 backedges. 14181 proven. 7482 refuted. 0 times theorem prover too weak. 13203 trivial. 0 not checked. [2021-05-02 13:19:45,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151578279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:45,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:19:45,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89] total 91 [2021-05-02 13:19:45,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903904380] [2021-05-02 13:19:45,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 13:19:45,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:19:45,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 13:19:45,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 13:19:45,085 INFO L87 Difference]: Start difference. First operand 512 states and 623 transitions. Second operand has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 90 states have internal predecessors, (190), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:19:51,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:19:51,092 INFO L93 Difference]: Finished difference Result 848 states and 1071 transitions. [2021-05-02 13:19:51,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 13:19:51,093 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 90 states have internal predecessors, (190), 2 states have call successors, (4), 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 511 [2021-05-02 13:19:51,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:19:51,094 INFO L225 Difference]: With dead ends: 848 [2021-05-02 13:19:51,094 INFO L226 Difference]: Without dead ends: 514 [2021-05-02 13:19:51,095 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 8892.0ms TimeCoverageRelationStatistics Valid=11838, Invalid=19668, Unknown=0, NotChecked=0, Total=31506 [2021-05-02 13:19:51,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-05-02 13:19:51,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2021-05-02 13:19:51,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 509 states have (on average 1.2200392927308448) internal successors, (621), 509 states have internal predecessors, (621), 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 13:19:51,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 625 transitions. [2021-05-02 13:19:51,115 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 625 transitions. Word has length 511 [2021-05-02 13:19:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:19:51,115 INFO L480 AbstractCegarLoop]: Abstraction has 514 states and 625 transitions. [2021-05-02 13:19:51,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 90 states have internal predecessors, (190), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:19:51,115 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 625 transitions. [2021-05-02 13:19:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2021-05-02 13:19:51,118 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:19:51,118 INFO L523 BasicCegarLoop]: trace histogram [169, 87, 82, 82, 53, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:19:51,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-02 13:19:51,318 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:19:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:19:51,318 INFO L82 PathProgramCache]: Analyzing trace with hash -17145891, now seen corresponding path program 86 times [2021-05-02 13:19:51,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:19:51,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802157907] [2021-05-02 13:19:51,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:19:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:55,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:19:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 35203 backedges. 14344 proven. 7656 refuted. 0 times theorem prover too weak. 13203 trivial. 0 not checked. [2021-05-02 13:19:55,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:19:55,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802157907] [2021-05-02 13:19:55,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802157907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:55,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200038312] [2021-05-02 13:19:55,072 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 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 13:19:55,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:19:55,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:19:55,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 89 conjunts are in the unsatisfiable core [2021-05-02 13:19:55,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:19:55,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:55,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 35203 backedges. 14344 proven. 7656 refuted. 0 times theorem prover too weak. 13203 trivial. 0 not checked. [2021-05-02 13:19:56,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200038312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:56,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:19:56,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90] total 92 [2021-05-02 13:19:56,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541004862] [2021-05-02 13:19:56,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 13:19:56,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:19:56,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 13:19:56,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 13:19:56,125 INFO L87 Difference]: Start difference. First operand 514 states and 625 transitions. Second operand has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 91 states have internal predecessors, (192), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:20:02,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:20:02,844 INFO L93 Difference]: Finished difference Result 850 states and 1073 transitions. [2021-05-02 13:20:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 13:20:02,845 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 91 states have internal predecessors, (192), 2 states have call successors, (4), 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 513 [2021-05-02 13:20:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:20:02,846 INFO L225 Difference]: With dead ends: 850 [2021-05-02 13:20:02,846 INFO L226 Difference]: Without dead ends: 516 [2021-05-02 13:20:02,847 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4173 ImplicationChecksByTransitivity, 9916.2ms TimeCoverageRelationStatistics Valid=12106, Invalid=20114, Unknown=0, NotChecked=0, Total=32220 [2021-05-02 13:20:02,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-05-02 13:20:02,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-05-02 13:20:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 511 states have (on average 1.2191780821917808) internal successors, (623), 511 states have internal predecessors, (623), 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 13:20:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 627 transitions. [2021-05-02 13:20:02,866 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 627 transitions. Word has length 513 [2021-05-02 13:20:02,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:20:02,866 INFO L480 AbstractCegarLoop]: Abstraction has 516 states and 627 transitions. [2021-05-02 13:20:02,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 91 states have internal predecessors, (192), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:20:02,866 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 627 transitions. [2021-05-02 13:20:02,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2021-05-02 13:20:02,868 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:20:02,868 INFO L523 BasicCegarLoop]: trace histogram [170, 88, 82, 82, 53, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:20:03,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-02 13:20:03,069 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:20:03,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:20:03,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1984139706, now seen corresponding path program 87 times [2021-05-02 13:20:03,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:20:03,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618530786] [2021-05-02 13:20:03,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:20:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:07,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:20:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 35542 backedges. 14507 proven. 7832 refuted. 0 times theorem prover too weak. 13203 trivial. 0 not checked. [2021-05-02 13:20:07,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:20:07,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618530786] [2021-05-02 13:20:07,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618530786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:07,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454774605] [2021-05-02 13:20:07,151 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 13:20:07,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2021-05-02 13:20:07,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:20:07,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 13:20:07,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:20:07,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:10,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:10,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:10,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:10,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:10,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:10,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:10,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:10,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:10,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:10,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:10,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:10,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:10,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:10,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:10,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:10,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:11,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:11,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:11,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:11,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 35542 backedges. 11416 proven. 1682 refuted. 0 times theorem prover too weak. 22444 trivial. 0 not checked. [2021-05-02 13:20:11,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454774605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:11,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:20:11,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 32] total 122 [2021-05-02 13:20:11,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129307231] [2021-05-02 13:20:11,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states [2021-05-02 13:20:11,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:20:11,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-05-02 13:20:11,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 13:20:11,297 INFO L87 Difference]: Start difference. First operand 516 states and 627 transitions. Second operand has 122 states, 122 states have (on average 2.5901639344262297) internal successors, (316), 121 states have internal predecessors, (316), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:20:24,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:20:24,412 INFO L93 Difference]: Finished difference Result 858 states and 1086 transitions. [2021-05-02 13:20:24,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-02 13:20:24,412 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.5901639344262297) internal successors, (316), 121 states have internal predecessors, (316), 2 states have call successors, (4), 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 515 [2021-05-02 13:20:24,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:20:24,414 INFO L225 Difference]: With dead ends: 858 [2021-05-02 13:20:24,414 INFO L226 Difference]: Without dead ends: 524 [2021-05-02 13:20:24,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7109 ImplicationChecksByTransitivity, 18889.8ms TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2021-05-02 13:20:24,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-05-02 13:20:24,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2021-05-02 13:20:24,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 517 states have (on average 1.2205029013539652) internal successors, (631), 517 states have internal predecessors, (631), 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 13:20:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 635 transitions. [2021-05-02 13:20:24,432 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 635 transitions. Word has length 515 [2021-05-02 13:20:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:20:24,432 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 635 transitions. [2021-05-02 13:20:24,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 122 states, 122 states have (on average 2.5901639344262297) internal successors, (316), 121 states have internal predecessors, (316), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:20:24,433 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 635 transitions. [2021-05-02 13:20:24,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2021-05-02 13:20:24,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:20:24,436 INFO L523 BasicCegarLoop]: trace histogram [172, 89, 83, 83, 53, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:20:24,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:20:24,637 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:20:24,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:20:24,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1374615984, now seen corresponding path program 88 times [2021-05-02 13:20:24,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:20:24,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992432894] [2021-05-02 13:20:24,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:20:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:28,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:20:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 36390 backedges. 14850 proven. 8010 refuted. 0 times theorem prover too weak. 13530 trivial. 0 not checked. [2021-05-02 13:20:28,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:20:28,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992432894] [2021-05-02 13:20:28,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992432894] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:28,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539590425] [2021-05-02 13:20:28,880 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 13:20:29,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:20:29,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:20:29,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 91 conjunts are in the unsatisfiable core [2021-05-02 13:20:29,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:20:29,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 36390 backedges. 14850 proven. 8010 refuted. 0 times theorem prover too weak. 13530 trivial. 0 not checked. [2021-05-02 13:20:29,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539590425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:29,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:20:29,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92] total 94 [2021-05-02 13:20:29,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961250830] [2021-05-02 13:20:29,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 13:20:29,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:20:29,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 13:20:29,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 13:20:29,963 INFO L87 Difference]: Start difference. First operand 522 states and 635 transitions. Second operand has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:20:37,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:20:37,165 INFO L93 Difference]: Finished difference Result 862 states and 1089 transitions. [2021-05-02 13:20:37,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-02 13:20:37,166 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 2 states have call successors, (4), 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 521 [2021-05-02 13:20:37,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:20:37,167 INFO L225 Difference]: With dead ends: 862 [2021-05-02 13:20:37,167 INFO L226 Difference]: Without dead ends: 524 [2021-05-02 13:20:37,168 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4358 ImplicationChecksByTransitivity, 10770.6ms TimeCoverageRelationStatistics Valid=12651, Invalid=21021, Unknown=0, NotChecked=0, Total=33672 [2021-05-02 13:20:37,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-05-02 13:20:37,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 524. [2021-05-02 13:20:37,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 519 states have (on average 1.2196531791907514) internal successors, (633), 519 states have internal predecessors, (633), 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 13:20:37,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 637 transitions. [2021-05-02 13:20:37,178 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 637 transitions. Word has length 521 [2021-05-02 13:20:37,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:20:37,179 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 637 transitions. [2021-05-02 13:20:37,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:20:37,179 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 637 transitions. [2021-05-02 13:20:37,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2021-05-02 13:20:37,181 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:20:37,181 INFO L523 BasicCegarLoop]: trace histogram [173, 90, 83, 83, 53, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:20:37,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:20:37,382 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:20:37,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:20:37,382 INFO L82 PathProgramCache]: Analyzing trace with hash -2004156787, now seen corresponding path program 89 times [2021-05-02 13:20:37,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:20:37,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972983151] [2021-05-02 13:20:37,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:20:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:41,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:20:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:41,660 INFO L134 CoverageAnalysis]: Checked inductivity of 36735 backedges. 15015 proven. 8190 refuted. 0 times theorem prover too weak. 13530 trivial. 0 not checked. [2021-05-02 13:20:41,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:20:41,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972983151] [2021-05-02 13:20:41,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972983151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:41,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189936106] [2021-05-02 13:20:41,660 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 13:20:41,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 115 check-sat command(s) [2021-05-02 13:20:41,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:20:41,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 13:20:41,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:20:42,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:42,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:42,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:42,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:42,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:42,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:42,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:42,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:42,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:42,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:42,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:42,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:42,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:42,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:42,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:42,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:42,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:42,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:43,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:44,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:44,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:44,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:44,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:44,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:44,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:44,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:44,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:44,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:44,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:44,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:44,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:44,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:44,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:44,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:44,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:45,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:45,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:45,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:45,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:45,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:45,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:45,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:45,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:45,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:45,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:45,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:45,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:45,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:45,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:45,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:45,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:46,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:46,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:46,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:46,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:46,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:46,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:46,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:46,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:46,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:46,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:46,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:46,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:46,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:46,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:47,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:47,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:47,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:47,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:47,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:47,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:47,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:47,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:47,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:47,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:47,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:47,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:47,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:47,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:48,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:48,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:48,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:48,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:48,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:48,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:48,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:48,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:48,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:48,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:48,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:48,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,081 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 13:20:49,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 36735 backedges. 21570 proven. 6001 refuted. 0 times theorem prover too weak. 9164 trivial. 0 not checked. [2021-05-02 13:20:49,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189936106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:49,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:20:49,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 59] total 151 [2021-05-02 13:20:49,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273348540] [2021-05-02 13:20:49,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 151 states [2021-05-02 13:20:49,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:20:49,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-05-02 13:20:49,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2021-05-02 13:20:49,715 INFO L87 Difference]: Start difference. First operand 524 states and 637 transitions. Second operand has 151 states, 151 states have (on average 2.781456953642384) internal successors, (420), 150 states have internal predecessors, (420), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:21:08,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:21:08,760 INFO L93 Difference]: Finished difference Result 880 states and 1115 transitions. [2021-05-02 13:21:08,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-05-02 13:21:08,761 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.781456953642384) internal successors, (420), 150 states have internal predecessors, (420), 2 states have call successors, (4), 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 523 [2021-05-02 13:21:08,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:21:08,763 INFO L225 Difference]: With dead ends: 880 [2021-05-02 13:21:08,763 INFO L226 Difference]: Without dead ends: 542 [2021-05-02 13:21:08,765 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10968 ImplicationChecksByTransitivity, 28151.6ms TimeCoverageRelationStatistics Valid=33525, Invalid=55577, Unknown=0, NotChecked=0, Total=89102 [2021-05-02 13:21:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-05-02 13:21:08,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2021-05-02 13:21:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 537 states have (on average 1.2197392923649908) internal successors, (655), 537 states have internal predecessors, (655), 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 13:21:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 659 transitions. [2021-05-02 13:21:08,776 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 659 transitions. Word has length 523 [2021-05-02 13:21:08,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:21:08,776 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 659 transitions. [2021-05-02 13:21:08,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 151 states, 151 states have (on average 2.781456953642384) internal successors, (420), 150 states have internal predecessors, (420), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:21:08,777 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 659 transitions. [2021-05-02 13:21:08,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2021-05-02 13:21:08,779 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:21:08,779 INFO L523 BasicCegarLoop]: trace histogram [178, 91, 87, 87, 57, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:21:08,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:08,980 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:21:08,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:21:08,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1540642682, now seen corresponding path program 90 times [2021-05-02 13:21:08,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:21:08,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019650725] [2021-05-02 13:21:08,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:21:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:13,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:21:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 39166 backedges. 15916 proven. 8372 refuted. 0 times theorem prover too weak. 14878 trivial. 0 not checked. [2021-05-02 13:21:13,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:21:13,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019650725] [2021-05-02 13:21:13,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019650725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:13,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902307090] [2021-05-02 13:21:13,527 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 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 13:21:13,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 123 check-sat command(s) [2021-05-02 13:21:13,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:21:13,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 13:21:13,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:21:14,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:15,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:15,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:15,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:15,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:15,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:15,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:15,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:15,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:15,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:15,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:15,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:15,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:15,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:15,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:15,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:15,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:16,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:17,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:17,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:17,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:17,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:17,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:17,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:17,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:17,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:17,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:17,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:17,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:17,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:17,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:17,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:18,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:18,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:18,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:18,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 39166 backedges. 12474 proven. 1800 refuted. 0 times theorem prover too weak. 24892 trivial. 0 not checked. [2021-05-02 13:21:18,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902307090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:18,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:21:18,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 33] total 126 [2021-05-02 13:21:18,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871129401] [2021-05-02 13:21:18,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2021-05-02 13:21:18,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:21:18,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-05-02 13:21:18,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 13:21:18,325 INFO L87 Difference]: Start difference. First operand 542 states and 659 transitions. Second operand has 126 states, 126 states have (on average 2.5873015873015874) internal successors, (326), 125 states have internal predecessors, (326), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:21:31,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:21:31,814 INFO L93 Difference]: Finished difference Result 904 states and 1144 transitions. [2021-05-02 13:21:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-05-02 13:21:31,814 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.5873015873015874) internal successors, (326), 125 states have internal predecessors, (326), 2 states have call successors, (4), 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 541 [2021-05-02 13:21:31,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:21:31,816 INFO L225 Difference]: With dead ends: 904 [2021-05-02 13:21:31,816 INFO L226 Difference]: Without dead ends: 550 [2021-05-02 13:21:31,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7594 ImplicationChecksByTransitivity, 20056.5ms TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2021-05-02 13:21:31,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-05-02 13:21:31,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 548. [2021-05-02 13:21:31,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 543 states have (on average 1.2209944751381216) internal successors, (663), 543 states have internal predecessors, (663), 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 13:21:31,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 667 transitions. [2021-05-02 13:21:31,828 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 667 transitions. Word has length 541 [2021-05-02 13:21:31,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:21:31,828 INFO L480 AbstractCegarLoop]: Abstraction has 548 states and 667 transitions. [2021-05-02 13:21:31,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 126 states, 126 states have (on average 2.5873015873015874) internal successors, (326), 125 states have internal predecessors, (326), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:21:31,829 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 667 transitions. [2021-05-02 13:21:31,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2021-05-02 13:21:31,831 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:21:31,831 INFO L523 BasicCegarLoop]: trace histogram [180, 92, 88, 88, 57, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:21:32,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-05-02 13:21:32,032 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:21:32,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:21:32,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1242058692, now seen corresponding path program 91 times [2021-05-02 13:21:32,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:21:32,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738832389] [2021-05-02 13:21:32,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:21:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:36,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:21:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 16275 proven. 8556 refuted. 0 times theorem prover too weak. 15225 trivial. 0 not checked. [2021-05-02 13:21:36,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:21:36,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738832389] [2021-05-02 13:21:36,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738832389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:36,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353150006] [2021-05-02 13:21:36,637 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 13:21:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:36,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 94 conjunts are in the unsatisfiable core [2021-05-02 13:21:36,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:21:36,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:36,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 16275 proven. 8556 refuted. 0 times theorem prover too weak. 15225 trivial. 0 not checked. [2021-05-02 13:21:37,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353150006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:37,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:21:37,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95] total 97 [2021-05-02 13:21:37,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569818106] [2021-05-02 13:21:37,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 13:21:37,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:21:37,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 13:21:37,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 13:21:37,870 INFO L87 Difference]: Start difference. First operand 548 states and 667 transitions. Second operand has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 96 states have internal predecessors, (202), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:21:45,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:21:45,778 INFO L93 Difference]: Finished difference Result 908 states and 1147 transitions. [2021-05-02 13:21:45,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 13:21:45,779 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 96 states have internal predecessors, (202), 2 states have call successors, (4), 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 547 [2021-05-02 13:21:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:21:45,781 INFO L225 Difference]: With dead ends: 908 [2021-05-02 13:21:45,781 INFO L226 Difference]: Without dead ends: 550 [2021-05-02 13:21:45,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 548 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 11905.1ms TimeCoverageRelationStatistics Valid=13491, Invalid=22419, Unknown=0, NotChecked=0, Total=35910 [2021-05-02 13:21:45,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-05-02 13:21:45,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-05-02 13:21:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 545 states have (on average 1.2201834862385321) internal successors, (665), 545 states have internal predecessors, (665), 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 13:21:45,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 669 transitions. [2021-05-02 13:21:45,793 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 669 transitions. Word has length 547 [2021-05-02 13:21:45,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:21:45,793 INFO L480 AbstractCegarLoop]: Abstraction has 550 states and 669 transitions. [2021-05-02 13:21:45,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 96 states have internal predecessors, (202), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:21:45,793 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 669 transitions. [2021-05-02 13:21:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2021-05-02 13:21:45,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:21:45,795 INFO L523 BasicCegarLoop]: trace histogram [181, 93, 88, 88, 57, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:21:45,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:45,996 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:21:45,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:21:45,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1624386265, now seen corresponding path program 92 times [2021-05-02 13:21:45,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:21:45,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909215372] [2021-05-02 13:21:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:21:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:50,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:21:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 40417 backedges. 16450 proven. 8742 refuted. 0 times theorem prover too weak. 15225 trivial. 0 not checked. [2021-05-02 13:21:50,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:21:50,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909215372] [2021-05-02 13:21:50,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909215372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:50,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753978000] [2021-05-02 13:21:50,753 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 13:21:50,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:21:50,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:21:50,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-02 13:21:50,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:21:50,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 40417 backedges. 16450 proven. 8742 refuted. 0 times theorem prover too weak. 15225 trivial. 0 not checked. [2021-05-02 13:21:51,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753978000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:51,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:21:51,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96] total 98 [2021-05-02 13:21:51,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328671762] [2021-05-02 13:21:51,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 13:21:51,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:21:51,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 13:21:51,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 13:21:51,998 INFO L87 Difference]: Start difference. First operand 550 states and 669 transitions. Second operand has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:22:00,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:22:00,213 INFO L93 Difference]: Finished difference Result 910 states and 1149 transitions. [2021-05-02 13:22:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 13:22:00,213 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 2 states have call successors, (4), 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 549 [2021-05-02 13:22:00,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:22:00,215 INFO L225 Difference]: With dead ends: 910 [2021-05-02 13:22:00,215 INFO L226 Difference]: Without dead ends: 552 [2021-05-02 13:22:00,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4740 ImplicationChecksByTransitivity, 12319.5ms TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2021-05-02 13:22:00,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-05-02 13:22:00,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-05-02 13:22:00,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 547 states have (on average 1.2193784277879343) internal successors, (667), 547 states have internal predecessors, (667), 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 13:22:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 671 transitions. [2021-05-02 13:22:00,227 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 671 transitions. Word has length 549 [2021-05-02 13:22:00,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:22:00,227 INFO L480 AbstractCegarLoop]: Abstraction has 552 states and 671 transitions. [2021-05-02 13:22:00,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:22:00,227 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 671 transitions. [2021-05-02 13:22:00,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2021-05-02 13:22:00,230 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:22:00,230 INFO L523 BasicCegarLoop]: trace histogram [182, 94, 88, 88, 57, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:22:00,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-05-02 13:22:00,430 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:22:00,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:22:00,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1091014090, now seen corresponding path program 93 times [2021-05-02 13:22:00,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:22:00,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217768093] [2021-05-02 13:22:00,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:22:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:05,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:22:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 40780 backedges. 16625 proven. 8930 refuted. 0 times theorem prover too weak. 15225 trivial. 0 not checked. [2021-05-02 13:22:05,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:22:05,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217768093] [2021-05-02 13:22:05,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217768093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:05,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276145920] [2021-05-02 13:22:05,344 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 13:22:05,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2021-05-02 13:22:05,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:22:05,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:22:05,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:22:06,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:07,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:07,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:07,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:07,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:07,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:07,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:07,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:07,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:07,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:07,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:07,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:07,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:07,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:07,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:07,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:07,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:09,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:09,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:09,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:09,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:09,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:09,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:09,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:09,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:09,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:09,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:09,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:09,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:09,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:09,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:10,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:10,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:10,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:10,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 40780 backedges. 13072 proven. 1922 refuted. 0 times theorem prover too weak. 25786 trivial. 0 not checked. [2021-05-02 13:22:10,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276145920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:10,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:22:10,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 34] total 130 [2021-05-02 13:22:10,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394018999] [2021-05-02 13:22:10,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 130 states [2021-05-02 13:22:10,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:22:10,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-05-02 13:22:10,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 13:22:10,366 INFO L87 Difference]: Start difference. First operand 552 states and 671 transitions. Second operand has 130 states, 130 states have (on average 2.5846153846153848) internal successors, (336), 129 states have internal predecessors, (336), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:22:24,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:22:24,926 INFO L93 Difference]: Finished difference Result 918 states and 1162 transitions. [2021-05-02 13:22:24,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-02 13:22:24,927 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.5846153846153848) internal successors, (336), 129 states have internal predecessors, (336), 2 states have call successors, (4), 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 551 [2021-05-02 13:22:24,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:22:24,929 INFO L225 Difference]: With dead ends: 918 [2021-05-02 13:22:24,929 INFO L226 Difference]: Without dead ends: 560 [2021-05-02 13:22:24,931 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8095 ImplicationChecksByTransitivity, 21771.9ms TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2021-05-02 13:22:24,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-05-02 13:22:24,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 558. [2021-05-02 13:22:24,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 553 states have (on average 1.2206148282097649) internal successors, (675), 553 states have internal predecessors, (675), 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 13:22:24,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 679 transitions. [2021-05-02 13:22:24,942 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 679 transitions. Word has length 551 [2021-05-02 13:22:24,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:22:24,942 INFO L480 AbstractCegarLoop]: Abstraction has 558 states and 679 transitions. [2021-05-02 13:22:24,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 130 states, 130 states have (on average 2.5846153846153848) internal successors, (336), 129 states have internal predecessors, (336), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:22:24,942 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 679 transitions. [2021-05-02 13:22:24,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2021-05-02 13:22:24,945 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:22:24,945 INFO L523 BasicCegarLoop]: trace histogram [184, 95, 89, 89, 57, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:22:25,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:22:25,146 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:22:25,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:22:25,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1595814316, now seen corresponding path program 94 times [2021-05-02 13:22:25,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:22:25,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770980053] [2021-05-02 13:22:25,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:22:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:30,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:22:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 41688 backedges. 16992 proven. 9120 refuted. 0 times theorem prover too weak. 15576 trivial. 0 not checked. [2021-05-02 13:22:30,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:22:30,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770980053] [2021-05-02 13:22:30,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770980053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:30,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645672558] [2021-05-02 13:22:30,235 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 13:22:30,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:22:30,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:22:30,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 97 conjunts are in the unsatisfiable core [2021-05-02 13:22:30,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:22:30,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:30,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:31,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:31,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:31,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:31,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:31,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:31,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 41688 backedges. 16992 proven. 9120 refuted. 0 times theorem prover too weak. 15576 trivial. 0 not checked. [2021-05-02 13:22:31,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645672558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:31,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:22:31,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98] total 100 [2021-05-02 13:22:31,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993195924] [2021-05-02 13:22:31,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 13:22:31,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:22:31,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 13:22:31,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 13:22:31,557 INFO L87 Difference]: Start difference. First operand 558 states and 679 transitions. Second operand has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:22:40,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:22:40,423 INFO L93 Difference]: Finished difference Result 922 states and 1165 transitions. [2021-05-02 13:22:40,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-02 13:22:40,424 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 2 states have call successors, (4), 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 557 [2021-05-02 13:22:40,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:22:40,425 INFO L225 Difference]: With dead ends: 922 [2021-05-02 13:22:40,426 INFO L226 Difference]: Without dead ends: 560 [2021-05-02 13:22:40,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4937 ImplicationChecksByTransitivity, 13167.5ms TimeCoverageRelationStatistics Valid=14358, Invalid=23862, Unknown=0, NotChecked=0, Total=38220 [2021-05-02 13:22:40,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-05-02 13:22:40,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2021-05-02 13:22:40,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 555 states have (on average 1.2198198198198198) internal successors, (677), 555 states have internal predecessors, (677), 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 13:22:40,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 681 transitions. [2021-05-02 13:22:40,438 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 681 transitions. Word has length 557 [2021-05-02 13:22:40,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:22:40,438 INFO L480 AbstractCegarLoop]: Abstraction has 560 states and 681 transitions. [2021-05-02 13:22:40,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:22:40,438 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 681 transitions. [2021-05-02 13:22:40,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2021-05-02 13:22:40,441 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:22:40,441 INFO L523 BasicCegarLoop]: trace histogram [185, 96, 89, 89, 57, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:22:40,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:22:40,642 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:22:40,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:22:40,642 INFO L82 PathProgramCache]: Analyzing trace with hash 250203145, now seen corresponding path program 95 times [2021-05-02 13:22:40,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:22:40,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900808711] [2021-05-02 13:22:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:22:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:45,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:22:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 42057 backedges. 17169 proven. 9312 refuted. 0 times theorem prover too weak. 15576 trivial. 0 not checked. [2021-05-02 13:22:45,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:22:45,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900808711] [2021-05-02 13:22:45,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900808711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:45,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379009030] [2021-05-02 13:22:45,914 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 13:22:46,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 123 check-sat command(s) [2021-05-02 13:22:46,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:22:46,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 13:22:46,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:22:46,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:46,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:46,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:46,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:46,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:46,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:46,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:46,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:46,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:46,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:47,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:47,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:47,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:47,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:47,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:47,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:47,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:47,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:47,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:47,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:47,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:47,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:47,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:47,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:47,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:47,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:48,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:48,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:48,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:48,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:48,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:48,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:48,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:48,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:48,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:48,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:48,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:48,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:48,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:48,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:49,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:49,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:49,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:49,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:49,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:49,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:49,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:49,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:49,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:49,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:49,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:49,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:49,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:49,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:50,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:50,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:50,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:50,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:50,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:50,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:50,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:50,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:50,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:50,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:50,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:50,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:50,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:50,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:51,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:51,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:51,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:51,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:51,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:51,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:51,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:51,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:51,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:51,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:51,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:51,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:52,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:52,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:52,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:52,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:52,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:52,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:52,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:52,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:52,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:52,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:52,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:52,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:54,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:54,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:54,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:54,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:54,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:54,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:54,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:54,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:54,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:54,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:54,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:54,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:55,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:55,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:55,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:55,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:55,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:55,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 42057 backedges. 24670 proven. 6909 refuted. 0 times theorem prover too weak. 10478 trivial. 0 not checked. [2021-05-02 13:22:55,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379009030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:55,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:22:55,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 63] total 161 [2021-05-02 13:22:55,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635789575] [2021-05-02 13:22:55,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 161 states [2021-05-02 13:22:55,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:22:55,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2021-05-02 13:22:55,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12722, Invalid=13038, Unknown=0, NotChecked=0, Total=25760 [2021-05-02 13:22:55,880 INFO L87 Difference]: Start difference. First operand 560 states and 681 transitions. Second operand has 161 states, 161 states have (on average 2.782608695652174) internal successors, (448), 160 states have internal predecessors, (448), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:23:18,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:23:18,412 INFO L93 Difference]: Finished difference Result 940 states and 1191 transitions. [2021-05-02 13:23:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-05-02 13:23:18,413 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.782608695652174) internal successors, (448), 160 states have internal predecessors, (448), 2 states have call successors, (4), 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 559 [2021-05-02 13:23:18,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:23:18,415 INFO L225 Difference]: With dead ends: 940 [2021-05-02 13:23:18,415 INFO L226 Difference]: Without dead ends: 578 [2021-05-02 13:23:18,418 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 561 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12499 ImplicationChecksByTransitivity, 34040.4ms TimeCoverageRelationStatistics Valid=38160, Invalid=63282, Unknown=0, NotChecked=0, Total=101442 [2021-05-02 13:23:18,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-05-02 13:23:18,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2021-05-02 13:23:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 573 states have (on average 1.219895287958115) internal successors, (699), 573 states have internal predecessors, (699), 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 13:23:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 703 transitions. [2021-05-02 13:23:18,430 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 703 transitions. Word has length 559 [2021-05-02 13:23:18,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:23:18,442 INFO L480 AbstractCegarLoop]: Abstraction has 578 states and 703 transitions. [2021-05-02 13:23:18,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 161 states, 161 states have (on average 2.782608695652174) internal successors, (448), 160 states have internal predecessors, (448), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:23:18,442 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 703 transitions. [2021-05-02 13:23:18,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2021-05-02 13:23:18,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:23:18,446 INFO L523 BasicCegarLoop]: trace histogram [190, 97, 93, 93, 61, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:23:18,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-05-02 13:23:18,653 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:23:18,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:23:18,653 INFO L82 PathProgramCache]: Analyzing trace with hash 741718914, now seen corresponding path program 96 times [2021-05-02 13:23:18,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:23:18,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346655070] [2021-05-02 13:23:18,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:23:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:23:24,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:23:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:23:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 44656 backedges. 18130 proven. 9506 refuted. 0 times theorem prover too weak. 17020 trivial. 0 not checked. [2021-05-02 13:23:24,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:23:24,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346655070] [2021-05-02 13:23:24,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346655070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:23:24,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001600677] [2021-05-02 13:23:24,152 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 13:23:24,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 131 check-sat command(s) [2021-05-02 13:23:24,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:23:24,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 13:23:24,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:23:25,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:25,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:25,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:25,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:25,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:25,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:25,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:25,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:25,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:25,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:26,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:26,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:26,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:26,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:26,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:26,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:26,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:26,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:26,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:26,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:26,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:26,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:26,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:26,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:26,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:26,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:27,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:27,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:27,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:27,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:27,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:27,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:27,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:27,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:27,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:27,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:27,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:27,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:27,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:27,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:28,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:28,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:28,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:28,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:28,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:28,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:28,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:28,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:28,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:28,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:28,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:28,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:28,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:28,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:29,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:29,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:29,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:29,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:29,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:29,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:29,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:29,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:29,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:29,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:29,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:29,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 44656 backedges. 14202 proven. 2048 refuted. 0 times theorem prover too weak. 28406 trivial. 0 not checked. [2021-05-02 13:23:30,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001600677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:23:30,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:23:30,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 35] total 134 [2021-05-02 13:23:30,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118602696] [2021-05-02 13:23:30,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states [2021-05-02 13:23:30,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:23:30,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-05-02 13:23:30,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 13:23:30,007 INFO L87 Difference]: Start difference. First operand 578 states and 703 transitions. Second operand has 134 states, 134 states have (on average 2.582089552238806) internal successors, (346), 133 states have internal predecessors, (346), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:23:46,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:23:46,152 INFO L93 Difference]: Finished difference Result 964 states and 1220 transitions. [2021-05-02 13:23:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-02 13:23:46,153 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.582089552238806) internal successors, (346), 133 states have internal predecessors, (346), 2 states have call successors, (4), 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 577 [2021-05-02 13:23:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:23:46,155 INFO L225 Difference]: With dead ends: 964 [2021-05-02 13:23:46,155 INFO L226 Difference]: Without dead ends: 586 [2021-05-02 13:23:46,158 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 841 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8612 ImplicationChecksByTransitivity, 24364.9ms TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2021-05-02 13:23:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-05-02 13:23:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2021-05-02 13:23:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 579 states have (on average 1.221070811744387) internal successors, (707), 579 states have internal predecessors, (707), 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 13:23:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 711 transitions. [2021-05-02 13:23:46,170 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 711 transitions. Word has length 577 [2021-05-02 13:23:46,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:23:46,170 INFO L480 AbstractCegarLoop]: Abstraction has 584 states and 711 transitions. [2021-05-02 13:23:46,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 134 states, 134 states have (on average 2.582089552238806) internal successors, (346), 133 states have internal predecessors, (346), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:23:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 711 transitions. [2021-05-02 13:23:46,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2021-05-02 13:23:46,173 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:23:46,173 INFO L523 BasicCegarLoop]: trace histogram [192, 98, 94, 94, 61, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:23:46,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-02 13:23:46,381 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:23:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:23:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash 95353528, now seen corresponding path program 97 times [2021-05-02 13:23:46,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:23:46,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130384347] [2021-05-02 13:23:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:23:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:23:52,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:23:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:23:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 45606 backedges. 18513 proven. 9702 refuted. 0 times theorem prover too weak. 17391 trivial. 0 not checked. [2021-05-02 13:23:52,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:23:52,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130384347] [2021-05-02 13:23:52,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130384347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:23:52,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378970161] [2021-05-02 13:23:52,328 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 13:23:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:23:52,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 100 conjunts are in the unsatisfiable core [2021-05-02 13:23:52,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:23:52,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:52,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 45606 backedges. 18513 proven. 9702 refuted. 0 times theorem prover too weak. 17391 trivial. 0 not checked. [2021-05-02 13:23:53,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378970161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:23:53,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:23:53,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101] total 103 [2021-05-02 13:23:53,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562019806] [2021-05-02 13:23:53,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-02 13:23:53,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:23:53,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-02 13:23:53,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 13:23:53,873 INFO L87 Difference]: Start difference. First operand 584 states and 711 transitions. Second operand has 103 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 102 states have internal predecessors, (214), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:24:03,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:24:03,563 INFO L93 Difference]: Finished difference Result 968 states and 1223 transitions. [2021-05-02 13:24:03,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 13:24:03,564 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 102 states have internal predecessors, (214), 2 states have call successors, (4), 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 583 [2021-05-02 13:24:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:24:03,565 INFO L225 Difference]: With dead ends: 968 [2021-05-02 13:24:03,565 INFO L226 Difference]: Without dead ends: 586 [2021-05-02 13:24:03,567 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5240 ImplicationChecksByTransitivity, 14969.3ms TimeCoverageRelationStatistics Valid=15252, Invalid=25350, Unknown=0, NotChecked=0, Total=40602 [2021-05-02 13:24:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-05-02 13:24:03,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-05-02 13:24:03,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 581 states have (on average 1.2203098106712564) internal successors, (709), 581 states have internal predecessors, (709), 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 13:24:03,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 713 transitions. [2021-05-02 13:24:03,578 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 713 transitions. Word has length 583 [2021-05-02 13:24:03,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:24:03,579 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 713 transitions. [2021-05-02 13:24:03,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 102 states have internal predecessors, (214), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:24:03,579 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 713 transitions. [2021-05-02 13:24:03,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2021-05-02 13:24:03,581 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:24:03,581 INFO L523 BasicCegarLoop]: trace histogram [193, 99, 94, 94, 61, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:24:03,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:03,782 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:24:03,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:24:03,782 INFO L82 PathProgramCache]: Analyzing trace with hash -733926699, now seen corresponding path program 98 times [2021-05-02 13:24:03,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:24:03,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511863363] [2021-05-02 13:24:03,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:24:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat