/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_13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:06:42,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:06:42,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:06:42,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:06:42,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:06:42,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:06:42,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:06:42,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:06:42,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:06:42,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:06:42,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:06:42,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:06:42,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:06:42,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:06:42,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:06:42,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:06:42,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:06:42,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:06:42,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:06:42,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:06:42,875 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 13:06:42,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:06:42,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:06:42,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:06:42,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:06:42,906 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:06:42,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:06:42,907 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:06:42,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:06:42,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:06:42,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:06:42,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:06:42,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:06:42,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:06:42,908 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:06:42,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:06:42,908 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:06:42,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:06:42,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:06:42,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:06:42,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:06:42,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:06:42,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:06:42,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:06:42,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:06:42,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:06:42,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:06:42,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:06:42,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:06:42,910 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:06:43,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:06:43,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:06:43,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:06:43,270 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:06:43,273 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:06:43,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2021-05-02 13:06:43,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38d2a4f91/225ae5346a374379980052c9b7014eef/FLAG977bcbf7d [2021-05-02 13:06:43,709 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:06:43,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2021-05-02 13:06:43,715 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38d2a4f91/225ae5346a374379980052c9b7014eef/FLAG977bcbf7d [2021-05-02 13:06:44,116 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38d2a4f91/225ae5346a374379980052c9b7014eef [2021-05-02 13:06:44,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:06:44,124 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:06:44,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:06:44,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:06:44,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:06:44,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:06:44" (1/1) ... [2021-05-02 13:06:44,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4638c4ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:06:44, skipping insertion in model container [2021-05-02 13:06:44,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:06:44" (1/1) ... [2021-05-02 13:06:44,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:06:44,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:06:44,263 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_13.c[319,332] [2021-05-02 13:06:44,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:06:44,287 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:06:44,298 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_13.c[319,332] [2021-05-02 13:06:44,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:06:44,315 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:06:44,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:06:44 WrapperNode [2021-05-02 13:06:44,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:06:44,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:06:44,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:06:44,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:06:44,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:06:44" (1/1) ... [2021-05-02 13:06:44,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:06:44" (1/1) ... [2021-05-02 13:06:44,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:06:44" (1/1) ... [2021-05-02 13:06:44,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:06:44" (1/1) ... [2021-05-02 13:06:44,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:06:44" (1/1) ... [2021-05-02 13:06:44,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:06:44" (1/1) ... [2021-05-02 13:06:44,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:06:44" (1/1) ... [2021-05-02 13:06:44,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:06:44,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:06:44,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:06:44,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:06:44,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:06:44" (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 13:06:44,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:06:44,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:06:44,501 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:06:44,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:06:44,502 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:06:44,502 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:06:44,502 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:06:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:06:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:06:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:06:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:06:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:06:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:06:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:06:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:06:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:06:44,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:06:44,765 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:06:44,765 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 13:06:44,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:06:44 BoogieIcfgContainer [2021-05-02 13:06:44,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:06:44,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:06:44,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:06:44,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:06:44,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:06:44" (1/3) ... [2021-05-02 13:06:44,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3fe56e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:06:44, skipping insertion in model container [2021-05-02 13:06:44,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:06:44" (2/3) ... [2021-05-02 13:06:44,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3fe56e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:06:44, skipping insertion in model container [2021-05-02 13:06:44,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:06:44" (3/3) ... [2021-05-02 13:06:44,773 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_13.c [2021-05-02 13:06:44,778 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:06:44,781 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:06:44,794 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:06:44,819 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:06:44,822 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:06:44,823 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:06:44,823 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:06:44,823 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:06:44,823 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:06:44,823 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:06:44,823 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:06:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:06:44,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 13:06:44,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:44,861 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:44,862 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:44,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:44,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1168619535, now seen corresponding path program 1 times [2021-05-02 13:06:44,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:44,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585766802] [2021-05-02 13:06:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:45,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:45,146 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 13:06:45,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:45,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585766802] [2021-05-02 13:06:45,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585766802] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:06:45,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:06:45,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:06:45,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331438334] [2021-05-02 13:06:45,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:06:45,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:45,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:06:45,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:06:45,171 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:45,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:45,226 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-05-02 13:06:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:06:45,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 13:06:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:45,234 INFO L225 Difference]: With dead ends: 34 [2021-05-02 13:06:45,235 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 13:06:45,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:06:45,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 13:06:45,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 13:06:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:45,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-05-02 13:06:45,274 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2021-05-02 13:06:45,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:45,274 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-05-02 13:06:45,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:45,275 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-05-02 13:06:45,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 13:06:45,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:45,276 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:45,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:06:45,277 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:45,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:45,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1458605129, now seen corresponding path program 1 times [2021-05-02 13:06:45,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:45,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291677276] [2021-05-02 13:06:45,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:45,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:45,404 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 13:06:45,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:45,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291677276] [2021-05-02 13:06:45,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291677276] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:06:45,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:06:45,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:06:45,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069435003] [2021-05-02 13:06:45,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:06:45,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:45,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:06:45,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:06:45,409 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:45,465 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-05-02 13:06:45,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 13:06:45,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 13:06:45,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:45,466 INFO L225 Difference]: With dead ends: 24 [2021-05-02 13:06:45,467 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 13:06:45,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:06:45,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 13:06:45,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 13:06:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-05-02 13:06:45,473 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2021-05-02 13:06:45,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:45,473 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-05-02 13:06:45,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:45,474 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-05-02 13:06:45,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 13:06:45,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:45,474 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:45,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 13:06:45,475 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:45,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:45,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1316432198, now seen corresponding path program 1 times [2021-05-02 13:06:45,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:45,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585882569] [2021-05-02 13:06:45,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:45,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:06:45,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:45,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585882569] [2021-05-02 13:06:45,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585882569] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:06:45,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:06:45,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:06:45,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249408726] [2021-05-02 13:06:45,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:06:45,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:45,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:06:45,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:06:45,539 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:45,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:45,587 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-02 13:06:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 13:06:45,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 13:06:45,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:45,588 INFO L225 Difference]: With dead ends: 22 [2021-05-02 13:06:45,588 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 13:06:45,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:06:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 13:06:45,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 13:06:45,593 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 13:06:45,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 13:06:45,594 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2021-05-02 13:06:45,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:45,594 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 13:06:45,594 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 13:06:45,594 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 13:06:45,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 13:06:45,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:45,595 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:45,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 13:06:45,595 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:45,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:45,596 INFO L82 PathProgramCache]: Analyzing trace with hash -2119154711, now seen corresponding path program 1 times [2021-05-02 13:06:45,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:45,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996640459] [2021-05-02 13:06:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:45,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:06:45,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:45,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996640459] [2021-05-02 13:06:45,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996640459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:45,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944710049] [2021-05-02 13:06:45,654 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 13:06:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:45,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 13:06:45,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:45,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:45,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:06:45,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944710049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:45,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:45,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 13:06:45,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308836067] [2021-05-02 13:06:45,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:06:45,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:45,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:06:45,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:06:45,817 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:45,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:45,968 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-05-02 13:06:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 13:06:45,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 13:06:45,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:45,971 INFO L225 Difference]: With dead ends: 28 [2021-05-02 13:06:45,972 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 13:06:45,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:06:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 13:06:45,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 13:06:45,976 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 13:06:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 13:06:45,977 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2021-05-02 13:06:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:45,977 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 13:06:45,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 13:06:45,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:06:45,978 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:45,978 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:46,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:46,179 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:46,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:46,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1483121146, now seen corresponding path program 2 times [2021-05-02 13:06:46,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:46,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366519726] [2021-05-02 13:06:46,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:46,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 13:06:46,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:46,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366519726] [2021-05-02 13:06:46,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366519726] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:06:46,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:06:46,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:06:46,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929616178] [2021-05-02 13:06:46,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:06:46,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:46,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:06:46,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:06:46,233 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:46,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:46,295 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-02 13:06:46,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 13:06:46,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 13:06:46,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:46,296 INFO L225 Difference]: With dead ends: 28 [2021-05-02 13:06:46,297 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 13:06:46,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:06:46,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 13:06:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-05-02 13:06:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-05-02 13:06:46,307 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2021-05-02 13:06:46,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:46,307 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-05-02 13:06:46,308 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 13:06:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-05-02 13:06:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 13:06:46,310 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:46,313 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:46,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 13:06:46,314 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:46,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:46,315 INFO L82 PathProgramCache]: Analyzing trace with hash -949567839, now seen corresponding path program 1 times [2021-05-02 13:06:46,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:46,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837659243] [2021-05-02 13:06:46,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:46,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:06:46,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:46,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837659243] [2021-05-02 13:06:46,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837659243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:46,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440522624] [2021-05-02 13:06:46,414 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 13:06:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:46,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 13:06:46,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:46,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:46,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:46,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:46,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:06:46,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440522624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:46,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:46,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 13:06:46,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663131547] [2021-05-02 13:06:46,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 13:06:46,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:46,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 13:06:46,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:06:46,547 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:46,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:46,668 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-05-02 13:06:46,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:06:46,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-02 13:06:46,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:46,670 INFO L225 Difference]: With dead ends: 32 [2021-05-02 13:06:46,671 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 13:06:46,672 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:06:46,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 13:06:46,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 13:06:46,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:46,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-05-02 13:06:46,681 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2021-05-02 13:06:46,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:46,682 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-05-02 13:06:46,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:46,682 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-05-02 13:06:46,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 13:06:46,683 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:46,683 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:46,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:46,907 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:46,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:46,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1087078974, now seen corresponding path program 2 times [2021-05-02 13:06:46,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:46,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059481224] [2021-05-02 13:06:46,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:46,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:06:46,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:46,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059481224] [2021-05-02 13:06:46,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059481224] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:46,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96796583] [2021-05-02 13:06:46,985 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 13:06:47,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:06:47,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:47,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 13:06:47,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:47,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:47,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:47,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:47,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:47,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:47,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:06:47,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96796583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:47,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:47,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 13:06:47,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265420777] [2021-05-02 13:06:47,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:06:47,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:47,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:06:47,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:06:47,125 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:47,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:47,280 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-02 13:06:47,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:06:47,280 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 13:06:47,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:47,281 INFO L225 Difference]: With dead ends: 34 [2021-05-02 13:06:47,281 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 13:06:47,281 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:06:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 13:06:47,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 13:06:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-02 13:06:47,286 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2021-05-02 13:06:47,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:47,286 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-02 13:06:47,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:47,287 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-02 13:06:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 13:06:47,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:47,287 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:47,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:47,511 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:47,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:47,512 INFO L82 PathProgramCache]: Analyzing trace with hash -200420709, now seen corresponding path program 3 times [2021-05-02 13:06:47,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:47,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801335335] [2021-05-02 13:06:47,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:47,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:06:47,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:47,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801335335] [2021-05-02 13:06:47,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801335335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:47,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001321798] [2021-05-02 13:06:47,609 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 13:06:47,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 13:06:47,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:47,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 13:06:47,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:47,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:47,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:47,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:47,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:47,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-05-02 13:06:47,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001321798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:47,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:47,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-05-02 13:06:47,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956923380] [2021-05-02 13:06:47,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:06:47,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:47,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:06:47,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:06:47,784 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:48,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:48,110 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2021-05-02 13:06:48,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:06:48,110 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-02 13:06:48,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:48,111 INFO L225 Difference]: With dead ends: 40 [2021-05-02 13:06:48,111 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 13:06:48,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 310.5ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:06:48,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 13:06:48,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-05-02 13:06:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-05-02 13:06:48,116 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2021-05-02 13:06:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:48,116 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-05-02 13:06:48,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:48,117 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-05-02 13:06:48,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 13:06:48,117 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:48,117 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:48,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:48,329 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:48,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:48,330 INFO L82 PathProgramCache]: Analyzing trace with hash 442818072, now seen corresponding path program 4 times [2021-05-02 13:06:48,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:48,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283945954] [2021-05-02 13:06:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:48,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:06:48,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:48,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283945954] [2021-05-02 13:06:48,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283945954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:48,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559262243] [2021-05-02 13:06:48,465 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 13:06:48,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:06:48,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:48,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 13:06:48,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:48,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:48,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:48,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:48,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:48,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:48,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:48,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:48,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:48,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:48,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:06:48,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559262243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:48,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:48,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 13:06:48,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101202429] [2021-05-02 13:06:48,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:06:48,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:48,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:06:48,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:06:48,601 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:48,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:48,799 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-02 13:06:48,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:06:48,799 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 13:06:48,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:48,800 INFO L225 Difference]: With dead ends: 42 [2021-05-02 13:06:48,800 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 13:06:48,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 185.7ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:06:48,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 13:06:48,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 13:06:48,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:48,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-02 13:06:48,805 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2021-05-02 13:06:48,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:48,805 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-02 13:06:48,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:48,806 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-02 13:06:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 13:06:48,806 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:48,806 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:49,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:49,021 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:49,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:49,021 INFO L82 PathProgramCache]: Analyzing trace with hash -28396363, now seen corresponding path program 5 times [2021-05-02 13:06:49,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:49,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315662238] [2021-05-02 13:06:49,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:49,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:06:49,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:49,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315662238] [2021-05-02 13:06:49,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315662238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:49,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284784998] [2021-05-02 13:06:49,131 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 13:06:49,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 13:06:49,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:49,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 13:06:49,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:49,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:49,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:49,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:49,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:49,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:49,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:49,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:49,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:49,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:49,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:49,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:49,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:06:49,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284784998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:49,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:49,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 13:06:49,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779384977] [2021-05-02 13:06:49,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:06:49,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:49,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:06:49,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:06:49,272 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:49,541 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-05-02 13:06:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:06:49,542 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 13:06:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:49,542 INFO L225 Difference]: With dead ends: 44 [2021-05-02 13:06:49,543 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 13:06:49,543 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2021-05-02 13:06:49,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 13:06:49,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 13:06:49,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-05-02 13:06:49,548 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2021-05-02 13:06:49,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:49,548 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-05-02 13:06:49,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:49,548 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-05-02 13:06:49,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 13:06:49,549 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:49,549 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:49,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:49,769 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:49,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:49,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1893902318, now seen corresponding path program 6 times [2021-05-02 13:06:49,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:49,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747017946] [2021-05-02 13:06:49,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:49,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:06:49,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:49,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747017946] [2021-05-02 13:06:49,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747017946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:49,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789591816] [2021-05-02 13:06:49,898 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 13:06:49,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 13:06:49,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:49,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 13:06:49,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:50,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:50,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:50,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:50,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:50,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:50,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:50,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:50,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:50,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-05-02 13:06:50,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789591816] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:50,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:50,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2021-05-02 13:06:50,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501892115] [2021-05-02 13:06:50,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 13:06:50,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:50,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 13:06:50,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:06:50,088 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:50,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:50,594 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-05-02 13:06:50,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 13:06:50,594 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (4), 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 31 [2021-05-02 13:06:50,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:50,595 INFO L225 Difference]: With dead ends: 49 [2021-05-02 13:06:50,595 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 13:06:50,596 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 491.8ms TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2021-05-02 13:06:50,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 13:06:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-05-02 13:06:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:50,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-02 13:06:50,601 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2021-05-02 13:06:50,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:50,601 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-02 13:06:50,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:50,601 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-02 13:06:50,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 13:06:50,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:50,602 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:50,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:50,805 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:50,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:50,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1251954412, now seen corresponding path program 7 times [2021-05-02 13:06:50,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:50,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204093635] [2021-05-02 13:06:50,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:50,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 13:06:50,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:50,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204093635] [2021-05-02 13:06:50,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204093635] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:50,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905944363] [2021-05-02 13:06:50,912 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 13:06:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:50,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 13:06:50,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:50,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:50,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 13:06:51,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905944363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:51,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:51,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-02 13:06:51,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909005242] [2021-05-02 13:06:51,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:06:51,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:51,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:06:51,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:06:51,072 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:51,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:51,366 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-05-02 13:06:51,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:06:51,367 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-02 13:06:51,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:51,368 INFO L225 Difference]: With dead ends: 50 [2021-05-02 13:06:51,368 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 13:06:51,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 297.1ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:06:51,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 13:06:51,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 13:06:51,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 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 13:06:51,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-05-02 13:06:51,374 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2021-05-02 13:06:51,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:51,374 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-05-02 13:06:51,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:51,375 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-05-02 13:06:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 13:06:51,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:51,376 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:51,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 13:06:51,589 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:51,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:51,590 INFO L82 PathProgramCache]: Analyzing trace with hash 972201943, now seen corresponding path program 8 times [2021-05-02 13:06:51,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:51,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755900962] [2021-05-02 13:06:51,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:51,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 13:06:51,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:51,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755900962] [2021-05-02 13:06:51,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755900962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:51,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754107128] [2021-05-02 13:06:51,724 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 13:06:51,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:06:51,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:51,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 13:06:51,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:51,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 13:06:51,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754107128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:51,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:51,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 13:06:51,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111727185] [2021-05-02 13:06:51,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:06:51,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:51,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:06:51,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:06:51,870 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:52,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:52,216 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-05-02 13:06:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:06:52,217 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-02 13:06:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:52,217 INFO L225 Difference]: With dead ends: 52 [2021-05-02 13:06:52,217 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 13:06:52,218 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 342.0ms TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2021-05-02 13:06:52,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 13:06:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 13:06:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 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 13:06:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-05-02 13:06:52,223 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2021-05-02 13:06:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:52,223 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-05-02 13:06:52,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:52,224 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-05-02 13:06:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 13:06:52,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:52,225 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:52,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:52,441 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:52,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:52,442 INFO L82 PathProgramCache]: Analyzing trace with hash -507254310, now seen corresponding path program 9 times [2021-05-02 13:06:52,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:52,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059906895] [2021-05-02 13:06:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:52,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 13:06:52,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:52,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059906895] [2021-05-02 13:06:52,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059906895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:52,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672440770] [2021-05-02 13:06:52,594 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 13:06:52,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 13:06:52,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:52,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 13:06:52,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:52,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:52,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:52,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:52,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:52,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:52,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:52,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:52,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:52,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:52,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:52,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-05-02 13:06:52,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672440770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:52,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:52,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2021-05-02 13:06:52,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380855104] [2021-05-02 13:06:52,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 13:06:52,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:52,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 13:06:52,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:06:52,809 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:53,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:53,465 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-05-02 13:06:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 13:06:53,466 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-02 13:06:53,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:53,467 INFO L225 Difference]: With dead ends: 57 [2021-05-02 13:06:53,468 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 13:06:53,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 676.3ms TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 13:06:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 13:06:53,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-05-02 13:06:53,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-05-02 13:06:53,481 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 38 [2021-05-02 13:06:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:53,482 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-05-02 13:06:53,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-05-02 13:06:53,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 13:06:53,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:53,484 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:53,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:53,689 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:53,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:53,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1963681766, now seen corresponding path program 10 times [2021-05-02 13:06:53,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:53,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921069570] [2021-05-02 13:06:53,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:53,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 13:06:53,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:53,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921069570] [2021-05-02 13:06:53,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921069570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:53,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626067702] [2021-05-02 13:06:53,832 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 13:06:53,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:06:53,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:53,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 13:06:53,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:53,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 13:06:53,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626067702] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:53,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:53,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 13:06:53,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937107113] [2021-05-02 13:06:53,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 13:06:53,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:53,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 13:06:53,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:06:53,992 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:54,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:54,372 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-05-02 13:06:54,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 13:06:54,372 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-02 13:06:54,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:54,373 INFO L225 Difference]: With dead ends: 58 [2021-05-02 13:06:54,373 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 13:06:54,373 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 392.1ms TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2021-05-02 13:06:54,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 13:06:54,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 13:06:54,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-05-02 13:06:54,379 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2021-05-02 13:06:54,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:54,379 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-05-02 13:06:54,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:54,379 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-05-02 13:06:54,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 13:06:54,380 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:54,380 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:54,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 13:06:54,603 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:54,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:54,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1402398659, now seen corresponding path program 11 times [2021-05-02 13:06:54,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:54,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574375776] [2021-05-02 13:06:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:54,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 13:06:54,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:54,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574375776] [2021-05-02 13:06:54,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574375776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:54,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832965145] [2021-05-02 13:06:54,765 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 13:06:54,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-02 13:06:54,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:54,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 13:06:54,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:54,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 13:06:54,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832965145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:54,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:54,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-05-02 13:06:54,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161138071] [2021-05-02 13:06:54,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 13:06:54,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:54,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 13:06:54,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:06:54,916 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:55,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:55,348 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-05-02 13:06:55,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 13:06:55,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-02 13:06:55,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:55,349 INFO L225 Difference]: With dead ends: 60 [2021-05-02 13:06:55,350 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 13:06:55,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 448.9ms TimeCoverageRelationStatistics Valid=331, Invalid=539, Unknown=0, NotChecked=0, Total=870 [2021-05-02 13:06:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 13:06:55,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 13:06:55,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:55,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-05-02 13:06:55,354 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2021-05-02 13:06:55,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:55,354 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-05-02 13:06:55,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:55,355 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-05-02 13:06:55,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 13:06:55,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:55,355 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:55,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 13:06:55,579 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:55,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:55,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1119755168, now seen corresponding path program 12 times [2021-05-02 13:06:55,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:55,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710193399] [2021-05-02 13:06:55,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:55,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 13:06:55,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:55,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710193399] [2021-05-02 13:06:55,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710193399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:55,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271083422] [2021-05-02 13:06:55,732 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 13:06:55,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 13:06:55,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:55,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 13:06:55,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:55,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:55,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:55,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:55,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:55,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:55,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:55,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:55,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:55,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:55,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:55,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:55,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:55,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-05-02 13:06:55,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271083422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:55,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:55,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 23 [2021-05-02 13:06:55,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536284019] [2021-05-02 13:06:55,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 13:06:55,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:55,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 13:06:55,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-05-02 13:06:55,946 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:56,691 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-05-02 13:06:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 13:06:56,691 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (4), 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 13:06:56,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:56,692 INFO L225 Difference]: With dead ends: 65 [2021-05-02 13:06:56,692 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 13:06:56,692 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 801.4ms TimeCoverageRelationStatistics Valid=553, Invalid=1253, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 13:06:56,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 13:06:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-05-02 13:06:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-05-02 13:06:56,702 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 45 [2021-05-02 13:06:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:56,702 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-05-02 13:06:56,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:56,702 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-05-02 13:06:56,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 13:06:56,703 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:56,703 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:56,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 13:06:56,917 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:56,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:56,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1643918010, now seen corresponding path program 13 times [2021-05-02 13:06:56,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:56,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988185995] [2021-05-02 13:06:56,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:57,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 13:06:57,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:57,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988185995] [2021-05-02 13:06:57,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988185995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:57,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843176632] [2021-05-02 13:06:57,107 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 13:06:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:57,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 13:06:57,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:57,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 13:06:57,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843176632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:57,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:57,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-02 13:06:57,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39307530] [2021-05-02 13:06:57,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 13:06:57,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:57,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 13:06:57,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:06:57,323 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:57,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:57,805 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2021-05-02 13:06:57,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 13:06:57,806 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-02 13:06:57,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:57,806 INFO L225 Difference]: With dead ends: 66 [2021-05-02 13:06:57,806 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 13:06:57,807 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=426, Invalid=696, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 13:06:57,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 13:06:57,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-02 13:06:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 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 13:06:57,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-05-02 13:06:57,813 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2021-05-02 13:06:57,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:57,813 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-05-02 13:06:57,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:57,813 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-05-02 13:06:57,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 13:06:57,814 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:57,814 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:58,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:58,040 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:58,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:58,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1077990711, now seen corresponding path program 14 times [2021-05-02 13:06:58,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:58,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969015105] [2021-05-02 13:06:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:58,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 13:06:58,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:58,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969015105] [2021-05-02 13:06:58,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969015105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:58,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091176323] [2021-05-02 13:06:58,264 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 13:06:58,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:06:58,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:58,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:06:58,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:58,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 13:06:58,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091176323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:58,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:58,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-02 13:06:58,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041986668] [2021-05-02 13:06:58,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 13:06:58,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:58,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 13:06:58,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 13:06:58,446 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:58,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:58,977 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2021-05-02 13:06:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 13:06:58,977 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-02 13:06:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:58,979 INFO L225 Difference]: With dead ends: 68 [2021-05-02 13:06:58,979 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 13:06:58,980 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 581.8ms TimeCoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 13:06:58,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 13:06:58,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 13:06:58,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-05-02 13:06:58,986 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2021-05-02 13:06:58,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:58,986 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-05-02 13:06:58,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:58,986 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-05-02 13:06:58,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 13:06:58,988 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:58,988 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:59,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:59,211 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:59,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1612264332, now seen corresponding path program 15 times [2021-05-02 13:06:59,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:59,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991903319] [2021-05-02 13:06:59,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:59,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 13:06:59,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:59,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991903319] [2021-05-02 13:06:59,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991903319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:59,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638461154] [2021-05-02 13:06:59,419 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 13:06:59,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 13:06:59,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:59,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 13:06:59,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:59,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:59,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:59,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:59,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-05-02 13:06:59,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638461154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:59,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:59,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 4] total 22 [2021-05-02 13:06:59,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851720510] [2021-05-02 13:06:59,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 13:06:59,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:59,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 13:06:59,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:06:59,591 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:00,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:00,230 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2021-05-02 13:07:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 13:07:00,231 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-02 13:07:00,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:00,233 INFO L225 Difference]: With dead ends: 73 [2021-05-02 13:07:00,233 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 13:07:00,234 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 682.4ms TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 13:07:00,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 13:07:00,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 13:07:00,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:00,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-05-02 13:07:00,240 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 52 [2021-05-02 13:07:00,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:00,240 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-05-02 13:07:00,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:00,240 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-05-02 13:07:00,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 13:07:00,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:00,241 INFO L523 BasicCegarLoop]: trace histogram [19, 17, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:00,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:07:00,442 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:00,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1688001364, now seen corresponding path program 16 times [2021-05-02 13:07:00,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:00,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229426097] [2021-05-02 13:07:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:00,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 13:07:00,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:00,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229426097] [2021-05-02 13:07:00,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229426097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:00,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787669260] [2021-05-02 13:07:00,684 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 13:07:00,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:07:00,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:00,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:07:00,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:00,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 13:07:00,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787669260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:00,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:00,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-02 13:07:00,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701404897] [2021-05-02 13:07:00,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 13:07:00,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:00,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 13:07:00,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:07:00,875 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:01,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:01,475 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-05-02 13:07:01,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 13:07:01,475 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-02 13:07:01,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:01,476 INFO L225 Difference]: With dead ends: 76 [2021-05-02 13:07:01,476 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 13:07:01,477 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 683.4ms TimeCoverageRelationStatistics Valid=591, Invalid=969, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 13:07:01,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 13:07:01,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 13:07:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:01,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-05-02 13:07:01,484 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 56 [2021-05-02 13:07:01,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:01,485 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-05-02 13:07:01,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:01,485 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-05-02 13:07:01,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 13:07:01,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:01,486 INFO L523 BasicCegarLoop]: trace histogram [20, 18, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:01,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 13:07:01,701 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:01,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:01,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1454376407, now seen corresponding path program 17 times [2021-05-02 13:07:01,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:01,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950959728] [2021-05-02 13:07:01,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:01,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 13:07:01,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:01,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950959728] [2021-05-02 13:07:01,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950959728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:01,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19488394] [2021-05-02 13:07:01,931 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 13:07:01,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-05-02 13:07:01,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:01,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 13:07:01,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:02,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 13:07:02,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19488394] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:02,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:02,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2021-05-02 13:07:02,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416186598] [2021-05-02 13:07:02,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 13:07:02,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:02,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 13:07:02,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 13:07:02,129 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:02,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:02,763 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-05-02 13:07:02,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 13:07:02,764 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-02 13:07:02,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:02,765 INFO L225 Difference]: With dead ends: 78 [2021-05-02 13:07:02,765 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 13:07:02,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 691.7ms TimeCoverageRelationStatistics Valid=652, Invalid=1070, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 13:07:02,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 13:07:02,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 13:07:02,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:02,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-05-02 13:07:02,771 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 58 [2021-05-02 13:07:02,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:02,771 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-05-02 13:07:02,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:02,771 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-05-02 13:07:02,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 13:07:02,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:02,772 INFO L523 BasicCegarLoop]: trace histogram [21, 19, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:02,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 13:07:02,997 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:02,997 INFO L82 PathProgramCache]: Analyzing trace with hash 279092122, now seen corresponding path program 18 times [2021-05-02 13:07:02,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:02,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724502345] [2021-05-02 13:07:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:03,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-02 13:07:03,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:03,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724502345] [2021-05-02 13:07:03,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724502345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:03,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114790631] [2021-05-02 13:07:03,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:07:03,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 13:07:03,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:03,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 13:07:03,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:03,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:03,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:03,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:03,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:03,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:03,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:03,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:03,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:03,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:03,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:03,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:03,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:03,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:03,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:03,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:03,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:03,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-05-02 13:07:03,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114790631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:03,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:03,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 9] total 30 [2021-05-02 13:07:03,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73154672] [2021-05-02 13:07:03,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 13:07:03,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:03,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 13:07:03,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-05-02 13:07:03,556 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:04,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:04,718 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2021-05-02 13:07:04,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 13:07:04,718 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-02 13:07:04,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:04,719 INFO L225 Difference]: With dead ends: 87 [2021-05-02 13:07:04,719 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 13:07:04,719 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1255.9ms TimeCoverageRelationStatistics Valid=918, Invalid=2274, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 13:07:04,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 13:07:04,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-05-02 13:07:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:04,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-05-02 13:07:04,725 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 60 [2021-05-02 13:07:04,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:04,726 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-05-02 13:07:04,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-05-02 13:07:04,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 13:07:04,726 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:04,727 INFO L523 BasicCegarLoop]: trace histogram [22, 20, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:04,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 13:07:04,950 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:04,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:04,951 INFO L82 PathProgramCache]: Analyzing trace with hash -223278490, now seen corresponding path program 19 times [2021-05-02 13:07:04,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:04,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564076447] [2021-05-02 13:07:04,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:05,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:05,214 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 13:07:05,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:05,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564076447] [2021-05-02 13:07:05,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564076447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:05,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515832648] [2021-05-02 13:07:05,214 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 13:07:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:05,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 13:07:05,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:05,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 13:07:05,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515832648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:05,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:05,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-02 13:07:05,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90336442] [2021-05-02 13:07:05,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 13:07:05,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:05,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 13:07:05,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 13:07:05,407 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:06,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:06,091 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-05-02 13:07:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 13:07:06,091 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-02 13:07:06,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:06,092 INFO L225 Difference]: With dead ends: 84 [2021-05-02 13:07:06,092 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 13:07:06,093 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 818.3ms TimeCoverageRelationStatistics Valid=783, Invalid=1287, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 13:07:06,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 13:07:06,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-05-02 13:07:06,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:06,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-05-02 13:07:06,101 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 63 [2021-05-02 13:07:06,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:06,101 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-05-02 13:07:06,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:06,101 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-05-02 13:07:06,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 13:07:06,102 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:06,102 INFO L523 BasicCegarLoop]: trace histogram [23, 21, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:06,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 13:07:06,317 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:06,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:06,318 INFO L82 PathProgramCache]: Analyzing trace with hash 785684099, now seen corresponding path program 20 times [2021-05-02 13:07:06,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:06,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497274067] [2021-05-02 13:07:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:06,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 13:07:06,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:06,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497274067] [2021-05-02 13:07:06,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497274067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:06,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624751953] [2021-05-02 13:07:06,626 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 13:07:06,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:07:06,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:06,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:07:06,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:06,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 13:07:06,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624751953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:06,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:06,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2021-05-02 13:07:06,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258642439] [2021-05-02 13:07:06,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 13:07:06,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:06,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 13:07:06,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 13:07:06,817 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:07,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:07,694 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-05-02 13:07:07,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 13:07:07,695 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-05-02 13:07:07,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:07,696 INFO L225 Difference]: With dead ends: 86 [2021-05-02 13:07:07,696 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 13:07:07,697 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 961.9ms TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 13:07:07,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 13:07:07,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 13:07:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:07,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2021-05-02 13:07:07,703 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 65 [2021-05-02 13:07:07,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:07,703 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2021-05-02 13:07:07,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2021-05-02 13:07:07,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 13:07:07,704 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:07,704 INFO L523 BasicCegarLoop]: trace histogram [24, 22, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:07,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 13:07:07,927 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:07,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:07,928 INFO L82 PathProgramCache]: Analyzing trace with hash -263876768, now seen corresponding path program 21 times [2021-05-02 13:07:07,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:07,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777719113] [2021-05-02 13:07:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:08,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 13:07:08,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:08,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777719113] [2021-05-02 13:07:08,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777719113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:08,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143675430] [2021-05-02 13:07:08,256 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 13:07:08,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 13:07:08,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:08,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 13:07:08,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:08,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 70 proven. 28 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-05-02 13:07:08,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143675430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:08,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:08,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2021-05-02 13:07:08,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959705986] [2021-05-02 13:07:08,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 13:07:08,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:08,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 13:07:08,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=776, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 13:07:08,599 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:09,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:09,883 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-05-02 13:07:09,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 13:07:09,883 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (4), 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 67 [2021-05-02 13:07:09,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:09,884 INFO L225 Difference]: With dead ends: 95 [2021-05-02 13:07:09,884 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 13:07:09,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1534.8ms TimeCoverageRelationStatistics Valid=1216, Invalid=2944, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 13:07:09,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 13:07:09,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-05-02 13:07:09,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-05-02 13:07:09,890 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 67 [2021-05-02 13:07:09,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:09,890 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-05-02 13:07:09,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:09,891 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-05-02 13:07:09,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 13:07:09,891 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:09,891 INFO L523 BasicCegarLoop]: trace histogram [25, 23, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:10,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:07:10,092 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:10,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:10,093 INFO L82 PathProgramCache]: Analyzing trace with hash 339418630, now seen corresponding path program 22 times [2021-05-02 13:07:10,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:10,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258302242] [2021-05-02 13:07:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:10,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-05-02 13:07:10,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:10,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258302242] [2021-05-02 13:07:10,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258302242] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:10,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505194228] [2021-05-02 13:07:10,407 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 13:07:10,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:07:10,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:10,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 13:07:10,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:10,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-05-02 13:07:10,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505194228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:10,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:10,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-02 13:07:10,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160802876] [2021-05-02 13:07:10,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 13:07:10,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:10,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 13:07:10,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 13:07:10,616 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:11,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:11,433 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2021-05-02 13:07:11,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 13:07:11,434 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-02 13:07:11,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:11,435 INFO L225 Difference]: With dead ends: 92 [2021-05-02 13:07:11,435 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 13:07:11,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 919.7ms TimeCoverageRelationStatistics Valid=1002, Invalid=1650, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 13:07:11,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 13:07:11,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 13:07:11,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:11,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-05-02 13:07:11,441 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 70 [2021-05-02 13:07:11,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:11,441 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-05-02 13:07:11,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:11,442 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-05-02 13:07:11,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 13:07:11,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:11,442 INFO L523 BasicCegarLoop]: trace histogram [26, 24, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:11,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 13:07:11,649 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:11,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:11,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1673799497, now seen corresponding path program 23 times [2021-05-02 13:07:11,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:11,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853198522] [2021-05-02 13:07:11,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:11,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-05-02 13:07:11,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:11,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853198522] [2021-05-02 13:07:11,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853198522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:11,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914478742] [2021-05-02 13:07:11,989 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 13:07:12,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2021-05-02 13:07:12,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:12,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:07:12,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:12,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-05-02 13:07:12,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914478742] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:12,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:12,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2021-05-02 13:07:12,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919103894] [2021-05-02 13:07:12,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 13:07:12,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:12,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 13:07:12,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 13:07:12,216 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:13,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:13,055 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2021-05-02 13:07:13,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 13:07:13,056 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-02 13:07:13,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:13,056 INFO L225 Difference]: With dead ends: 94 [2021-05-02 13:07:13,056 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 13:07:13,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 975.1ms TimeCoverageRelationStatistics Valid=1081, Invalid=1781, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 13:07:13,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 13:07:13,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-02 13:07:13,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-05-02 13:07:13,063 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 72 [2021-05-02 13:07:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:13,063 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-05-02 13:07:13,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:13,063 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-05-02 13:07:13,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 13:07:13,064 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:13,064 INFO L523 BasicCegarLoop]: trace histogram [27, 25, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:13,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:07:13,277 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:13,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:13,277 INFO L82 PathProgramCache]: Analyzing trace with hash -181408820, now seen corresponding path program 24 times [2021-05-02 13:07:13,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:13,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389528070] [2021-05-02 13:07:13,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:13,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-05-02 13:07:13,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:13,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389528070] [2021-05-02 13:07:13,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389528070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:13,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923526704] [2021-05-02 13:07:13,650 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 13:07:13,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-02 13:07:13,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:13,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 13:07:13,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:13,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:13,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 79 proven. 36 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-05-02 13:07:14,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923526704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:14,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:14,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11] total 38 [2021-05-02 13:07:14,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337745148] [2021-05-02 13:07:14,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 13:07:14,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:14,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 13:07:14,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=972, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 13:07:14,006 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:15,536 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-05-02 13:07:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 13:07:15,537 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-02 13:07:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:15,537 INFO L225 Difference]: With dead ends: 103 [2021-05-02 13:07:15,537 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 13:07:15,539 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1741.4ms TimeCoverageRelationStatistics Valid=1556, Invalid=3700, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 13:07:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 13:07:15,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2021-05-02 13:07:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-05-02 13:07:15,543 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 74 [2021-05-02 13:07:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:15,544 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-05-02 13:07:15,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:15,544 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-05-02 13:07:15,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 13:07:15,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:15,544 INFO L523 BasicCegarLoop]: trace histogram [28, 26, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:15,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 13:07:15,745 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:15,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:15,746 INFO L82 PathProgramCache]: Analyzing trace with hash 2129992116, now seen corresponding path program 25 times [2021-05-02 13:07:15,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:15,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208945299] [2021-05-02 13:07:15,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:16,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-02 13:07:16,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:16,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208945299] [2021-05-02 13:07:16,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208945299] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:16,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86425273] [2021-05-02 13:07:16,114 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 13:07:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:16,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 13:07:16,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:16,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-02 13:07:16,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86425273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:16,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:16,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-02 13:07:16,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234616361] [2021-05-02 13:07:16,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 13:07:16,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:16,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 13:07:16,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 13:07:16,333 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:17,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:17,238 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-05-02 13:07:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 13:07:17,239 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-02 13:07:17,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:17,239 INFO L225 Difference]: With dead ends: 100 [2021-05-02 13:07:17,239 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 13:07:17,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1092.2ms TimeCoverageRelationStatistics Valid=1248, Invalid=2058, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 13:07:17,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 13:07:17,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-02 13:07:17,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:17,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2021-05-02 13:07:17,249 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 77 [2021-05-02 13:07:17,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:17,249 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2021-05-02 13:07:17,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:17,249 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2021-05-02 13:07:17,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 13:07:17,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:17,250 INFO L523 BasicCegarLoop]: trace histogram [29, 27, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:17,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:07:17,465 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:17,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:17,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1842261777, now seen corresponding path program 26 times [2021-05-02 13:07:17,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:17,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012976981] [2021-05-02 13:07:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:17,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-02 13:07:17,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:17,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012976981] [2021-05-02 13:07:17,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012976981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:17,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023221947] [2021-05-02 13:07:17,858 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 13:07:17,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:07:17,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:17,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 13:07:17,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:17,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-02 13:07:18,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023221947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:18,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:18,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2021-05-02 13:07:18,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907890945] [2021-05-02 13:07:18,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 13:07:18,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:18,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 13:07:18,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 13:07:18,067 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:19,011 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2021-05-02 13:07:19,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 13:07:19,011 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-02 13:07:19,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:19,012 INFO L225 Difference]: With dead ends: 102 [2021-05-02 13:07:19,012 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 13:07:19,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1162.7ms TimeCoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 13:07:19,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 13:07:19,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-02 13:07:19,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2021-05-02 13:07:19,019 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 79 [2021-05-02 13:07:19,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:19,019 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2021-05-02 13:07:19,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:19,020 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2021-05-02 13:07:19,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 13:07:19,020 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:19,020 INFO L523 BasicCegarLoop]: trace histogram [30, 28, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:19,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-02 13:07:19,225 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:19,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:19,225 INFO L82 PathProgramCache]: Analyzing trace with hash 211312942, now seen corresponding path program 27 times [2021-05-02 13:07:19,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:19,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109930791] [2021-05-02 13:07:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:19,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-02 13:07:19,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:19,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109930791] [2021-05-02 13:07:19,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109930791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:19,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473356532] [2021-05-02 13:07:19,666 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 13:07:19,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-02 13:07:19,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:19,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 13:07:19,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:19,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 88 proven. 45 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-05-02 13:07:20,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473356532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:20,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:20,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2021-05-02 13:07:20,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572300848] [2021-05-02 13:07:20,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 13:07:20,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:20,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 13:07:20,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1190, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 13:07:20,068 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:21,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:21,780 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2021-05-02 13:07:21,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 13:07:21,781 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-05-02 13:07:21,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:21,781 INFO L225 Difference]: With dead ends: 111 [2021-05-02 13:07:21,781 INFO L226 Difference]: Without dead ends: 91 [2021-05-02 13:07:21,783 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 2004.5ms TimeCoverageRelationStatistics Valid=1938, Invalid=4542, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 13:07:21,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-02 13:07:21,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-05-02 13:07:21,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:21,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-05-02 13:07:21,791 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 81 [2021-05-02 13:07:21,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:21,791 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-05-02 13:07:21,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 41 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:21,792 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-05-02 13:07:21,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 13:07:21,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:21,792 INFO L523 BasicCegarLoop]: trace histogram [31, 29, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:21,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:07:21,997 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:21,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:21,998 INFO L82 PathProgramCache]: Analyzing trace with hash -635419464, now seen corresponding path program 28 times [2021-05-02 13:07:21,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:21,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163628536] [2021-05-02 13:07:21,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:22,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-05-02 13:07:22,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:22,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163628536] [2021-05-02 13:07:22,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163628536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:22,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254803121] [2021-05-02 13:07:22,469 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 13:07:22,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:07:22,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:22,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:07:22,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:22,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-05-02 13:07:22,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254803121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:22,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:22,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-02 13:07:22,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139555665] [2021-05-02 13:07:22,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 13:07:22,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:22,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 13:07:22,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 13:07:22,708 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:23,812 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2021-05-02 13:07:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 13:07:23,812 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-02 13:07:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:23,813 INFO L225 Difference]: With dead ends: 108 [2021-05-02 13:07:23,813 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 13:07:23,814 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1316.0ms TimeCoverageRelationStatistics Valid=1521, Invalid=2511, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 13:07:23,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 13:07:23,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-02 13:07:23,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2021-05-02 13:07:23,821 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 84 [2021-05-02 13:07:23,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:23,821 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2021-05-02 13:07:23,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:23,821 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2021-05-02 13:07:23,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 13:07:23,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:23,822 INFO L523 BasicCegarLoop]: trace histogram [32, 30, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:24,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 13:07:24,037 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:24,037 INFO L82 PathProgramCache]: Analyzing trace with hash 17980603, now seen corresponding path program 29 times [2021-05-02 13:07:24,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:24,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167020150] [2021-05-02 13:07:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:24,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-05-02 13:07:24,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:24,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167020150] [2021-05-02 13:07:24,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167020150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:24,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410991230] [2021-05-02 13:07:24,542 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 13:07:24,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2021-05-02 13:07:24,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:24,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 13:07:24,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:24,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-05-02 13:07:24,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410991230] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:24,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:24,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2021-05-02 13:07:24,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093987994] [2021-05-02 13:07:24,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 13:07:24,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:24,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 13:07:24,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 13:07:24,802 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:25,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:25,908 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2021-05-02 13:07:25,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 13:07:25,909 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-02 13:07:25,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:25,909 INFO L225 Difference]: With dead ends: 110 [2021-05-02 13:07:25,909 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 13:07:25,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1383.4ms TimeCoverageRelationStatistics Valid=1618, Invalid=2672, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 13:07:25,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 13:07:25,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-02 13:07:25,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 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 13:07:25,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-05-02 13:07:25,917 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 86 [2021-05-02 13:07:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:25,918 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-05-02 13:07:25,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-05-02 13:07:25,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 13:07:25,918 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:25,918 INFO L523 BasicCegarLoop]: trace histogram [33, 31, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:26,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:07:26,129 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:26,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:26,130 INFO L82 PathProgramCache]: Analyzing trace with hash 870219774, now seen corresponding path program 30 times [2021-05-02 13:07:26,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:26,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859650871] [2021-05-02 13:07:26,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:26,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-05-02 13:07:26,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:26,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859650871] [2021-05-02 13:07:26,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859650871] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:26,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83689961] [2021-05-02 13:07:26,679 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 13:07:26,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-02 13:07:26,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:26,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 13:07:26,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:26,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:26,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:26,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:26,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:26,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:26,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 155 proven. 4 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2021-05-02 13:07:26,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83689961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:26,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:26,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 5] total 38 [2021-05-02 13:07:26,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76012500] [2021-05-02 13:07:26,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 13:07:26,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:26,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 13:07:26,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 13:07:26,948 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:28,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:28,325 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2021-05-02 13:07:28,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 13:07:28,325 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-02 13:07:28,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:28,326 INFO L225 Difference]: With dead ends: 115 [2021-05-02 13:07:28,326 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 13:07:28,327 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1764.0ms TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 13:07:28,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 13:07:28,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-05-02 13:07:28,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 88 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:28,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2021-05-02 13:07:28,335 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 88 [2021-05-02 13:07:28,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:28,335 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2021-05-02 13:07:28,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2021-05-02 13:07:28,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 13:07:28,336 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:28,336 INFO L523 BasicCegarLoop]: trace histogram [35, 32, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:28,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 13:07:28,545 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:28,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:28,545 INFO L82 PathProgramCache]: Analyzing trace with hash -619474106, now seen corresponding path program 31 times [2021-05-02 13:07:28,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:28,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271939080] [2021-05-02 13:07:28,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:29,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 165 proven. 1056 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-05-02 13:07:29,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:29,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271939080] [2021-05-02 13:07:29,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271939080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:29,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055311630] [2021-05-02 13:07:29,082 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 13:07:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:29,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:07:29,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:29,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 165 proven. 1056 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-05-02 13:07:29,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055311630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:29,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:29,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-05-02 13:07:29,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103735705] [2021-05-02 13:07:29,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 13:07:29,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:29,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 13:07:29,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 13:07:29,306 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:30,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:30,596 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2021-05-02 13:07:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 13:07:30,597 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-02 13:07:30,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:30,597 INFO L225 Difference]: With dead ends: 118 [2021-05-02 13:07:30,597 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 13:07:30,598 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1532.6ms TimeCoverageRelationStatistics Valid=1821, Invalid=3009, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 13:07:30,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 13:07:30,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 13:07:30,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0555555555555556) internal successors, (95), 90 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2021-05-02 13:07:30,604 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 92 [2021-05-02 13:07:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:30,604 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2021-05-02 13:07:30,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2021-05-02 13:07:30,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 13:07:30,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:30,605 INFO L523 BasicCegarLoop]: trace histogram [36, 33, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:30,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 13:07:30,809 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:30,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:30,810 INFO L82 PathProgramCache]: Analyzing trace with hash 389740617, now seen corresponding path program 32 times [2021-05-02 13:07:30,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:30,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424640299] [2021-05-02 13:07:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:31,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 170 proven. 1122 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-05-02 13:07:31,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:31,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424640299] [2021-05-02 13:07:31,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424640299] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:31,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370892282] [2021-05-02 13:07:31,354 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 13:07:31,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:07:31,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:31,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 13:07:31,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:31,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 170 proven. 1122 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-05-02 13:07:31,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370892282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:31,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:31,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2021-05-02 13:07:31,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829854200] [2021-05-02 13:07:31,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 13:07:31,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:31,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 13:07:31,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 13:07:31,603 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:32,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:32,919 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2021-05-02 13:07:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 13:07:32,920 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-02 13:07:32,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:32,920 INFO L225 Difference]: With dead ends: 120 [2021-05-02 13:07:32,920 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 13:07:32,921 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1600.3ms TimeCoverageRelationStatistics Valid=1927, Invalid=3185, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 13:07:32,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 13:07:32,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-05-02 13:07:32,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0543478260869565) internal successors, (97), 92 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2021-05-02 13:07:32,928 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 94 [2021-05-02 13:07:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:32,929 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2021-05-02 13:07:32,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 37 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2021-05-02 13:07:32,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 13:07:32,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:32,930 INFO L523 BasicCegarLoop]: trace histogram [37, 34, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:33,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 13:07:33,133 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:33,133 INFO L82 PathProgramCache]: Analyzing trace with hash -417519476, now seen corresponding path program 33 times [2021-05-02 13:07:33,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:33,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041106246] [2021-05-02 13:07:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:33,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 175 proven. 1190 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-05-02 13:07:33,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:33,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041106246] [2021-05-02 13:07:33,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041106246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:33,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958764456] [2021-05-02 13:07:33,750 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 13:07:33,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-02 13:07:33,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:33,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 13:07:33,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:33,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 179 proven. 55 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2021-05-02 13:07:34,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958764456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:34,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:34,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 13] total 49 [2021-05-02 13:07:34,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302073739] [2021-05-02 13:07:34,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 13:07:34,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:34,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 13:07:34,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=1607, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 13:07:34,219 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:36,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:36,395 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2021-05-02 13:07:36,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 13:07:36,395 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-02 13:07:36,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:36,396 INFO L225 Difference]: With dead ends: 135 [2021-05-02 13:07:36,396 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 13:07:36,397 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 2641.3ms TimeCoverageRelationStatistics Valid=2579, Invalid=6351, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 13:07:36,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 13:07:36,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2021-05-02 13:07:36,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 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 13:07:36,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-05-02 13:07:36,406 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 96 [2021-05-02 13:07:36,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:36,406 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-05-02 13:07:36,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:36,406 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-05-02 13:07:36,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 13:07:36,407 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:36,407 INFO L523 BasicCegarLoop]: trace histogram [38, 35, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:36,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 13:07:36,629 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:36,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:36,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1586204364, now seen corresponding path program 34 times [2021-05-02 13:07:36,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:36,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707343957] [2021-05-02 13:07:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:37,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 13:07:37,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:37,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707343957] [2021-05-02 13:07:37,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707343957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:37,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984365843] [2021-05-02 13:07:37,326 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 13:07:37,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:07:37,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:37,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 13:07:37,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:37,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 13:07:37,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984365843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:37,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:37,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-05-02 13:07:37,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896494019] [2021-05-02 13:07:37,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 13:07:37,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:37,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 13:07:37,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 13:07:37,595 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:38,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:38,980 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2021-05-02 13:07:38,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 13:07:38,980 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-02 13:07:38,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:38,981 INFO L225 Difference]: With dead ends: 126 [2021-05-02 13:07:38,981 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 13:07:38,981 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1851.0ms TimeCoverageRelationStatistics Valid=2148, Invalid=3552, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 13:07:38,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 13:07:38,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-05-02 13:07:38,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:38,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-05-02 13:07:38,992 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2021-05-02 13:07:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:38,992 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-05-02 13:07:38,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:38,992 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-05-02 13:07:38,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 13:07:38,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:38,993 INFO L523 BasicCegarLoop]: trace histogram [39, 36, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:39,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 13:07:39,210 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:39,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:39,211 INFO L82 PathProgramCache]: Analyzing trace with hash -909839663, now seen corresponding path program 35 times [2021-05-02 13:07:39,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:39,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521462491] [2021-05-02 13:07:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:39,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 13:07:39,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:39,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521462491] [2021-05-02 13:07:39,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521462491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:39,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249735968] [2021-05-02 13:07:39,885 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 13:07:39,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-05-02 13:07:39,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:39,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 13:07:39,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:39,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:39,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 13:07:40,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249735968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:40,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:40,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2021-05-02 13:07:40,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712999545] [2021-05-02 13:07:40,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 13:07:40,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:40,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 13:07:40,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 13:07:40,163 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:41,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:41,620 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2021-05-02 13:07:41,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 13:07:41,621 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-05-02 13:07:41,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:41,622 INFO L225 Difference]: With dead ends: 128 [2021-05-02 13:07:41,622 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 13:07:41,623 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1851.7ms TimeCoverageRelationStatistics Valid=2263, Invalid=3743, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 13:07:41,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 13:07:41,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-05-02 13:07:41,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 99 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:41,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-05-02 13:07:41,631 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2021-05-02 13:07:41,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:41,631 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-05-02 13:07:41,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:41,631 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-05-02 13:07:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 13:07:41,632 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:41,632 INFO L523 BasicCegarLoop]: trace histogram [40, 37, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:41,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 13:07:41,832 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:41,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:41,833 INFO L82 PathProgramCache]: Analyzing trace with hash 536576302, now seen corresponding path program 36 times [2021-05-02 13:07:41,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:41,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190238355] [2021-05-02 13:07:41,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:42,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1666 backedges. 190 proven. 1406 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 13:07:42,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:42,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190238355] [2021-05-02 13:07:42,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190238355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:42,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040234308] [2021-05-02 13:07:42,530 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 13:07:42,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 13:07:42,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:42,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:07:42,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:42,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:42,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:43,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:43,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:43,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1666 backedges. 194 proven. 66 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2021-05-02 13:07:43,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040234308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:43,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:43,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 14] total 53 [2021-05-02 13:07:43,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870846055] [2021-05-02 13:07:43,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 13:07:43,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:43,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 13:07:43,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=1884, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 13:07:43,049 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:45,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:45,599 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2021-05-02 13:07:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 13:07:45,601 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2021-05-02 13:07:45,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:45,602 INFO L225 Difference]: With dead ends: 143 [2021-05-02 13:07:45,602 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 13:07:45,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 2996.3ms TimeCoverageRelationStatistics Valid=3066, Invalid=7440, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 13:07:45,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 13:07:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 107. [2021-05-02 13:07:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 102 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2021-05-02 13:07:45,613 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 103 [2021-05-02 13:07:45,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:45,613 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2021-05-02 13:07:45,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 52 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2021-05-02 13:07:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 13:07:45,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:45,614 INFO L523 BasicCegarLoop]: trace histogram [41, 38, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:45,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-02 13:07:45,837 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:45,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:45,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1739333512, now seen corresponding path program 37 times [2021-05-02 13:07:45,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:45,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239538412] [2021-05-02 13:07:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:46,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 13:07:46,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:46,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239538412] [2021-05-02 13:07:46,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239538412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:46,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088101907] [2021-05-02 13:07:46,580 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 13:07:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:46,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 13:07:46,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:46,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 13:07:46,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088101907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:46,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:46,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-05-02 13:07:46,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404918014] [2021-05-02 13:07:46,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 13:07:46,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:46,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 13:07:46,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 13:07:46,863 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:48,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:48,407 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2021-05-02 13:07:48,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 13:07:48,407 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-05-02 13:07:48,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:48,408 INFO L225 Difference]: With dead ends: 134 [2021-05-02 13:07:48,408 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 13:07:48,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 2029.0ms TimeCoverageRelationStatistics Valid=2502, Invalid=4140, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 13:07:48,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 13:07:48,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-02 13:07:48,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0480769230769231) internal successors, (109), 104 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:48,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2021-05-02 13:07:48,416 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 106 [2021-05-02 13:07:48,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:48,416 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2021-05-02 13:07:48,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:48,416 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2021-05-02 13:07:48,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 13:07:48,419 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:48,419 INFO L523 BasicCegarLoop]: trace histogram [42, 39, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:48,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:07:48,634 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:48,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:48,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1564949445, now seen corresponding path program 38 times [2021-05-02 13:07:48,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:48,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968152982] [2021-05-02 13:07:48,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:49,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 13:07:49,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:49,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968152982] [2021-05-02 13:07:49,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968152982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:49,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745940024] [2021-05-02 13:07:49,364 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 13:07:49,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:07:49,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:49,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 13:07:49,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:49,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 13:07:49,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745940024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:49,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:49,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2021-05-02 13:07:49,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700584286] [2021-05-02 13:07:49,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 13:07:49,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:49,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 13:07:49,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 13:07:49,652 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:51,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:51,291 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2021-05-02 13:07:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 13:07:51,291 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2021-05-02 13:07:51,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:51,292 INFO L225 Difference]: With dead ends: 136 [2021-05-02 13:07:51,292 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 13:07:51,293 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 2071.6ms TimeCoverageRelationStatistics Valid=2626, Invalid=4346, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 13:07:51,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 13:07:51,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-02 13:07:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0471698113207548) internal successors, (111), 106 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:51,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2021-05-02 13:07:51,304 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 108 [2021-05-02 13:07:51,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:51,304 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2021-05-02 13:07:51,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2021-05-02 13:07:51,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 13:07:51,305 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:51,305 INFO L523 BasicCegarLoop]: trace histogram [43, 40, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:51,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:07:51,521 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:51,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:51,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1485585602, now seen corresponding path program 39 times [2021-05-02 13:07:51,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:51,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544051229] [2021-05-02 13:07:51,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:52,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1927 backedges. 205 proven. 1640 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 13:07:52,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:52,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544051229] [2021-05-02 13:07:52,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544051229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:52,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144930749] [2021-05-02 13:07:52,309 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 13:07:52,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 13:07:52,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:52,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 13:07:52,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:52,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1927 backedges. 209 proven. 78 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-05-02 13:07:52,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144930749] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:52,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:52,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 15] total 57 [2021-05-02 13:07:52,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545937899] [2021-05-02 13:07:52,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 13:07:52,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:52,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 13:07:52,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1009, Invalid=2183, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 13:07:52,866 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 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 13:07:55,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:55,746 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2021-05-02 13:07:55,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 13:07:55,747 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 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 110 [2021-05-02 13:07:55,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:55,747 INFO L225 Difference]: With dead ends: 151 [2021-05-02 13:07:55,748 INFO L226 Difference]: Without dead ends: 126 [2021-05-02 13:07:55,749 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 3408.0ms TimeCoverageRelationStatistics Valid=3595, Invalid=8615, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 13:07:55,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-02 13:07:55,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 114. [2021-05-02 13:07:55,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:55,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2021-05-02 13:07:55,759 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 110 [2021-05-02 13:07:55,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:55,759 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2021-05-02 13:07:55,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 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 13:07:55,760 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2021-05-02 13:07:55,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 13:07:55,760 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:55,760 INFO L523 BasicCegarLoop]: trace histogram [44, 41, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:55,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:07:55,961 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:55,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:55,961 INFO L82 PathProgramCache]: Analyzing trace with hash -971708926, now seen corresponding path program 40 times [2021-05-02 13:07:55,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:55,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490066055] [2021-05-02 13:07:55,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:56,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-02 13:07:56,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:56,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490066055] [2021-05-02 13:07:56,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490066055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:56,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849272712] [2021-05-02 13:07:56,822 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 13:07:56,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:07:56,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:56,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 13:07:56,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:56,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:56,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-02 13:07:57,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849272712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:57,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:57,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-02 13:07:57,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581669334] [2021-05-02 13:07:57,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 13:07:57,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:57,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 13:07:57,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 13:07:57,087 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:58,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:58,870 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2021-05-02 13:07:58,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 13:07:58,870 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2021-05-02 13:07:58,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:58,871 INFO L225 Difference]: With dead ends: 142 [2021-05-02 13:07:58,871 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 13:07:58,872 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 2327.8ms TimeCoverageRelationStatistics Valid=2883, Invalid=4773, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 13:07:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 13:07:58,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-05-02 13:07:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.045045045045045) internal successors, (116), 111 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2021-05-02 13:07:58,883 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2021-05-02 13:07:58,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:58,883 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2021-05-02 13:07:58,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.152173913043478) internal successors, (99), 45 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:58,884 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2021-05-02 13:07:58,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-02 13:07:58,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:58,884 INFO L523 BasicCegarLoop]: trace histogram [45, 42, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:59,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-02 13:07:59,101 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:59,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:59,101 INFO L82 PathProgramCache]: Analyzing trace with hash -830484257, now seen corresponding path program 41 times [2021-05-02 13:07:59,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:59,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462538007] [2021-05-02 13:07:59,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:59,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-02 13:07:59,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:59,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462538007] [2021-05-02 13:07:59,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462538007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:59,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808394193] [2021-05-02 13:07:59,990 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 13:08:00,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-05-02 13:08:00,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:00,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 13:08:00,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:00,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-02 13:08:00,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808394193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:00,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:00,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2021-05-02 13:08:00,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385124099] [2021-05-02 13:08:00,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 13:08:00,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:00,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 13:08:00,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 13:08:00,268 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:02,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:02,097 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2021-05-02 13:08:02,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 13:08:02,097 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2021-05-02 13:08:02,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:02,098 INFO L225 Difference]: With dead ends: 144 [2021-05-02 13:08:02,098 INFO L226 Difference]: Without dead ends: 118 [2021-05-02 13:08:02,099 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 2400.1ms TimeCoverageRelationStatistics Valid=3016, Invalid=4994, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 13:08:02,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-02 13:08:02,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-05-02 13:08:02,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 113 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2021-05-02 13:08:02,110 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 115 [2021-05-02 13:08:02,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:02,110 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2021-05-02 13:08:02,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:02,110 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2021-05-02 13:08:02,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 13:08:02,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:02,111 INFO L523 BasicCegarLoop]: trace histogram [46, 43, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:02,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:02,311 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:02,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:02,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1742436476, now seen corresponding path program 42 times [2021-05-02 13:08:02,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:02,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021593846] [2021-05-02 13:08:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:03,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2207 backedges. 220 proven. 1892 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-02 13:08:03,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:03,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021593846] [2021-05-02 13:08:03,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021593846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:03,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580220273] [2021-05-02 13:08:03,180 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 13:08:03,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-05-02 13:08:03,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:03,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:08:03,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:03,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2207 backedges. 224 proven. 91 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2021-05-02 13:08:03,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580220273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:03,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:03,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 16] total 61 [2021-05-02 13:08:03,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360445944] [2021-05-02 13:08:03,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 13:08:03,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:03,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 13:08:03,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1156, Invalid=2504, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 13:08:03,777 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:06,926 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2021-05-02 13:08:06,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 13:08:06,927 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2021-05-02 13:08:06,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:06,934 INFO L225 Difference]: With dead ends: 159 [2021-05-02 13:08:06,934 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 13:08:06,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 3809.2ms TimeCoverageRelationStatistics Valid=4166, Invalid=9876, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 13:08:06,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 13:08:06,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 121. [2021-05-02 13:08:06,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.043103448275862) internal successors, (121), 116 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:06,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2021-05-02 13:08:06,947 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 117 [2021-05-02 13:08:06,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:06,948 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2021-05-02 13:08:06,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:06,948 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2021-05-02 13:08:06,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-02 13:08:06,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:06,949 INFO L523 BasicCegarLoop]: trace histogram [47, 44, 14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:07,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:07,173 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:07,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:07,173 INFO L82 PathProgramCache]: Analyzing trace with hash 111686058, now seen corresponding path program 43 times [2021-05-02 13:08:07,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:07,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962278684] [2021-05-02 13:08:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:08,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-05-02 13:08:08,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:08,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962278684] [2021-05-02 13:08:08,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962278684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:08,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273518870] [2021-05-02 13:08:08,216 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 13:08:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:08,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 13:08:08,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:08,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-05-02 13:08:08,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273518870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:08,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:08,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-02 13:08:08,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274433752] [2021-05-02 13:08:08,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 13:08:08,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:08,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 13:08:08,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 13:08:08,524 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:10,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:10,659 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2021-05-02 13:08:10,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 13:08:10,659 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2021-05-02 13:08:10,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:10,660 INFO L225 Difference]: With dead ends: 150 [2021-05-02 13:08:10,660 INFO L226 Difference]: Without dead ends: 123 [2021-05-02 13:08:10,661 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 2793.9ms TimeCoverageRelationStatistics Valid=3291, Invalid=5451, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 13:08:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-02 13:08:10,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-05-02 13:08:10,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 118 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:10,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2021-05-02 13:08:10,671 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 120 [2021-05-02 13:08:10,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:10,671 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2021-05-02 13:08:10,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:10,671 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2021-05-02 13:08:10,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 13:08:10,672 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:10,672 INFO L523 BasicCegarLoop]: trace histogram [48, 45, 14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:10,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 13:08:10,878 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:10,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:10,878 INFO L82 PathProgramCache]: Analyzing trace with hash 325436461, now seen corresponding path program 44 times [2021-05-02 13:08:10,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:10,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556052286] [2021-05-02 13:08:10,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:11,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2409 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-05-02 13:08:11,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:11,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556052286] [2021-05-02 13:08:11,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556052286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:11,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226099443] [2021-05-02 13:08:11,886 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 13:08:11,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:08:11,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:11,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 13:08:11,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:11,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2409 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-05-02 13:08:12,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226099443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:12,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:12,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2021-05-02 13:08:12,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569268777] [2021-05-02 13:08:12,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 13:08:12,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:12,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 13:08:12,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 13:08:12,202 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:14,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:14,272 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2021-05-02 13:08:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 13:08:14,278 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2021-05-02 13:08:14,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:14,279 INFO L225 Difference]: With dead ends: 152 [2021-05-02 13:08:14,279 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 13:08:14,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 2728.8ms TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 13:08:14,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 13:08:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-05-02 13:08:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0416666666666667) internal successors, (125), 120 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:14,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2021-05-02 13:08:14,293 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 122 [2021-05-02 13:08:14,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:14,293 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2021-05-02 13:08:14,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 49 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:14,293 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2021-05-02 13:08:14,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 13:08:14,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:14,294 INFO L523 BasicCegarLoop]: trace histogram [49, 46, 14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:14,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 13:08:14,509 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:14,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:14,509 INFO L82 PathProgramCache]: Analyzing trace with hash -418856464, now seen corresponding path program 45 times [2021-05-02 13:08:14,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:14,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282222458] [2021-05-02 13:08:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:15,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2506 backedges. 235 proven. 2162 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-05-02 13:08:15,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:15,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282222458] [2021-05-02 13:08:15,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282222458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:15,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063224154] [2021-05-02 13:08:15,566 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 13:08:15,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-02 13:08:15,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:15,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 13:08:15,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:15,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:15,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:15,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:15,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:15,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:15,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:15,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:15,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2506 backedges. 322 proven. 9 refuted. 0 times theorem prover too weak. 2175 trivial. 0 not checked. [2021-05-02 13:08:15,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063224154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:15,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:15,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 6] total 54 [2021-05-02 13:08:15,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675007418] [2021-05-02 13:08:15,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 13:08:15,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:15,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 13:08:15,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 13:08:15,950 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:18,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:18,241 INFO L93 Difference]: Finished difference Result 157 states and 169 transitions. [2021-05-02 13:08:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 13:08:18,242 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2021-05-02 13:08:18,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:18,243 INFO L225 Difference]: With dead ends: 157 [2021-05-02 13:08:18,243 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 13:08:18,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 3216.3ms TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 13:08:18,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 13:08:18,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-05-02 13:08:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0483870967741935) internal successors, (130), 124 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 134 transitions. [2021-05-02 13:08:18,256 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 134 transitions. Word has length 124 [2021-05-02 13:08:18,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:18,256 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 134 transitions. [2021-05-02 13:08:18,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:18,257 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 134 transitions. [2021-05-02 13:08:18,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 13:08:18,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:18,257 INFO L523 BasicCegarLoop]: trace histogram [51, 47, 14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:18,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-02 13:08:18,458 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:18,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:18,458 INFO L82 PathProgramCache]: Analyzing trace with hash -81928008, now seen corresponding path program 46 times [2021-05-02 13:08:18,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:18,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926983886] [2021-05-02 13:08:18,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:19,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 336 proven. 2256 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-05-02 13:08:19,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:19,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926983886] [2021-05-02 13:08:19,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926983886] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:19,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469160760] [2021-05-02 13:08:19,474 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 13:08:19,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:08:19,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:19,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 13:08:19,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:19,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 336 proven. 2256 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-05-02 13:08:19,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469160760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:19,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:19,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-02 13:08:19,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037752896] [2021-05-02 13:08:19,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 13:08:19,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:19,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 13:08:19,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 13:08:19,800 INFO L87 Difference]: Start difference. First operand 129 states and 134 transitions. Second operand has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:22,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:22,016 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2021-05-02 13:08:22,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 13:08:22,016 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2021-05-02 13:08:22,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:22,017 INFO L225 Difference]: With dead ends: 160 [2021-05-02 13:08:22,017 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 13:08:22,018 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 2871.3ms TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 13:08:22,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 13:08:22,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-02 13:08:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0476190476190477) internal successors, (132), 126 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 13:08:22,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2021-05-02 13:08:22,032 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 128 [2021-05-02 13:08:22,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:22,033 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2021-05-02 13:08:22,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 51 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:22,033 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2021-05-02 13:08:22,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 13:08:22,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:22,034 INFO L523 BasicCegarLoop]: trace histogram [52, 48, 14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:22,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:22,249 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:22,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:22,249 INFO L82 PathProgramCache]: Analyzing trace with hash -517062597, now seen corresponding path program 47 times [2021-05-02 13:08:22,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:22,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626231104] [2021-05-02 13:08:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:23,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 343 proven. 2352 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-05-02 13:08:23,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:23,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626231104] [2021-05-02 13:08:23,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626231104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:23,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938965481] [2021-05-02 13:08:23,347 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 13:08:23,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 53 check-sat command(s) [2021-05-02 13:08:23,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:23,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 13:08:23,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:23,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 343 proven. 2352 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-05-02 13:08:23,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938965481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:23,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:23,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2021-05-02 13:08:23,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747226292] [2021-05-02 13:08:23,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 13:08:23,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:23,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 13:08:23,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 13:08:23,687 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:26,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:26,057 INFO L93 Difference]: Finished difference Result 162 states and 173 transitions. [2021-05-02 13:08:26,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 13:08:26,057 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-05-02 13:08:26,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:26,058 INFO L225 Difference]: With dead ends: 162 [2021-05-02 13:08:26,058 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 13:08:26,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 3077.7ms TimeCoverageRelationStatistics Valid=3877, Invalid=6425, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 13:08:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 13:08:26,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-05-02 13:08:26,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.046875) internal successors, (134), 128 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:26,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 138 transitions. [2021-05-02 13:08:26,073 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 138 transitions. Word has length 130 [2021-05-02 13:08:26,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:26,073 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 138 transitions. [2021-05-02 13:08:26,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:26,073 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 138 transitions. [2021-05-02 13:08:26,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 13:08:26,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:26,074 INFO L523 BasicCegarLoop]: trace histogram [53, 49, 14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:26,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:26,293 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2069574914, now seen corresponding path program 48 times [2021-05-02 13:08:26,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:26,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976144899] [2021-05-02 13:08:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:27,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 350 proven. 2450 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-05-02 13:08:27,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:27,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976144899] [2021-05-02 13:08:27,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976144899] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:27,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027459222] [2021-05-02 13:08:27,443 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 13:08:27,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-05-02 13:08:27,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:27,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:08:27,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:27,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:27,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:28,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:28,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:28,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:28,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:28,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:28,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:28,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:28,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:28,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:28,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:28,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 359 proven. 105 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2021-05-02 13:08:28,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027459222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:28,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:28,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 17] total 68 [2021-05-02 13:08:28,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39571530] [2021-05-02 13:08:28,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 13:08:28,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:28,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 13:08:28,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1463, Invalid=3093, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 13:08:28,214 INFO L87 Difference]: Start difference. First operand 133 states and 138 transitions. Second operand has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 67 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:31,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:31,870 INFO L93 Difference]: Finished difference Result 185 states and 207 transitions. [2021-05-02 13:08:31,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 13:08:31,871 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 67 states have internal predecessors, (138), 2 states have call successors, (4), 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 132 [2021-05-02 13:08:31,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:31,871 INFO L225 Difference]: With dead ends: 185 [2021-05-02 13:08:31,871 INFO L226 Difference]: Without dead ends: 156 [2021-05-02 13:08:31,873 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3396 ImplicationChecksByTransitivity, 4712.4ms TimeCoverageRelationStatistics Valid=5083, Invalid=12473, Unknown=0, NotChecked=0, Total=17556 [2021-05-02 13:08:31,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-02 13:08:31,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 136. [2021-05-02 13:08:31,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0458015267175573) internal successors, (137), 131 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:31,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2021-05-02 13:08:31,887 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 132 [2021-05-02 13:08:31,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:31,888 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2021-05-02 13:08:31,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 67 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:31,888 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2021-05-02 13:08:31,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 13:08:31,889 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:31,889 INFO L523 BasicCegarLoop]: trace histogram [54, 50, 15, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:32,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-02 13:08:32,093 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:32,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:32,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1911599746, now seen corresponding path program 49 times [2021-05-02 13:08:32,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:32,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250120568] [2021-05-02 13:08:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:33,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 357 proven. 2550 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-05-02 13:08:33,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:33,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250120568] [2021-05-02 13:08:33,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250120568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:33,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181747391] [2021-05-02 13:08:33,248 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 13:08:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:33,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 13:08:33,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:33,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 357 proven. 2550 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-05-02 13:08:33,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181747391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:33,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:33,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2021-05-02 13:08:33,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591432432] [2021-05-02 13:08:33,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 13:08:33,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:33,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 13:08:33,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 13:08:33,550 INFO L87 Difference]: Start difference. First operand 136 states and 141 transitions. Second operand has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:36,021 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2021-05-02 13:08:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 13:08:36,021 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2021-05-02 13:08:36,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:36,022 INFO L225 Difference]: With dead ends: 168 [2021-05-02 13:08:36,022 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 13:08:36,023 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 3207.7ms TimeCoverageRelationStatistics Valid=4188, Invalid=6942, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 13:08:36,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 13:08:36,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-05-02 13:08:36,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0451127819548873) internal successors, (139), 133 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:36,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2021-05-02 13:08:36,033 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 135 [2021-05-02 13:08:36,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:36,033 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2021-05-02 13:08:36,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:36,034 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2021-05-02 13:08:36,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-05-02 13:08:36,034 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:36,034 INFO L523 BasicCegarLoop]: trace histogram [55, 51, 15, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:36,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:36,238 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:36,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:36,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1371629983, now seen corresponding path program 50 times [2021-05-02 13:08:36,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:36,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199752464] [2021-05-02 13:08:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:37,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3145 backedges. 364 proven. 2652 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-05-02 13:08:37,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:37,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199752464] [2021-05-02 13:08:37,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199752464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:37,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897614599] [2021-05-02 13:08:37,418 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 13:08:37,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:08:37,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:37,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 13:08:37,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:37,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3145 backedges. 364 proven. 2652 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-05-02 13:08:37,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897614599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:37,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:37,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2021-05-02 13:08:37,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722870744] [2021-05-02 13:08:37,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 13:08:37,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:37,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 13:08:37,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 13:08:37,792 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand has 56 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:40,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:40,369 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2021-05-02 13:08:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 13:08:40,369 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2021-05-02 13:08:40,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:40,370 INFO L225 Difference]: With dead ends: 170 [2021-05-02 13:08:40,370 INFO L226 Difference]: Without dead ends: 140 [2021-05-02 13:08:40,371 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 3393.1ms TimeCoverageRelationStatistics Valid=4348, Invalid=7208, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 13:08:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-02 13:08:40,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-05-02 13:08:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0444444444444445) internal successors, (141), 135 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:40,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 145 transitions. [2021-05-02 13:08:40,382 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 145 transitions. Word has length 137 [2021-05-02 13:08:40,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:40,382 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 145 transitions. [2021-05-02 13:08:40,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.125) internal successors, (119), 55 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:40,382 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 145 transitions. [2021-05-02 13:08:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-05-02 13:08:40,383 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:40,383 INFO L523 BasicCegarLoop]: trace histogram [56, 52, 15, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:40,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-02 13:08:40,597 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:40,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:40,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2143236740, now seen corresponding path program 51 times [2021-05-02 13:08:40,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:40,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063110750] [2021-05-02 13:08:40,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:41,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 371 proven. 2756 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-05-02 13:08:41,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:41,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063110750] [2021-05-02 13:08:41,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063110750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:41,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728460547] [2021-05-02 13:08:41,799 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 13:08:41,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-02 13:08:41,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:41,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 13:08:41,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:42,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 380 proven. 120 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2021-05-02 13:08:42,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728460547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:42,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:42,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 18] total 72 [2021-05-02 13:08:42,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555516974] [2021-05-02 13:08:42,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 13:08:42,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:42,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 13:08:42,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=3473, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 13:08:42,609 INFO L87 Difference]: Start difference. First operand 140 states and 145 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:46,543 INFO L93 Difference]: Finished difference Result 193 states and 215 transitions. [2021-05-02 13:08:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 13:08:46,543 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (4), 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 139 [2021-05-02 13:08:46,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:46,544 INFO L225 Difference]: With dead ends: 193 [2021-05-02 13:08:46,544 INFO L226 Difference]: Without dead ends: 163 [2021-05-02 13:08:46,545 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3812 ImplicationChecksByTransitivity, 5109.3ms TimeCoverageRelationStatistics Valid=5759, Invalid=13981, Unknown=0, NotChecked=0, Total=19740 [2021-05-02 13:08:46,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-02 13:08:46,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 143. [2021-05-02 13:08:46,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0434782608695652) internal successors, (144), 138 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 13:08:46,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 148 transitions. [2021-05-02 13:08:46,559 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 148 transitions. Word has length 139 [2021-05-02 13:08:46,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:46,559 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 148 transitions. [2021-05-02 13:08:46,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:46,559 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 148 transitions. [2021-05-02 13:08:46,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-02 13:08:46,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:46,560 INFO L523 BasicCegarLoop]: trace histogram [57, 53, 16, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:46,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-02 13:08:46,761 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:46,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:46,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2072160150, now seen corresponding path program 52 times [2021-05-02 13:08:46,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:46,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85945986] [2021-05-02 13:08:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:48,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3385 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 13:08:48,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:48,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85945986] [2021-05-02 13:08:48,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85945986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:48,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39631390] [2021-05-02 13:08:48,014 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 13:08:48,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:08:48,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:48,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 13:08:48,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:48,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3385 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 13:08:48,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39631390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:48,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:48,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 58 [2021-05-02 13:08:48,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889828927] [2021-05-02 13:08:48,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 13:08:48,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:48,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 13:08:48,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 13:08:48,349 INFO L87 Difference]: Start difference. First operand 143 states and 148 transitions. Second operand has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:50,973 INFO L93 Difference]: Finished difference Result 176 states and 187 transitions. [2021-05-02 13:08:50,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 13:08:50,974 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2021-05-02 13:08:50,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:50,974 INFO L225 Difference]: With dead ends: 176 [2021-05-02 13:08:50,974 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 13:08:50,975 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 3478.2ms TimeCoverageRelationStatistics Valid=4677, Invalid=7755, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 13:08:50,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 13:08:50,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 13:08:50,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.042857142857143) internal successors, (146), 140 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:50,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 150 transitions. [2021-05-02 13:08:50,987 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 150 transitions. Word has length 142 [2021-05-02 13:08:50,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:50,987 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 150 transitions. [2021-05-02 13:08:50,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 57 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:50,987 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 150 transitions. [2021-05-02 13:08:50,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 13:08:50,988 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:50,988 INFO L523 BasicCegarLoop]: trace histogram [58, 54, 16, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:51,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-02 13:08:51,205 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:51,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:51,205 INFO L82 PathProgramCache]: Analyzing trace with hash -163391827, now seen corresponding path program 53 times [2021-05-02 13:08:51,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:51,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675876528] [2021-05-02 13:08:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:52,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3500 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 13:08:52,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:52,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675876528] [2021-05-02 13:08:52,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675876528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:52,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863745665] [2021-05-02 13:08:52,479 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 13:08:52,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 59 check-sat command(s) [2021-05-02 13:08:52,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:52,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-02 13:08:52,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:52,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3500 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 13:08:52,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863745665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:52,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:52,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 59 [2021-05-02 13:08:52,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358313005] [2021-05-02 13:08:52,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 13:08:52,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:52,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 13:08:52,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 13:08:52,833 INFO L87 Difference]: Start difference. First operand 145 states and 150 transitions. Second operand has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:55,401 INFO L93 Difference]: Finished difference Result 178 states and 189 transitions. [2021-05-02 13:08:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 13:08:55,401 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2021-05-02 13:08:55,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:55,402 INFO L225 Difference]: With dead ends: 178 [2021-05-02 13:08:55,402 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 13:08:55,403 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 3573.4ms TimeCoverageRelationStatistics Valid=4846, Invalid=8036, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 13:08:55,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 13:08:55,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-05-02 13:08:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0422535211267605) internal successors, (148), 142 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 152 transitions. [2021-05-02 13:08:55,414 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 152 transitions. Word has length 144 [2021-05-02 13:08:55,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:55,414 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 152 transitions. [2021-05-02 13:08:55,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 152 transitions. [2021-05-02 13:08:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-02 13:08:55,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:55,415 INFO L523 BasicCegarLoop]: trace histogram [59, 55, 16, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:55,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-02 13:08:55,615 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:55,616 INFO L82 PathProgramCache]: Analyzing trace with hash 211931184, now seen corresponding path program 54 times [2021-05-02 13:08:55,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:55,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095728589] [2021-05-02 13:08:55,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:56,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3617 backedges. 392 proven. 3080 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 13:08:56,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:56,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095728589] [2021-05-02 13:08:56,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095728589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:56,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27412808] [2021-05-02 13:08:56,943 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 13:08:57,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-05-02 13:08:57,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:57,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:08:57,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:57,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3617 backedges. 401 proven. 136 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2021-05-02 13:08:57,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27412808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:57,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:57,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 19] total 76 [2021-05-02 13:08:57,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620237290] [2021-05-02 13:08:57,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 13:08:57,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:57,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 13:08:57,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1825, Invalid=3875, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 13:08:57,791 INFO L87 Difference]: Start difference. First operand 147 states and 152 transitions. Second operand has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:02,327 INFO L93 Difference]: Finished difference Result 201 states and 223 transitions. [2021-05-02 13:09:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 13:09:02,328 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (4), 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 146 [2021-05-02 13:09:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:02,329 INFO L225 Difference]: With dead ends: 201 [2021-05-02 13:09:02,329 INFO L226 Difference]: Without dead ends: 170 [2021-05-02 13:09:02,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4250 ImplicationChecksByTransitivity, 5665.2ms TimeCoverageRelationStatistics Valid=6477, Invalid=15575, Unknown=0, NotChecked=0, Total=22052 [2021-05-02 13:09:02,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-02 13:09:02,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 150. [2021-05-02 13:09:02,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.0413793103448277) internal successors, (151), 145 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:02,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2021-05-02 13:09:02,343 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 146 [2021-05-02 13:09:02,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:02,343 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2021-05-02 13:09:02,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:02,343 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2021-05-02 13:09:02,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-02 13:09:02,344 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:02,344 INFO L523 BasicCegarLoop]: trace histogram [60, 56, 17, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:02,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:09:02,546 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:02,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:02,547 INFO L82 PathProgramCache]: Analyzing trace with hash -536580912, now seen corresponding path program 55 times [2021-05-02 13:09:02,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:02,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148542661] [2021-05-02 13:09:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:03,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3753 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 13:09:03,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:03,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148542661] [2021-05-02 13:09:03,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148542661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:03,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136272641] [2021-05-02 13:09:03,932 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 13:09:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:03,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 13:09:04,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:04,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3753 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 13:09:04,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136272641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:04,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:04,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59] total 61 [2021-05-02 13:09:04,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654952116] [2021-05-02 13:09:04,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 13:09:04,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:04,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 13:09:04,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 13:09:04,270 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:07,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:07,121 INFO L93 Difference]: Finished difference Result 184 states and 195 transitions. [2021-05-02 13:09:07,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 13:09:07,122 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2021-05-02 13:09:07,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:07,123 INFO L225 Difference]: With dead ends: 184 [2021-05-02 13:09:07,123 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 13:09:07,124 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 3830.9ms TimeCoverageRelationStatistics Valid=5193, Invalid=8613, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 13:09:07,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 13:09:07,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-05-02 13:09:07,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0408163265306123) internal successors, (153), 147 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:07,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 157 transitions. [2021-05-02 13:09:07,136 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 157 transitions. Word has length 149 [2021-05-02 13:09:07,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:07,136 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 157 transitions. [2021-05-02 13:09:07,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:07,136 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 157 transitions. [2021-05-02 13:09:07,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-02 13:09:07,136 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:07,137 INFO L523 BasicCegarLoop]: trace histogram [61, 57, 17, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:07,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-02 13:09:07,337 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:07,338 INFO L82 PathProgramCache]: Analyzing trace with hash -626791123, now seen corresponding path program 56 times [2021-05-02 13:09:07,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:07,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216280163] [2021-05-02 13:09:07,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:08,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3874 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 13:09:08,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:08,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216280163] [2021-05-02 13:09:08,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216280163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:08,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640573196] [2021-05-02 13:09:08,768 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 13:09:08,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:09:08,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:08,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 13:09:08,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:08,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:08,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3874 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 13:09:09,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640573196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:09,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:09,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 62 [2021-05-02 13:09:09,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072610697] [2021-05-02 13:09:09,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 13:09:09,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:09,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 13:09:09,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 13:09:09,105 INFO L87 Difference]: Start difference. First operand 152 states and 157 transitions. Second operand has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 61 states have internal predecessors, (131), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:11,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:11,917 INFO L93 Difference]: Finished difference Result 186 states and 197 transitions. [2021-05-02 13:09:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 13:09:11,917 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 61 states have internal predecessors, (131), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2021-05-02 13:09:11,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:11,918 INFO L225 Difference]: With dead ends: 186 [2021-05-02 13:09:11,918 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 13:09:11,919 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1878 ImplicationChecksByTransitivity, 3944.5ms TimeCoverageRelationStatistics Valid=5371, Invalid=8909, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 13:09:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 13:09:11,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-05-02 13:09:11,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0402684563758389) internal successors, (155), 149 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 159 transitions. [2021-05-02 13:09:11,932 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 159 transitions. Word has length 151 [2021-05-02 13:09:11,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:11,933 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 159 transitions. [2021-05-02 13:09:11,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 61 states have internal predecessors, (131), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 159 transitions. [2021-05-02 13:09:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-02 13:09:11,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:11,933 INFO L523 BasicCegarLoop]: trace histogram [62, 58, 17, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:12,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:09:12,134 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:12,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:12,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1419457974, now seen corresponding path program 57 times [2021-05-02 13:09:12,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:12,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759646551] [2021-05-02 13:09:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:13,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3997 backedges. 413 proven. 3422 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 13:09:13,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:13,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759646551] [2021-05-02 13:09:13,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759646551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:13,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265159628] [2021-05-02 13:09:13,645 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 13:09:13,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 13:09:13,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:13,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 13:09:13,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:13,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:13,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:13,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:13,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:13,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:13,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3997 backedges. 522 proven. 16 refuted. 0 times theorem prover too weak. 3459 trivial. 0 not checked. [2021-05-02 13:09:14,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265159628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:14,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:14,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 7] total 67 [2021-05-02 13:09:14,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719081542] [2021-05-02 13:09:14,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 13:09:14,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:14,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 13:09:14,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 13:09:14,147 INFO L87 Difference]: Start difference. First operand 154 states and 159 transitions. Second operand has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 66 states have internal predecessors, (143), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:17,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:17,551 INFO L93 Difference]: Finished difference Result 191 states and 205 transitions. [2021-05-02 13:09:17,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 13:09:17,552 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 66 states have internal predecessors, (143), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2021-05-02 13:09:17,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:17,553 INFO L225 Difference]: With dead ends: 191 [2021-05-02 13:09:17,553 INFO L226 Difference]: Without dead ends: 159 [2021-05-02 13:09:17,555 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 4721.9ms TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 13:09:17,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-02 13:09:17,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2021-05-02 13:09:17,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0457516339869282) internal successors, (160), 153 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:17,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 164 transitions. [2021-05-02 13:09:17,574 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 164 transitions. Word has length 153 [2021-05-02 13:09:17,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:17,574 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 164 transitions. [2021-05-02 13:09:17,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 66 states have internal predecessors, (143), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:17,574 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 164 transitions. [2021-05-02 13:09:17,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-02 13:09:17,575 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:17,575 INFO L523 BasicCegarLoop]: trace histogram [64, 59, 17, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:17,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-05-02 13:09:17,781 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:17,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:17,781 INFO L82 PathProgramCache]: Analyzing trace with hash -60401022, now seen corresponding path program 58 times [2021-05-02 13:09:17,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:17,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843624175] [2021-05-02 13:09:17,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:19,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 540 proven. 3540 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-02 13:09:19,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:19,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843624175] [2021-05-02 13:09:19,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843624175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:19,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282032428] [2021-05-02 13:09:19,315 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 13:09:19,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:09:19,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:19,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-02 13:09:19,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:19,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 540 proven. 3540 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-02 13:09:19,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282032428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:19,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:19,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 64 [2021-05-02 13:09:19,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878977905] [2021-05-02 13:09:19,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 13:09:19,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:19,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 13:09:19,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 13:09:19,693 INFO L87 Difference]: Start difference. First operand 158 states and 164 transitions. Second operand has 64 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:22,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:22,839 INFO L93 Difference]: Finished difference Result 194 states and 207 transitions. [2021-05-02 13:09:22,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 13:09:22,840 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2021-05-02 13:09:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:22,841 INFO L225 Difference]: With dead ends: 194 [2021-05-02 13:09:22,841 INFO L226 Difference]: Without dead ends: 160 [2021-05-02 13:09:22,842 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 4245.0ms TimeCoverageRelationStatistics Valid=5736, Invalid=9516, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 13:09:22,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-02 13:09:22,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-05-02 13:09:22,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0451612903225806) internal successors, (162), 155 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:22,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2021-05-02 13:09:22,861 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 157 [2021-05-02 13:09:22,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:22,861 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2021-05-02 13:09:22,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 63 states have internal predecessors, (135), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:22,862 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2021-05-02 13:09:22,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-05-02 13:09:22,862 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:22,863 INFO L523 BasicCegarLoop]: trace histogram [65, 60, 17, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:23,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:09:23,086 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:23,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:23,086 INFO L82 PathProgramCache]: Analyzing trace with hash -60674593, now seen corresponding path program 59 times [2021-05-02 13:09:23,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:23,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897502759] [2021-05-02 13:09:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:24,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 549 proven. 3660 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-02 13:09:24,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:24,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897502759] [2021-05-02 13:09:24,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897502759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:24,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486188778] [2021-05-02 13:09:24,702 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 13:09:24,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-05-02 13:09:24,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:24,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 13:09:24,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:24,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:24,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 549 proven. 3660 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-02 13:09:25,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486188778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:25,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:25,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63] total 65 [2021-05-02 13:09:25,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496023803] [2021-05-02 13:09:25,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 13:09:25,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:25,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 13:09:25,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 13:09:25,073 INFO L87 Difference]: Start difference. First operand 160 states and 166 transitions. Second operand has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:28,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:28,264 INFO L93 Difference]: Finished difference Result 196 states and 209 transitions. [2021-05-02 13:09:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 13:09:28,264 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2021-05-02 13:09:28,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:28,265 INFO L225 Difference]: With dead ends: 196 [2021-05-02 13:09:28,266 INFO L226 Difference]: Without dead ends: 162 [2021-05-02 13:09:28,267 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 4354.0ms TimeCoverageRelationStatistics Valid=5923, Invalid=9827, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 13:09:28,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-02 13:09:28,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-05-02 13:09:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0445859872611465) internal successors, (164), 157 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:28,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 168 transitions. [2021-05-02 13:09:28,287 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 168 transitions. Word has length 159 [2021-05-02 13:09:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:28,287 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 168 transitions. [2021-05-02 13:09:28,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 64 states have internal predecessors, (137), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:28,287 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 168 transitions. [2021-05-02 13:09:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-05-02 13:09:28,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:28,288 INFO L523 BasicCegarLoop]: trace histogram [66, 61, 17, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:28,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-02 13:09:28,513 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:28,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:28,513 INFO L82 PathProgramCache]: Analyzing trace with hash -323576324, now seen corresponding path program 60 times [2021-05-02 13:09:28,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:28,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668806460] [2021-05-02 13:09:28,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:30,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4509 backedges. 558 proven. 3782 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-02 13:09:30,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:30,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668806460] [2021-05-02 13:09:30,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668806460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:30,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981535200] [2021-05-02 13:09:30,171 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 13:09:30,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 13:09:30,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:30,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 13:09:30,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:30,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:30,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:31,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:31,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:31,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:31,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:31,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:31,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:31,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4509 backedges. 574 proven. 153 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2021-05-02 13:09:31,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981535200] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:31,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:31,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 20] total 83 [2021-05-02 13:09:31,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874613236] [2021-05-02 13:09:31,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 13:09:31,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:31,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 13:09:31,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2207, Invalid=4599, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 13:09:31,157 INFO L87 Difference]: Start difference. First operand 162 states and 168 transitions. Second operand has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:36,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:36,194 INFO L93 Difference]: Finished difference Result 229 states and 258 transitions. [2021-05-02 13:09:36,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 13:09:36,194 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2021-05-02 13:09:36,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:36,195 INFO L225 Difference]: With dead ends: 229 [2021-05-02 13:09:36,195 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 13:09:36,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5165 ImplicationChecksByTransitivity, 6744.6ms TimeCoverageRelationStatistics Valid=7607, Invalid=18799, Unknown=0, NotChecked=0, Total=26406 [2021-05-02 13:09:36,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 13:09:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 165. [2021-05-02 13:09:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.04375) internal successors, (167), 160 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:36,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 171 transitions. [2021-05-02 13:09:36,218 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 171 transitions. Word has length 161 [2021-05-02 13:09:36,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:36,218 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 171 transitions. [2021-05-02 13:09:36,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:36,218 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 171 transitions. [2021-05-02 13:09:36,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-02 13:09:36,219 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:36,219 INFO L523 BasicCegarLoop]: trace histogram [67, 62, 18, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:36,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:09:36,433 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:36,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:36,433 INFO L82 PathProgramCache]: Analyzing trace with hash 509485994, now seen corresponding path program 61 times [2021-05-02 13:09:36,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:36,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331291310] [2021-05-02 13:09:36,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:38,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 13:09:38,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:38,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331291310] [2021-05-02 13:09:38,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331291310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:38,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55001749] [2021-05-02 13:09:38,222 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 13:09:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:38,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-02 13:09:38,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:38,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 13:09:38,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55001749] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:38,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:38,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65] total 67 [2021-05-02 13:09:38,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054706355] [2021-05-02 13:09:38,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 13:09:38,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:38,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 13:09:38,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 13:09:38,679 INFO L87 Difference]: Start difference. First operand 165 states and 171 transitions. Second operand has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:42,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:42,125 INFO L93 Difference]: Finished difference Result 202 states and 215 transitions. [2021-05-02 13:09:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 13:09:42,125 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2021-05-02 13:09:42,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:42,126 INFO L225 Difference]: With dead ends: 202 [2021-05-02 13:09:42,126 INFO L226 Difference]: Without dead ends: 167 [2021-05-02 13:09:42,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 4852.3ms TimeCoverageRelationStatistics Valid=6306, Invalid=10464, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 13:09:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-02 13:09:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-05-02 13:09:42,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0432098765432098) internal successors, (169), 162 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 173 transitions. [2021-05-02 13:09:42,141 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 173 transitions. Word has length 164 [2021-05-02 13:09:42,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:42,141 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 173 transitions. [2021-05-02 13:09:42,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:42,142 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 173 transitions. [2021-05-02 13:09:42,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-02 13:09:42,142 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:42,143 INFO L523 BasicCegarLoop]: trace histogram [68, 63, 18, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:42,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-02 13:09:42,357 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:42,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:42,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1832108627, now seen corresponding path program 62 times [2021-05-02 13:09:42,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:42,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489257676] [2021-05-02 13:09:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:44,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4795 backedges. 576 proven. 4032 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 13:09:44,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:44,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489257676] [2021-05-02 13:09:44,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489257676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:44,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071753523] [2021-05-02 13:09:44,155 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 13:09:44,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:09:44,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:44,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-02 13:09:44,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:44,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4795 backedges. 576 proven. 4032 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 13:09:44,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071753523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:44,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:44,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66] total 68 [2021-05-02 13:09:44,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296187288] [2021-05-02 13:09:44,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 13:09:44,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:44,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 13:09:44,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 13:09:44,603 INFO L87 Difference]: Start difference. First operand 167 states and 173 transitions. Second operand has 68 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 67 states have internal predecessors, (143), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:48,199 INFO L93 Difference]: Finished difference Result 204 states and 217 transitions. [2021-05-02 13:09:48,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 13:09:48,200 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 67 states have internal predecessors, (143), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2021-05-02 13:09:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:48,200 INFO L225 Difference]: With dead ends: 204 [2021-05-02 13:09:48,200 INFO L226 Difference]: Without dead ends: 169 [2021-05-02 13:09:48,202 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2265 ImplicationChecksByTransitivity, 4902.5ms TimeCoverageRelationStatistics Valid=6502, Invalid=10790, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 13:09:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-02 13:09:48,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-05-02 13:09:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0426829268292683) internal successors, (171), 164 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 13:09:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 175 transitions. [2021-05-02 13:09:48,215 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 175 transitions. Word has length 166 [2021-05-02 13:09:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:48,216 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 175 transitions. [2021-05-02 13:09:48,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 67 states have internal predecessors, (143), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:48,216 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 175 transitions. [2021-05-02 13:09:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-05-02 13:09:48,216 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:48,216 INFO L523 BasicCegarLoop]: trace histogram [69, 64, 18, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:48,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:09:48,418 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:48,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:48,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1541676304, now seen corresponding path program 63 times [2021-05-02 13:09:48,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:48,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446156569] [2021-05-02 13:09:48,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:50,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 585 proven. 4160 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 13:09:50,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:50,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446156569] [2021-05-02 13:09:50,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446156569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:50,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935781866] [2021-05-02 13:09:50,262 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 13:09:50,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 13:09:50,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:50,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:09:50,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:50,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:50,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 601 proven. 171 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2021-05-02 13:09:51,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935781866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:51,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:51,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 21] total 87 [2021-05-02 13:09:51,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375265089] [2021-05-02 13:09:51,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-02 13:09:51,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:51,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-02 13:09:51,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2422, Invalid=5060, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 13:09:51,312 INFO L87 Difference]: Start difference. First operand 169 states and 175 transitions. Second operand has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:57,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:09:57,008 INFO L93 Difference]: Finished difference Result 237 states and 266 transitions. [2021-05-02 13:09:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 13:09:57,009 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (4), 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 168 [2021-05-02 13:09:57,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:09:57,010 INFO L225 Difference]: With dead ends: 237 [2021-05-02 13:09:57,010 INFO L226 Difference]: Without dead ends: 202 [2021-05-02 13:09:57,012 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5676 ImplicationChecksByTransitivity, 7450.9ms TimeCoverageRelationStatistics Valid=8430, Invalid=20640, Unknown=0, NotChecked=0, Total=29070 [2021-05-02 13:09:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-02 13:09:57,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 172. [2021-05-02 13:09:57,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0419161676646707) internal successors, (174), 167 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:57,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 178 transitions. [2021-05-02 13:09:57,028 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 178 transitions. Word has length 168 [2021-05-02 13:09:57,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:09:57,028 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 178 transitions. [2021-05-02 13:09:57,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:09:57,029 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 178 transitions. [2021-05-02 13:09:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-05-02 13:09:57,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:09:57,030 INFO L523 BasicCegarLoop]: trace histogram [70, 65, 19, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:09:57,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-02 13:09:57,248 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:09:57,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:09:57,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1693412944, now seen corresponding path program 64 times [2021-05-02 13:09:57,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:09:57,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40634003] [2021-05-02 13:09:57,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:09:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:59,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:09:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:09:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5090 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-02 13:09:59,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:09:59,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40634003] [2021-05-02 13:09:59,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40634003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:59,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195482431] [2021-05-02 13:09:59,157 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 13:09:59,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:09:59,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:09:59,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 13:09:59,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:59,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:09:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5090 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-02 13:09:59,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195482431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:59,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:59,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68] total 70 [2021-05-02 13:09:59,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225861492] [2021-05-02 13:09:59,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 13:09:59,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:59,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 13:09:59,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 13:09:59,599 INFO L87 Difference]: Start difference. First operand 172 states and 178 transitions. Second operand has 70 states, 70 states have (on average 2.1) internal successors, (147), 69 states have internal predecessors, (147), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:03,443 INFO L93 Difference]: Finished difference Result 210 states and 223 transitions. [2021-05-02 13:10:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 13:10:03,444 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1) internal successors, (147), 69 states have internal predecessors, (147), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2021-05-02 13:10:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:03,445 INFO L225 Difference]: With dead ends: 210 [2021-05-02 13:10:03,445 INFO L226 Difference]: Without dead ends: 174 [2021-05-02 13:10:03,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 5212.6ms TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 13:10:03,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-02 13:10:03,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-05-02 13:10:03,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.0414201183431953) internal successors, (176), 169 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:03,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 180 transitions. [2021-05-02 13:10:03,469 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 180 transitions. Word has length 171 [2021-05-02 13:10:03,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:03,469 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 180 transitions. [2021-05-02 13:10:03,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.1) internal successors, (147), 69 states have internal predecessors, (147), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:03,470 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 180 transitions. [2021-05-02 13:10:03,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-05-02 13:10:03,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:03,471 INFO L523 BasicCegarLoop]: trace histogram [71, 66, 19, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:03,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-02 13:10:03,685 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:03,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:03,685 INFO L82 PathProgramCache]: Analyzing trace with hash -822895891, now seen corresponding path program 65 times [2021-05-02 13:10:03,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:03,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16904680] [2021-05-02 13:10:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:05,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5231 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-02 13:10:05,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:05,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16904680] [2021-05-02 13:10:05,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16904680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:05,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127663658] [2021-05-02 13:10:05,718 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 13:10:05,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2021-05-02 13:10:05,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:10:05,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 13:10:05,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:05,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:05,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5231 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-02 13:10:06,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127663658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:06,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:06,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69] total 71 [2021-05-02 13:10:06,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398324455] [2021-05-02 13:10:06,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 13:10:06,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:06,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 13:10:06,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 13:10:06,238 INFO L87 Difference]: Start difference. First operand 174 states and 180 transitions. Second operand has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 70 states have internal predecessors, (149), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:10,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:10,243 INFO L93 Difference]: Finished difference Result 212 states and 225 transitions. [2021-05-02 13:10:10,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 13:10:10,244 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 70 states have internal predecessors, (149), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2021-05-02 13:10:10,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:10,245 INFO L225 Difference]: With dead ends: 212 [2021-05-02 13:10:10,245 INFO L226 Difference]: Without dead ends: 176 [2021-05-02 13:10:10,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2472 ImplicationChecksByTransitivity, 5517.0ms TimeCoverageRelationStatistics Valid=7108, Invalid=11798, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 13:10:10,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-02 13:10:10,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-05-02 13:10:10,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.04093567251462) internal successors, (178), 171 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:10,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 182 transitions. [2021-05-02 13:10:10,270 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 182 transitions. Word has length 173 [2021-05-02 13:10:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:10,270 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 182 transitions. [2021-05-02 13:10:10,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 70 states have internal predecessors, (149), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 182 transitions. [2021-05-02 13:10:10,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-02 13:10:10,271 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:10,271 INFO L523 BasicCegarLoop]: trace histogram [72, 67, 19, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:10,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-02 13:10:10,477 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:10,478 INFO L82 PathProgramCache]: Analyzing trace with hash -929098678, now seen corresponding path program 66 times [2021-05-02 13:10:10,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:10,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421797751] [2021-05-02 13:10:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:12,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5374 backedges. 612 proven. 4556 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-02 13:10:12,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:12,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421797751] [2021-05-02 13:10:12,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421797751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:12,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924330081] [2021-05-02 13:10:12,545 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 13:10:12,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-05-02 13:10:12,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:10:12,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 13:10:12,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:12,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:12,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:12,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:12,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:12,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:12,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5374 backedges. 628 proven. 190 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2021-05-02 13:10:13,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924330081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:13,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:13,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 22] total 91 [2021-05-02 13:10:13,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246476084] [2021-05-02 13:10:13,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 13:10:13,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:13,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 13:10:13,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2647, Invalid=5543, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 13:10:13,723 INFO L87 Difference]: Start difference. First operand 176 states and 182 transitions. Second operand has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 90 states have internal predecessors, (181), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:20,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:20,326 INFO L93 Difference]: Finished difference Result 245 states and 274 transitions. [2021-05-02 13:10:20,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 13:10:20,327 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 90 states have internal predecessors, (181), 2 states have call successors, (4), 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 175 [2021-05-02 13:10:20,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:20,328 INFO L225 Difference]: With dead ends: 245 [2021-05-02 13:10:20,328 INFO L226 Difference]: Without dead ends: 209 [2021-05-02 13:10:20,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6209 ImplicationChecksByTransitivity, 8331.6ms TimeCoverageRelationStatistics Valid=9295, Invalid=22567, Unknown=0, NotChecked=0, Total=31862 [2021-05-02 13:10:20,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-02 13:10:20,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 179. [2021-05-02 13:10:20,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0402298850574712) internal successors, (181), 174 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 13:10:20,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 185 transitions. [2021-05-02 13:10:20,355 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 185 transitions. Word has length 175 [2021-05-02 13:10:20,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:20,355 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 185 transitions. [2021-05-02 13:10:20,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 90 states have internal predecessors, (181), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:20,356 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 185 transitions. [2021-05-02 13:10:20,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-02 13:10:20,357 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:20,357 INFO L523 BasicCegarLoop]: trace histogram [73, 68, 20, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:20,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:20,573 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:20,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:20,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1493047844, now seen corresponding path program 67 times [2021-05-02 13:10:20,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:20,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964280358] [2021-05-02 13:10:20,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:22,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:22,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5539 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-05-02 13:10:22,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:22,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964280358] [2021-05-02 13:10:22,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964280358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:22,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139673952] [2021-05-02 13:10:22,711 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 13:10:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:22,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 13:10:22,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:22,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:22,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5539 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-05-02 13:10:23,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139673952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:23,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:23,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71] total 73 [2021-05-02 13:10:23,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58306413] [2021-05-02 13:10:23,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 13:10:23,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:23,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 13:10:23,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 13:10:23,185 INFO L87 Difference]: Start difference. First operand 179 states and 185 transitions. Second operand has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 72 states have internal predecessors, (153), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:27,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:27,553 INFO L93 Difference]: Finished difference Result 218 states and 231 transitions. [2021-05-02 13:10:27,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 13:10:27,553 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 72 states have internal predecessors, (153), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2021-05-02 13:10:27,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:27,554 INFO L225 Difference]: With dead ends: 218 [2021-05-02 13:10:27,554 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 13:10:27,556 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 5915.1ms TimeCoverageRelationStatistics Valid=7527, Invalid=12495, Unknown=0, NotChecked=0, Total=20022 [2021-05-02 13:10:27,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 13:10:27,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-05-02 13:10:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0397727272727273) internal successors, (183), 176 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 13:10:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 187 transitions. [2021-05-02 13:10:27,574 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 187 transitions. Word has length 178 [2021-05-02 13:10:27,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:27,574 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 187 transitions. [2021-05-02 13:10:27,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.095890410958904) internal successors, (153), 72 states have internal predecessors, (153), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:27,575 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 187 transitions. [2021-05-02 13:10:27,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-02 13:10:27,575 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:27,576 INFO L523 BasicCegarLoop]: trace histogram [74, 69, 20, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:27,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:27,789 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:27,789 INFO L82 PathProgramCache]: Analyzing trace with hash 424459935, now seen corresponding path program 68 times [2021-05-02 13:10:27,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:27,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321883158] [2021-05-02 13:10:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:30,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5686 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-05-02 13:10:30,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:30,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321883158] [2021-05-02 13:10:30,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321883158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:30,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129749455] [2021-05-02 13:10:30,029 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 13:10:30,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:10:30,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:10:30,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-02 13:10:30,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:30,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5686 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-05-02 13:10:30,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129749455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:30,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:30,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72] total 74 [2021-05-02 13:10:30,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349653094] [2021-05-02 13:10:30,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 13:10:30,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:30,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 13:10:30,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 13:10:30,479 INFO L87 Difference]: Start difference. First operand 181 states and 187 transitions. Second operand has 74 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 73 states have internal predecessors, (155), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:34,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:34,777 INFO L93 Difference]: Finished difference Result 220 states and 233 transitions. [2021-05-02 13:10:34,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 13:10:34,777 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 73 states have internal predecessors, (155), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2021-05-02 13:10:34,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:34,778 INFO L225 Difference]: With dead ends: 220 [2021-05-02 13:10:34,778 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 13:10:34,779 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2688 ImplicationChecksByTransitivity, 5973.8ms TimeCoverageRelationStatistics Valid=7741, Invalid=12851, Unknown=0, NotChecked=0, Total=20592 [2021-05-02 13:10:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 13:10:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-05-02 13:10:34,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0393258426966292) internal successors, (185), 178 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:34,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 189 transitions. [2021-05-02 13:10:34,795 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 189 transitions. Word has length 180 [2021-05-02 13:10:34,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:34,796 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 189 transitions. [2021-05-02 13:10:34,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 73 states have internal predecessors, (155), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:34,796 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 189 transitions. [2021-05-02 13:10:34,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-05-02 13:10:34,797 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:34,797 INFO L523 BasicCegarLoop]: trace histogram [75, 70, 20, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:35,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:35,001 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:35,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:35,002 INFO L82 PathProgramCache]: Analyzing trace with hash 608465570, now seen corresponding path program 69 times [2021-05-02 13:10:35,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:35,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738855105] [2021-05-02 13:10:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:37,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5835 backedges. 639 proven. 4970 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-05-02 13:10:37,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:37,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738855105] [2021-05-02 13:10:37,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738855105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:37,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286371101] [2021-05-02 13:10:37,268 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 13:10:37,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-05-02 13:10:37,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:10:37,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 13:10:37,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:37,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5835 backedges. 655 proven. 210 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2021-05-02 13:10:38,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286371101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:38,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:38,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 23] total 95 [2021-05-02 13:10:38,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912132368] [2021-05-02 13:10:38,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 13:10:38,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:38,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 13:10:38,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2882, Invalid=6048, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 13:10:38,528 INFO L87 Difference]: Start difference. First operand 183 states and 189 transitions. Second operand has 95 states, 95 states have (on average 1.9789473684210526) internal successors, (188), 94 states have internal predecessors, (188), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:45,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:45,451 INFO L93 Difference]: Finished difference Result 253 states and 282 transitions. [2021-05-02 13:10:45,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-02 13:10:45,451 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9789473684210526) internal successors, (188), 94 states have internal predecessors, (188), 2 states have call successors, (4), 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 182 [2021-05-02 13:10:45,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:45,452 INFO L225 Difference]: With dead ends: 253 [2021-05-02 13:10:45,453 INFO L226 Difference]: Without dead ends: 216 [2021-05-02 13:10:45,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6764 ImplicationChecksByTransitivity, 9184.6ms TimeCoverageRelationStatistics Valid=10202, Invalid=24580, Unknown=0, NotChecked=0, Total=34782 [2021-05-02 13:10:45,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-02 13:10:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 186. [2021-05-02 13:10:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.0386740331491713) internal successors, (188), 181 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 192 transitions. [2021-05-02 13:10:45,482 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 192 transitions. Word has length 182 [2021-05-02 13:10:45,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:45,482 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 192 transitions. [2021-05-02 13:10:45,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 1.9789473684210526) internal successors, (188), 94 states have internal predecessors, (188), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:45,482 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 192 transitions. [2021-05-02 13:10:45,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-02 13:10:45,483 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:45,484 INFO L523 BasicCegarLoop]: trace histogram [76, 71, 21, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:45,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-05-02 13:10:45,689 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:45,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:45,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1243263458, now seen corresponding path program 70 times [2021-05-02 13:10:45,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:45,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932735214] [2021-05-02 13:10:45,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:48,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6007 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-05-02 13:10:48,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:48,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932735214] [2021-05-02 13:10:48,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932735214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:48,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662566036] [2021-05-02 13:10:48,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:48,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:10:48,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:10:48,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-02 13:10:48,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:48,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6007 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-05-02 13:10:48,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662566036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:48,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:48,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74] total 76 [2021-05-02 13:10:48,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363956573] [2021-05-02 13:10:48,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 13:10:48,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:48,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 13:10:48,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 13:10:48,512 INFO L87 Difference]: Start difference. First operand 186 states and 192 transitions. Second operand has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 75 states have internal predecessors, (159), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:53,019 INFO L93 Difference]: Finished difference Result 226 states and 239 transitions. [2021-05-02 13:10:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 13:10:53,020 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 75 states have internal predecessors, (159), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2021-05-02 13:10:53,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:53,021 INFO L225 Difference]: With dead ends: 226 [2021-05-02 13:10:53,021 INFO L226 Difference]: Without dead ends: 188 [2021-05-02 13:10:53,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2837 ImplicationChecksByTransitivity, 6286.4ms TimeCoverageRelationStatistics Valid=8178, Invalid=13578, Unknown=0, NotChecked=0, Total=21756 [2021-05-02 13:10:53,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-02 13:10:53,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2021-05-02 13:10:53,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.0382513661202186) internal successors, (190), 183 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 194 transitions. [2021-05-02 13:10:53,050 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 194 transitions. Word has length 185 [2021-05-02 13:10:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:53,050 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 194 transitions. [2021-05-02 13:10:53,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 75 states have internal predecessors, (159), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 194 transitions. [2021-05-02 13:10:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-05-02 13:10:53,051 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:53,051 INFO L523 BasicCegarLoop]: trace histogram [77, 72, 21, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:53,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:53,257 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:53,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:53,257 INFO L82 PathProgramCache]: Analyzing trace with hash 448570363, now seen corresponding path program 71 times [2021-05-02 13:10:53,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:53,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438424929] [2021-05-02 13:10:53,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:55,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-05-02 13:10:55,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:55,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438424929] [2021-05-02 13:10:55,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438424929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:55,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681605067] [2021-05-02 13:10:55,710 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 13:10:55,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2021-05-02 13:10:55,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:10:55,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-02 13:10:55,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:55,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:55,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-05-02 13:10:56,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681605067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:56,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:56,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75] total 77 [2021-05-02 13:10:56,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559835064] [2021-05-02 13:10:56,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 13:10:56,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:56,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 13:10:56,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 13:10:56,248 INFO L87 Difference]: Start difference. First operand 188 states and 194 transitions. Second operand has 77 states, 77 states have (on average 2.090909090909091) internal successors, (161), 76 states have internal predecessors, (161), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:00,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:00,849 INFO L93 Difference]: Finished difference Result 228 states and 241 transitions. [2021-05-02 13:11:00,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 13:11:00,850 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.090909090909091) internal successors, (161), 76 states have internal predecessors, (161), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2021-05-02 13:11:00,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:00,851 INFO L225 Difference]: With dead ends: 228 [2021-05-02 13:11:00,851 INFO L226 Difference]: Without dead ends: 190 [2021-05-02 13:11:00,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2913 ImplicationChecksByTransitivity, 6558.6ms TimeCoverageRelationStatistics Valid=8401, Invalid=13949, Unknown=0, NotChecked=0, Total=22350 [2021-05-02 13:11:00,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-02 13:11:00,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2021-05-02 13:11:00,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.037837837837838) internal successors, (192), 185 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:00,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 196 transitions. [2021-05-02 13:11:00,881 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 196 transitions. Word has length 187 [2021-05-02 13:11:00,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:00,882 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 196 transitions. [2021-05-02 13:11:00,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 2.090909090909091) internal successors, (161), 76 states have internal predecessors, (161), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:00,882 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 196 transitions. [2021-05-02 13:11:00,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-05-02 13:11:00,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:00,883 INFO L523 BasicCegarLoop]: trace histogram [78, 73, 21, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:01,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:01,109 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:01,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:01,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1491732840, now seen corresponding path program 72 times [2021-05-02 13:11:01,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:01,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205264300] [2021-05-02 13:11:01,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:03,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6315 backedges. 666 proven. 5402 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-05-02 13:11:03,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:03,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205264300] [2021-05-02 13:11:03,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205264300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:03,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781800526] [2021-05-02 13:11:03,626 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 13:11:03,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-05-02 13:11:03,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:03,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 13:11:03,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:03,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6315 backedges. 803 proven. 25 refuted. 0 times theorem prover too weak. 5487 trivial. 0 not checked. [2021-05-02 13:11:04,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781800526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:04,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:04,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 8] total 83 [2021-05-02 13:11:04,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823925690] [2021-05-02 13:11:04,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 13:11:04,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:04,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 13:11:04,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 13:11:04,391 INFO L87 Difference]: Start difference. First operand 190 states and 196 transitions. Second operand has 83 states, 83 states have (on average 2.108433734939759) internal successors, (175), 82 states have internal predecessors, (175), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:09,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:09,730 INFO L93 Difference]: Finished difference Result 233 states and 249 transitions. [2021-05-02 13:11:09,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 13:11:09,731 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.108433734939759) internal successors, (175), 82 states have internal predecessors, (175), 2 states have call successors, (4), 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 13:11:09,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:09,732 INFO L225 Difference]: With dead ends: 233 [2021-05-02 13:11:09,732 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 13:11:09,733 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3233 ImplicationChecksByTransitivity, 7738.1ms TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2021-05-02 13:11:09,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 13:11:09,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2021-05-02 13:11:09,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0423280423280423) internal successors, (197), 189 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 201 transitions. [2021-05-02 13:11:09,763 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 201 transitions. Word has length 189 [2021-05-02 13:11:09,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:09,763 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 201 transitions. [2021-05-02 13:11:09,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 2.108433734939759) internal successors, (175), 82 states have internal predecessors, (175), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:09,763 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 201 transitions. [2021-05-02 13:11:09,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-05-02 13:11:09,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:09,764 INFO L523 BasicCegarLoop]: trace histogram [80, 74, 21, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:09,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:09,975 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:09,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:09,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1995502768, now seen corresponding path program 73 times [2021-05-02 13:11:09,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:09,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457502855] [2021-05-02 13:11:09,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:12,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 825 proven. 5550 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-05-02 13:11:12,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:12,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457502855] [2021-05-02 13:11:12,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457502855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:12,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680144135] [2021-05-02 13:11:12,530 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 13:11:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:12,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-02 13:11:12,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:12,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:13,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:13,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:13,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:13,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:13,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:13,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:13,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:13,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 825 proven. 5550 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-05-02 13:11:13,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680144135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:13,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:13,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77] total 79 [2021-05-02 13:11:13,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696330526] [2021-05-02 13:11:13,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 13:11:13,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:13,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 13:11:13,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 13:11:13,075 INFO L87 Difference]: Start difference. First operand 194 states and 201 transitions. Second operand has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 78 states have internal predecessors, (165), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:17,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:17,809 INFO L93 Difference]: Finished difference Result 236 states and 251 transitions. [2021-05-02 13:11:17,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 13:11:17,810 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 78 states have internal predecessors, (165), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2021-05-02 13:11:17,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:17,811 INFO L225 Difference]: With dead ends: 236 [2021-05-02 13:11:17,811 INFO L226 Difference]: Without dead ends: 196 [2021-05-02 13:11:17,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3068 ImplicationChecksByTransitivity, 6829.5ms TimeCoverageRelationStatistics Valid=8856, Invalid=14706, Unknown=0, NotChecked=0, Total=23562 [2021-05-02 13:11:17,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-02 13:11:17,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-05-02 13:11:17,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0418848167539267) internal successors, (199), 191 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:17,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 203 transitions. [2021-05-02 13:11:17,831 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 203 transitions. Word has length 193 [2021-05-02 13:11:17,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:17,832 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 203 transitions. [2021-05-02 13:11:17,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 78 states have internal predecessors, (165), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:17,832 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 203 transitions. [2021-05-02 13:11:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-02 13:11:17,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:17,833 INFO L523 BasicCegarLoop]: trace histogram [81, 75, 21, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:18,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-02 13:11:18,043 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:18,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:18,044 INFO L82 PathProgramCache]: Analyzing trace with hash -556452819, now seen corresponding path program 74 times [2021-05-02 13:11:18,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:18,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755193549] [2021-05-02 13:11:18,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:20,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 836 proven. 5700 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-05-02 13:11:20,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:20,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755193549] [2021-05-02 13:11:20,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755193549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:20,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230879643] [2021-05-02 13:11:20,921 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 13:11:21,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:11:21,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:21,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 77 conjunts are in the unsatisfiable core [2021-05-02 13:11:21,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:21,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 836 proven. 5700 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-05-02 13:11:21,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230879643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:21,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:21,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78] total 80 [2021-05-02 13:11:21,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329162959] [2021-05-02 13:11:21,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 13:11:21,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:21,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 13:11:21,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 13:11:21,419 INFO L87 Difference]: Start difference. First operand 196 states and 203 transitions. Second operand has 80 states, 80 states have (on average 2.0875) internal successors, (167), 79 states have internal predecessors, (167), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:26,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:26,568 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2021-05-02 13:11:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 13:11:26,569 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0875) internal successors, (167), 79 states have internal predecessors, (167), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2021-05-02 13:11:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:26,570 INFO L225 Difference]: With dead ends: 238 [2021-05-02 13:11:26,570 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 13:11:26,572 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3147 ImplicationChecksByTransitivity, 7476.5ms TimeCoverageRelationStatistics Valid=9088, Invalid=15092, Unknown=0, NotChecked=0, Total=24180 [2021-05-02 13:11:26,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 13:11:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-05-02 13:11:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0414507772020725) internal successors, (201), 193 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 205 transitions. [2021-05-02 13:11:26,591 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 205 transitions. Word has length 195 [2021-05-02 13:11:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:26,591 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 205 transitions. [2021-05-02 13:11:26,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 2.0875) internal successors, (167), 79 states have internal predecessors, (167), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:26,591 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 205 transitions. [2021-05-02 13:11:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-05-02 13:11:26,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:26,592 INFO L523 BasicCegarLoop]: trace histogram [82, 76, 21, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:26,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:26,793 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:26,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:26,793 INFO L82 PathProgramCache]: Analyzing trace with hash -608921142, now seen corresponding path program 75 times [2021-05-02 13:11:26,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:26,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439797] [2021-05-02 13:11:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:29,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6955 backedges. 847 proven. 5852 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-05-02 13:11:29,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:29,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439797] [2021-05-02 13:11:29,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:29,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315071046] [2021-05-02 13:11:29,616 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 13:11:29,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-02 13:11:29,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:29,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 13:11:29,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:30,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:30,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:31,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:31,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:31,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6955 backedges. 872 proven. 231 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2021-05-02 13:11:31,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315071046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:31,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:31,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 24] total 102 [2021-05-02 13:11:31,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750062543] [2021-05-02 13:11:31,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-02 13:11:31,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:31,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-02 13:11:31,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3358, Invalid=6944, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 13:11:31,078 INFO L87 Difference]: Start difference. First operand 198 states and 205 transitions. Second operand has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 101 states have internal predecessors, (203), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:39,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:39,977 INFO L93 Difference]: Finished difference Result 283 states and 320 transitions. [2021-05-02 13:11:39,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 13:11:39,978 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 101 states have internal predecessors, (203), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2021-05-02 13:11:39,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:39,979 INFO L225 Difference]: With dead ends: 283 [2021-05-02 13:11:39,979 INFO L226 Difference]: Without dead ends: 243 [2021-05-02 13:11:39,981 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7909 ImplicationChecksByTransitivity, 11169.6ms TimeCoverageRelationStatistics Valid=11608, Invalid=28592, Unknown=0, NotChecked=0, Total=40200 [2021-05-02 13:11:39,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-02 13:11:40,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 201. [2021-05-02 13:11:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0408163265306123) internal successors, (204), 196 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 208 transitions. [2021-05-02 13:11:40,001 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 208 transitions. Word has length 197 [2021-05-02 13:11:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:40,002 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 208 transitions. [2021-05-02 13:11:40,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 101 states have internal predecessors, (203), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 208 transitions. [2021-05-02 13:11:40,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-02 13:11:40,003 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:40,003 INFO L523 BasicCegarLoop]: trace histogram [83, 77, 22, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:40,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-02 13:11:40,204 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:40,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:40,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1376863204, now seen corresponding path program 76 times [2021-05-02 13:11:40,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:40,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478522226] [2021-05-02 13:11:40,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:43,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7142 backedges. 858 proven. 6006 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-05-02 13:11:43,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:43,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478522226] [2021-05-02 13:11:43,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478522226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:43,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128859548] [2021-05-02 13:11:43,195 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 13:11:43,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:11:43,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:43,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 79 conjunts are in the unsatisfiable core [2021-05-02 13:11:43,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:43,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7142 backedges. 858 proven. 6006 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-05-02 13:11:43,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128859548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:43,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:43,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80] total 82 [2021-05-02 13:11:43,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208577766] [2021-05-02 13:11:43,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 13:11:43,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:43,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 13:11:43,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 13:11:43,771 INFO L87 Difference]: Start difference. First operand 201 states and 208 transitions. Second operand has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 81 states have internal predecessors, (171), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:49,084 INFO L93 Difference]: Finished difference Result 244 states and 259 transitions. [2021-05-02 13:11:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 13:11:49,085 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 81 states have internal predecessors, (171), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2021-05-02 13:11:49,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:49,087 INFO L225 Difference]: With dead ends: 244 [2021-05-02 13:11:49,087 INFO L226 Difference]: Without dead ends: 203 [2021-05-02 13:11:49,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3308 ImplicationChecksByTransitivity, 7862.7ms TimeCoverageRelationStatistics Valid=9561, Invalid=15879, Unknown=0, NotChecked=0, Total=25440 [2021-05-02 13:11:49,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-02 13:11:49,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2021-05-02 13:11:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.0404040404040404) internal successors, (206), 198 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:49,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 210 transitions. [2021-05-02 13:11:49,112 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 210 transitions. Word has length 200 [2021-05-02 13:11:49,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:49,112 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 210 transitions. [2021-05-02 13:11:49,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 81 states have internal predecessors, (171), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:49,113 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 210 transitions. [2021-05-02 13:11:49,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-02 13:11:49,114 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:49,114 INFO L523 BasicCegarLoop]: trace histogram [84, 78, 22, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:49,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:49,340 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:49,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:49,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1238323359, now seen corresponding path program 77 times [2021-05-02 13:11:49,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:49,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229329019] [2021-05-02 13:11:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:52,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7309 backedges. 869 proven. 6162 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-05-02 13:11:52,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229329019] [2021-05-02 13:11:52,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229329019] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868134122] [2021-05-02 13:11:52,455 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 13:11:52,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2021-05-02 13:11:52,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:52,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 13:11:52,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:52,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7309 backedges. 869 proven. 6162 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-05-02 13:11:53,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868134122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:53,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:53,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81] total 83 [2021-05-02 13:11:53,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370457473] [2021-05-02 13:11:53,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 13:11:53,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:53,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 13:11:53,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 13:11:53,080 INFO L87 Difference]: Start difference. First operand 203 states and 210 transitions. Second operand has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 82 states have internal predecessors, (173), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:58,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:58,896 INFO L93 Difference]: Finished difference Result 246 states and 261 transitions. [2021-05-02 13:11:58,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 13:11:58,896 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 82 states have internal predecessors, (173), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2021-05-02 13:11:58,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:58,897 INFO L225 Difference]: With dead ends: 246 [2021-05-02 13:11:58,897 INFO L226 Difference]: Without dead ends: 205 [2021-05-02 13:11:58,899 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3390 ImplicationChecksByTransitivity, 8240.8ms TimeCoverageRelationStatistics Valid=9802, Invalid=16280, Unknown=0, NotChecked=0, Total=26082 [2021-05-02 13:11:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-02 13:11:58,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2021-05-02 13:11:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.04) internal successors, (208), 200 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:58,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 212 transitions. [2021-05-02 13:11:58,929 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 212 transitions. Word has length 202 [2021-05-02 13:11:58,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:58,929 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 212 transitions. [2021-05-02 13:11:58,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 82 states have internal predecessors, (173), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:58,930 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 212 transitions. [2021-05-02 13:11:58,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-05-02 13:11:58,931 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:58,931 INFO L523 BasicCegarLoop]: trace histogram [85, 79, 22, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:59,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:59,157 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:59,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:59,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1876742242, now seen corresponding path program 78 times [2021-05-02 13:11:59,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:59,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094316295] [2021-05-02 13:11:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:02,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7478 backedges. 880 proven. 6320 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-05-02 13:12:02,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:02,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094316295] [2021-05-02 13:12:02,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094316295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:02,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400126392] [2021-05-02 13:12:02,330 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 13:12:02,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-05-02 13:12:02,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:02,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:12:02,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:02,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:02,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7478 backedges. 905 proven. 253 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2021-05-02 13:12:03,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400126392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:03,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:03,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 25] total 106 [2021-05-02 13:12:03,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962011335] [2021-05-02 13:12:03,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-02 13:12:03,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:03,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-02 13:12:03,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3622, Invalid=7508, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 13:12:03,995 INFO L87 Difference]: Start difference. First operand 205 states and 212 transitions. Second operand has 106 states, 106 states have (on average 1.9811320754716981) internal successors, (210), 105 states have internal predecessors, (210), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:14,427 INFO L93 Difference]: Finished difference Result 291 states and 328 transitions. [2021-05-02 13:12:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-02 13:12:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.9811320754716981) internal successors, (210), 105 states have internal predecessors, (210), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 204 [2021-05-02 13:12:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:14,429 INFO L225 Difference]: With dead ends: 291 [2021-05-02 13:12:14,429 INFO L226 Difference]: Without dead ends: 250 [2021-05-02 13:12:14,431 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8537 ImplicationChecksByTransitivity, 12977.1ms TimeCoverageRelationStatistics Valid=12620, Invalid=30852, Unknown=0, NotChecked=0, Total=43472 [2021-05-02 13:12:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-02 13:12:14,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 208. [2021-05-02 13:12:14,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 203 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:14,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 215 transitions. [2021-05-02 13:12:14,465 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 215 transitions. Word has length 204 [2021-05-02 13:12:14,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:14,465 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 215 transitions. [2021-05-02 13:12:14,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 1.9811320754716981) internal successors, (210), 105 states have internal predecessors, (210), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:14,466 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 215 transitions. [2021-05-02 13:12:14,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-05-02 13:12:14,467 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:14,467 INFO L523 BasicCegarLoop]: trace histogram [86, 80, 23, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:14,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:14,692 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:14,692 INFO L82 PathProgramCache]: Analyzing trace with hash -893238114, now seen corresponding path program 79 times [2021-05-02 13:12:14,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:14,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653771916] [2021-05-02 13:12:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:18,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7672 backedges. 891 proven. 6480 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-02 13:12:18,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:18,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653771916] [2021-05-02 13:12:18,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653771916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:18,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025528111] [2021-05-02 13:12:18,370 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 13:12:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:18,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 82 conjunts are in the unsatisfiable core [2021-05-02 13:12:18,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:18,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:18,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7672 backedges. 891 proven. 6480 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-02 13:12:19,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025528111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:19,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:19,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83] total 85 [2021-05-02 13:12:19,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19588062] [2021-05-02 13:12:19,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 13:12:19,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:19,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 13:12:19,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 13:12:19,072 INFO L87 Difference]: Start difference. First operand 208 states and 215 transitions. Second operand has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 84 states have internal predecessors, (177), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:25,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:25,334 INFO L93 Difference]: Finished difference Result 252 states and 267 transitions. [2021-05-02 13:12:25,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 13:12:25,335 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 84 states have internal predecessors, (177), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2021-05-02 13:12:25,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:25,336 INFO L225 Difference]: With dead ends: 252 [2021-05-02 13:12:25,336 INFO L226 Difference]: Without dead ends: 210 [2021-05-02 13:12:25,338 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3557 ImplicationChecksByTransitivity, 9469.2ms TimeCoverageRelationStatistics Valid=10293, Invalid=17097, Unknown=0, NotChecked=0, Total=27390 [2021-05-02 13:12:25,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-02 13:12:25,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2021-05-02 13:12:25,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.0390243902439025) internal successors, (213), 205 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:25,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 217 transitions. [2021-05-02 13:12:25,360 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 217 transitions. Word has length 207 [2021-05-02 13:12:25,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:25,360 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 217 transitions. [2021-05-02 13:12:25,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 84 states have internal predecessors, (177), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:25,360 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 217 transitions. [2021-05-02 13:12:25,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-05-02 13:12:25,361 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:25,361 INFO L523 BasicCegarLoop]: trace histogram [87, 81, 23, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:25,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:25,562 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:25,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:25,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1762469563, now seen corresponding path program 80 times [2021-05-02 13:12:25,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:25,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364413955] [2021-05-02 13:12:25,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:29,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7845 backedges. 902 proven. 6642 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-02 13:12:29,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:29,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364413955] [2021-05-02 13:12:29,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364413955] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:29,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754543139] [2021-05-02 13:12:29,244 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 13:12:29,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:12:29,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:29,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 83 conjunts are in the unsatisfiable core [2021-05-02 13:12:29,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:29,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7845 backedges. 902 proven. 6642 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-02 13:12:29,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754543139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:29,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:29,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84] total 86 [2021-05-02 13:12:29,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621504828] [2021-05-02 13:12:29,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 13:12:29,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:29,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 13:12:29,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 13:12:29,948 INFO L87 Difference]: Start difference. First operand 210 states and 217 transitions. Second operand has 86 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 85 states have internal predecessors, (179), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:36,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:36,830 INFO L93 Difference]: Finished difference Result 254 states and 269 transitions. [2021-05-02 13:12:36,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 13:12:36,831 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 85 states have internal predecessors, (179), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2021-05-02 13:12:36,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:36,832 INFO L225 Difference]: With dead ends: 254 [2021-05-02 13:12:36,832 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 13:12:36,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3642 ImplicationChecksByTransitivity, 9914.5ms TimeCoverageRelationStatistics Valid=10543, Invalid=17513, Unknown=0, NotChecked=0, Total=28056 [2021-05-02 13:12:36,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 13:12:36,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-05-02 13:12:36,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.038647342995169) internal successors, (215), 207 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 13:12:36,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 219 transitions. [2021-05-02 13:12:36,856 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 219 transitions. Word has length 209 [2021-05-02 13:12:36,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:36,857 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 219 transitions. [2021-05-02 13:12:36,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 85 states have internal predecessors, (179), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:36,857 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 219 transitions. [2021-05-02 13:12:36,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-05-02 13:12:36,858 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:36,858 INFO L523 BasicCegarLoop]: trace histogram [88, 82, 23, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:37,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:37,059 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:37,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:37,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1607993960, now seen corresponding path program 81 times [2021-05-02 13:12:37,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:37,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977345052] [2021-05-02 13:12:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:41,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8020 backedges. 913 proven. 6806 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-02 13:12:41,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:41,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977345052] [2021-05-02 13:12:41,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977345052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:41,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720529131] [2021-05-02 13:12:41,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:12:41,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-05-02 13:12:41,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:41,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 13:12:41,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:41,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:42,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:43,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:43,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:43,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:43,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:43,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8020 backedges. 938 proven. 276 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2021-05-02 13:12:43,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720529131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:43,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:43,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 26] total 110 [2021-05-02 13:12:43,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327166161] [2021-05-02 13:12:43,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-02 13:12:43,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:43,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-02 13:12:43,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3896, Invalid=8094, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 13:12:43,198 INFO L87 Difference]: Start difference. First operand 212 states and 219 transitions. Second operand has 110 states, 110 states have (on average 1.9727272727272727) internal successors, (217), 109 states have internal predecessors, (217), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:54,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:54,070 INFO L93 Difference]: Finished difference Result 299 states and 336 transitions. [2021-05-02 13:12:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-02 13:12:54,071 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.9727272727272727) internal successors, (217), 109 states have internal predecessors, (217), 2 states have call successors, (4), 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 211 [2021-05-02 13:12:54,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:54,073 INFO L225 Difference]: With dead ends: 299 [2021-05-02 13:12:54,073 INFO L226 Difference]: Without dead ends: 257 [2021-05-02 13:12:54,076 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9187 ImplicationChecksByTransitivity, 15627.0ms TimeCoverageRelationStatistics Valid=13674, Invalid=33198, Unknown=0, NotChecked=0, Total=46872 [2021-05-02 13:12:54,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-02 13:12:54,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 215. [2021-05-02 13:12:54,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0380952380952382) internal successors, (218), 210 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:54,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 222 transitions. [2021-05-02 13:12:54,102 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 222 transitions. Word has length 211 [2021-05-02 13:12:54,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:54,102 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 222 transitions. [2021-05-02 13:12:54,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 1.9727272727272727) internal successors, (217), 109 states have internal predecessors, (217), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:54,102 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 222 transitions. [2021-05-02 13:12:54,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-05-02 13:12:54,103 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:54,103 INFO L523 BasicCegarLoop]: trace histogram [89, 83, 24, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:54,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:54,309 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:54,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:54,310 INFO L82 PathProgramCache]: Analyzing trace with hash -6035250, now seen corresponding path program 82 times [2021-05-02 13:12:54,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:54,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474721323] [2021-05-02 13:12:54,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:58,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8221 backedges. 924 proven. 6972 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 13:12:58,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:58,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474721323] [2021-05-02 13:12:58,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474721323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:58,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917336223] [2021-05-02 13:12:58,659 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 13:12:58,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:12:58,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:58,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-02 13:12:58,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:58,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:58,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8221 backedges. 924 proven. 6972 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 13:12:59,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917336223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:59,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:59,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86] total 88 [2021-05-02 13:12:59,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182825689] [2021-05-02 13:12:59,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 13:12:59,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:59,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 13:12:59,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 13:12:59,500 INFO L87 Difference]: Start difference. First operand 215 states and 222 transitions. Second operand has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 87 states have internal predecessors, (183), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:07,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:07,129 INFO L93 Difference]: Finished difference Result 260 states and 275 transitions. [2021-05-02 13:13:07,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 13:13:07,130 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 87 states have internal predecessors, (183), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2021-05-02 13:13:07,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:07,131 INFO L225 Difference]: With dead ends: 260 [2021-05-02 13:13:07,131 INFO L226 Difference]: Without dead ends: 217 [2021-05-02 13:13:07,132 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 11415.4ms TimeCoverageRelationStatistics Valid=11052, Invalid=18360, Unknown=0, NotChecked=0, Total=29412 [2021-05-02 13:13:07,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-02 13:13:07,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-05-02 13:13:07,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0377358490566038) internal successors, (220), 212 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:07,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 224 transitions. [2021-05-02 13:13:07,170 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 224 transitions. Word has length 214 [2021-05-02 13:13:07,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:07,170 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 224 transitions. [2021-05-02 13:13:07,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 2.0795454545454546) internal successors, (183), 87 states have internal predecessors, (183), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:07,171 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 224 transitions. [2021-05-02 13:13:07,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-05-02 13:13:07,172 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:07,172 INFO L523 BasicCegarLoop]: trace histogram [90, 84, 24, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:07,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:07,393 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:07,393 INFO L82 PathProgramCache]: Analyzing trace with hash 674814993, now seen corresponding path program 83 times [2021-05-02 13:13:07,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:07,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081524318] [2021-05-02 13:13:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:12,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 935 proven. 7140 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 13:13:12,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:12,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081524318] [2021-05-02 13:13:12,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081524318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:12,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440389518] [2021-05-02 13:13:12,348 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 13:13:12,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2021-05-02 13:13:12,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:13:12,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 86 conjunts are in the unsatisfiable core [2021-05-02 13:13:12,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:12,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:12,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 935 proven. 7140 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 13:13:13,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440389518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:13,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:13,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87] total 89 [2021-05-02 13:13:13,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342556851] [2021-05-02 13:13:13,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 13:13:13,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:13,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 13:13:13,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 13:13:13,141 INFO L87 Difference]: Start difference. First operand 217 states and 224 transitions. Second operand has 89 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 88 states have internal predecessors, (185), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:21,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:21,498 INFO L93 Difference]: Finished difference Result 262 states and 277 transitions. [2021-05-02 13:13:21,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-02 13:13:21,499 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 88 states have internal predecessors, (185), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 216 [2021-05-02 13:13:21,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:21,500 INFO L225 Difference]: With dead ends: 262 [2021-05-02 13:13:21,500 INFO L226 Difference]: Without dead ends: 219 [2021-05-02 13:13:21,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3903 ImplicationChecksByTransitivity, 12631.7ms TimeCoverageRelationStatistics Valid=11311, Invalid=18791, Unknown=0, NotChecked=0, Total=30102 [2021-05-02 13:13:21,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-02 13:13:21,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2021-05-02 13:13:21,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.0373831775700935) internal successors, (222), 214 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:21,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 226 transitions. [2021-05-02 13:13:21,525 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 226 transitions. Word has length 216 [2021-05-02 13:13:21,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:21,525 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 226 transitions. [2021-05-02 13:13:21,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 88 states have internal predecessors, (185), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:21,525 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 226 transitions. [2021-05-02 13:13:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-05-02 13:13:21,526 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:21,526 INFO L523 BasicCegarLoop]: trace histogram [91, 85, 24, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:21,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-02 13:13:21,728 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:21,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:21,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2136869524, now seen corresponding path program 84 times [2021-05-02 13:13:21,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:21,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016118184] [2021-05-02 13:13:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:27,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8581 backedges. 946 proven. 7310 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 13:13:27,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:27,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016118184] [2021-05-02 13:13:27,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016118184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:27,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071717890] [2021-05-02 13:13:27,011 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 13:13:27,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-02 13:13:27,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:13:27,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 13:13:27,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:27,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8581 backedges. 971 proven. 300 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2021-05-02 13:13:29,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071717890] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:29,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:29,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 27] total 114 [2021-05-02 13:13:29,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809483670] [2021-05-02 13:13:29,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-02 13:13:29,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:29,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-02 13:13:29,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4180, Invalid=8702, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 13:13:29,621 INFO L87 Difference]: Start difference. First operand 219 states and 226 transitions. Second operand has 114 states, 114 states have (on average 1.9649122807017543) internal successors, (224), 113 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 13:13:43,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:43,126 INFO L93 Difference]: Finished difference Result 307 states and 344 transitions. [2021-05-02 13:13:43,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-02 13:13:43,128 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.9649122807017543) internal successors, (224), 113 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 218 [2021-05-02 13:13:43,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:43,129 INFO L225 Difference]: With dead ends: 307 [2021-05-02 13:13:43,129 INFO L226 Difference]: Without dead ends: 264 [2021-05-02 13:13:43,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9859 ImplicationChecksByTransitivity, 19666.1ms TimeCoverageRelationStatistics Valid=14770, Invalid=35630, Unknown=0, NotChecked=0, Total=50400 [2021-05-02 13:13:43,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-02 13:13:43,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 222. [2021-05-02 13:13:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.0368663594470047) internal successors, (225), 217 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 13:13:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 229 transitions. [2021-05-02 13:13:43,156 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 229 transitions. Word has length 218 [2021-05-02 13:13:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:43,156 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 229 transitions. [2021-05-02 13:13:43,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 114 states have (on average 1.9649122807017543) internal successors, (224), 113 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 13:13:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 229 transitions. [2021-05-02 13:13:43,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-05-02 13:13:43,157 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:43,157 INFO L523 BasicCegarLoop]: trace histogram [92, 86, 25, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:43,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:43,381 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:43,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:43,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1637799444, now seen corresponding path program 85 times [2021-05-02 13:13:43,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:43,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613825210] [2021-05-02 13:13:43,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:49,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8789 backedges. 957 proven. 7482 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-05-02 13:13:49,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:49,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613825210] [2021-05-02 13:13:49,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613825210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:49,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255629890] [2021-05-02 13:13:49,339 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 13:13:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:49,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 88 conjunts are in the unsatisfiable core [2021-05-02 13:13:49,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:49,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:49,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8789 backedges. 957 proven. 7482 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-05-02 13:13:50,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255629890] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:50,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:50,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89] total 91 [2021-05-02 13:13:50,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495261127] [2021-05-02 13:13:50,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 13:13:50,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:50,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 13:13:50,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 13:13:50,221 INFO L87 Difference]: Start difference. First operand 222 states and 229 transitions. Second operand has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 90 states have internal predecessors, (189), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:00,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:14:00,108 INFO L93 Difference]: Finished difference Result 268 states and 283 transitions. [2021-05-02 13:14:00,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 13:14:00,110 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 90 states have internal predecessors, (189), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2021-05-02 13:14:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:14:00,111 INFO L225 Difference]: With dead ends: 268 [2021-05-02 13:14:00,111 INFO L226 Difference]: Without dead ends: 224 [2021-05-02 13:14:00,113 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 14907.9ms TimeCoverageRelationStatistics Valid=11838, Invalid=19668, Unknown=0, NotChecked=0, Total=31506 [2021-05-02 13:14:00,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-02 13:14:00,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2021-05-02 13:14:00,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.0365296803652968) internal successors, (227), 219 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 13:14:00,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 231 transitions. [2021-05-02 13:14:00,139 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 231 transitions. Word has length 221 [2021-05-02 13:14:00,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:14:00,139 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 231 transitions. [2021-05-02 13:14:00,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 90 states have internal predecessors, (189), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:00,140 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 231 transitions. [2021-05-02 13:14:00,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-05-02 13:14:00,140 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:14:00,140 INFO L523 BasicCegarLoop]: trace histogram [93, 87, 25, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:14:00,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-02 13:14:00,345 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:14:00,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:14:00,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1423152457, now seen corresponding path program 86 times [2021-05-02 13:14:00,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:14:00,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652867345] [2021-05-02 13:14:00,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:14:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:06,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:14:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8974 backedges. 968 proven. 7656 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-05-02 13:14:06,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:14:06,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652867345] [2021-05-02 13:14:06,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652867345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:06,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769510969] [2021-05-02 13:14:06,565 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 13:14:06,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:14:06,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:14:06,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 89 conjunts are in the unsatisfiable core [2021-05-02 13:14:06,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:14:06,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:06,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8974 backedges. 968 proven. 7656 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-05-02 13:14:07,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769510969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:07,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:14:07,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90] total 92 [2021-05-02 13:14:07,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796241810] [2021-05-02 13:14:07,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 13:14:07,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:14:07,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 13:14:07,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 13:14:07,780 INFO L87 Difference]: Start difference. First operand 224 states and 231 transitions. Second operand has 92 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 91 states have internal predecessors, (191), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:18,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:14:18,401 INFO L93 Difference]: Finished difference Result 270 states and 285 transitions. [2021-05-02 13:14:18,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 13:14:18,403 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 91 states have internal predecessors, (191), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2021-05-02 13:14:18,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:14:18,404 INFO L225 Difference]: With dead ends: 270 [2021-05-02 13:14:18,404 INFO L226 Difference]: Without dead ends: 226 [2021-05-02 13:14:18,406 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4173 ImplicationChecksByTransitivity, 15998.7ms TimeCoverageRelationStatistics Valid=12106, Invalid=20114, Unknown=0, NotChecked=0, Total=32220 [2021-05-02 13:14:18,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-02 13:14:18,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2021-05-02 13:14:18,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.0361990950226245) internal successors, (229), 221 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 233 transitions. [2021-05-02 13:14:18,433 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 233 transitions. Word has length 223 [2021-05-02 13:14:18,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:14:18,433 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 233 transitions. [2021-05-02 13:14:18,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 91 states have internal predecessors, (191), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:18,433 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 233 transitions. [2021-05-02 13:14:18,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-05-02 13:14:18,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:14:18,434 INFO L523 BasicCegarLoop]: trace histogram [94, 88, 25, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:14:18,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:14:18,637 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:14:18,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:14:18,637 INFO L82 PathProgramCache]: Analyzing trace with hash 945331558, now seen corresponding path program 87 times [2021-05-02 13:14:18,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:14:18,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910499383] [2021-05-02 13:14:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:14:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:25,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:14:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9161 backedges. 979 proven. 7832 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-05-02 13:14:25,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:14:25,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910499383] [2021-05-02 13:14:25,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910499383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:25,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296925530] [2021-05-02 13:14:25,641 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 13:14:25,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-02 13:14:25,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:14:25,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 13:14:25,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:14:26,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:26,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:27,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:27,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9161 backedges. 1144 proven. 36 refuted. 0 times theorem prover too weak. 7981 trivial. 0 not checked. [2021-05-02 13:14:27,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296925530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:27,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:14:27,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 9] total 99 [2021-05-02 13:14:27,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187342882] [2021-05-02 13:14:27,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-05-02 13:14:27,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:14:27,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-05-02 13:14:27,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 13:14:27,334 INFO L87 Difference]: Start difference. First operand 226 states and 233 transitions. Second operand has 99 states, 99 states have (on average 2.090909090909091) internal successors, (207), 98 states have internal predecessors, (207), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:40,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:14:40,987 INFO L93 Difference]: Finished difference Result 275 states and 293 transitions. [2021-05-02 13:14:40,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-02 13:14:40,989 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.090909090909091) internal successors, (207), 98 states have internal predecessors, (207), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2021-05-02 13:14:40,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:14:40,990 INFO L225 Difference]: With dead ends: 275 [2021-05-02 13:14:40,990 INFO L226 Difference]: Without dead ends: 231 [2021-05-02 13:14:40,992 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4648 ImplicationChecksByTransitivity, 20485.3ms TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2021-05-02 13:14:40,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-02 13:14:41,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2021-05-02 13:14:41,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.04) internal successors, (234), 225 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:41,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 238 transitions. [2021-05-02 13:14:41,018 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 238 transitions. Word has length 225 [2021-05-02 13:14:41,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:14:41,018 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 238 transitions. [2021-05-02 13:14:41,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 99 states, 99 states have (on average 2.090909090909091) internal successors, (207), 98 states have internal predecessors, (207), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:14:41,019 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 238 transitions. [2021-05-02 13:14:41,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-05-02 13:14:41,019 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:14:41,020 INFO L523 BasicCegarLoop]: trace histogram [96, 89, 25, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:14:41,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:14:41,222 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:14:41,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:14:41,222 INFO L82 PathProgramCache]: Analyzing trace with hash -538012002, now seen corresponding path program 88 times [2021-05-02 13:14:41,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:14:41,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066256558] [2021-05-02 13:14:41,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:14:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:48,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:14:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9541 backedges. 1170 proven. 8010 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-05-02 13:14:48,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:14:48,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066256558] [2021-05-02 13:14:48,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066256558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:48,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418606525] [2021-05-02 13:14:48,753 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 13:14:48,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:14:48,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:14:48,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 91 conjunts are in the unsatisfiable core [2021-05-02 13:14:48,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:14:48,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:48,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:14:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9541 backedges. 1170 proven. 8010 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-05-02 13:14:49,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418606525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:49,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:14:49,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92] total 94 [2021-05-02 13:14:49,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160828328] [2021-05-02 13:14:49,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 13:14:49,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:14:49,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 13:14:49,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 13:14:49,848 INFO L87 Difference]: Start difference. First operand 230 states and 238 transitions. Second operand has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 93 states have internal predecessors, (195), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:02,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:02,181 INFO L93 Difference]: Finished difference Result 278 states and 295 transitions. [2021-05-02 13:15:02,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-02 13:15:02,184 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 93 states have internal predecessors, (195), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2021-05-02 13:15:02,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:02,185 INFO L225 Difference]: With dead ends: 278 [2021-05-02 13:15:02,185 INFO L226 Difference]: Without dead ends: 232 [2021-05-02 13:15:02,187 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4358 ImplicationChecksByTransitivity, 18901.1ms TimeCoverageRelationStatistics Valid=12651, Invalid=21021, Unknown=0, NotChecked=0, Total=33672 [2021-05-02 13:15:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-02 13:15:02,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2021-05-02 13:15:02,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.039647577092511) internal successors, (236), 227 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 240 transitions. [2021-05-02 13:15:02,215 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 240 transitions. Word has length 229 [2021-05-02 13:15:02,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:02,215 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 240 transitions. [2021-05-02 13:15:02,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.074468085106383) internal successors, (195), 93 states have internal predecessors, (195), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:02,215 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 240 transitions. [2021-05-02 13:15:02,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-05-02 13:15:02,216 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:02,216 INFO L523 BasicCegarLoop]: trace histogram [97, 90, 25, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:02,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:02,418 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:02,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:02,418 INFO L82 PathProgramCache]: Analyzing trace with hash 2074236155, now seen corresponding path program 89 times [2021-05-02 13:15:02,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:02,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46832311] [2021-05-02 13:15:02,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:10,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9734 backedges. 1183 proven. 8190 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-05-02 13:15:10,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:10,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46832311] [2021-05-02 13:15:10,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46832311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:10,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703025641] [2021-05-02 13:15:10,541 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 13:15:10,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 98 check-sat command(s) [2021-05-02 13:15:10,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:10,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 92 conjunts are in the unsatisfiable core [2021-05-02 13:15:10,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:10,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:10,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9734 backedges. 1183 proven. 8190 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-05-02 13:15:11,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703025641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:11,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:11,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93] total 95 [2021-05-02 13:15:11,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297040831] [2021-05-02 13:15:11,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 13:15:11,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:11,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 13:15:11,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 13:15:11,809 INFO L87 Difference]: Start difference. First operand 232 states and 240 transitions. Second operand has 95 states, 95 states have (on average 2.0736842105263156) internal successors, (197), 94 states have internal predecessors, (197), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:24,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:24,377 INFO L93 Difference]: Finished difference Result 280 states and 297 transitions. [2021-05-02 13:15:24,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-02 13:15:24,379 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0736842105263156) internal successors, (197), 94 states have internal predecessors, (197), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2021-05-02 13:15:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:24,380 INFO L225 Difference]: With dead ends: 280 [2021-05-02 13:15:24,380 INFO L226 Difference]: Without dead ends: 234 [2021-05-02 13:15:24,382 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4452 ImplicationChecksByTransitivity, 19563.3ms TimeCoverageRelationStatistics Valid=12928, Invalid=21482, Unknown=0, NotChecked=0, Total=34410 [2021-05-02 13:15:24,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-02 13:15:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-05-02 13:15:24,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.039301310043668) internal successors, (238), 229 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:24,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 242 transitions. [2021-05-02 13:15:24,410 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 242 transitions. Word has length 231 [2021-05-02 13:15:24,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:24,410 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 242 transitions. [2021-05-02 13:15:24,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 2.0736842105263156) internal successors, (197), 94 states have internal predecessors, (197), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:24,410 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 242 transitions. [2021-05-02 13:15:24,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-05-02 13:15:24,411 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:24,411 INFO L523 BasicCegarLoop]: trace histogram [98, 91, 25, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:24,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:24,612 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:24,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:24,613 INFO L82 PathProgramCache]: Analyzing trace with hash -111153128, now seen corresponding path program 90 times [2021-05-02 13:15:24,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:24,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123263772] [2021-05-02 13:15:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:32,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9929 backedges. 1196 proven. 8372 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-05-02 13:15:32,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:32,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123263772] [2021-05-02 13:15:32,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123263772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:32,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509395018] [2021-05-02 13:15:32,593 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 13:15:32,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-05-02 13:15:32,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:32,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 13:15:32,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:33,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9929 backedges. 1232 proven. 325 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2021-05-02 13:15:36,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509395018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:36,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:36,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 28] total 121 [2021-05-02 13:15:36,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295055965] [2021-05-02 13:15:36,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states [2021-05-02 13:15:36,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:36,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-05-02 13:15:36,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4750, Invalid=9770, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 13:15:36,693 INFO L87 Difference]: Start difference. First operand 234 states and 242 transitions. Second operand has 121 states, 121 states have (on average 1.975206611570248) internal successors, (239), 120 states have internal predecessors, (239), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:56,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:56,924 INFO L93 Difference]: Finished difference Result 339 states and 385 transitions. [2021-05-02 13:15:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-05-02 13:15:56,925 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.975206611570248) internal successors, (239), 120 states have internal predecessors, (239), 2 states have call successors, (4), 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 13:15:56,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:56,926 INFO L225 Difference]: With dead ends: 339 [2021-05-02 13:15:56,926 INFO L226 Difference]: Without dead ends: 293 [2021-05-02 13:15:56,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11234 ImplicationChecksByTransitivity, 28642.7ms TimeCoverageRelationStatistics Valid=16452, Invalid=40430, Unknown=0, NotChecked=0, Total=56882 [2021-05-02 13:15:56,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-02 13:15:56,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 237. [2021-05-02 13:15:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.0387931034482758) internal successors, (241), 232 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:56,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 245 transitions. [2021-05-02 13:15:56,968 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 245 transitions. Word has length 233 [2021-05-02 13:15:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:56,968 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 245 transitions. [2021-05-02 13:15:56,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 121 states, 121 states have (on average 1.975206611570248) internal successors, (239), 120 states have internal predecessors, (239), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:56,968 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 245 transitions. [2021-05-02 13:15:56,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-05-02 13:15:56,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:56,970 INFO L523 BasicCegarLoop]: trace histogram [99, 92, 26, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:57,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-05-02 13:15:57,185 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:57,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:57,185 INFO L82 PathProgramCache]: Analyzing trace with hash -933098994, now seen corresponding path program 91 times [2021-05-02 13:15:57,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:57,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591730277] [2021-05-02 13:15:57,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:04,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 1209 proven. 8556 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-05-02 13:16:04,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:04,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591730277] [2021-05-02 13:16:04,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591730277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:04,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026839600] [2021-05-02 13:16:04,299 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 13:16:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:04,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 94 conjunts are in the unsatisfiable core [2021-05-02 13:16:04,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:04,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 1209 proven. 8556 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-05-02 13:16:05,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026839600] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:05,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:05,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95] total 97 [2021-05-02 13:16:05,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768253996] [2021-05-02 13:16:05,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 13:16:05,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:05,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 13:16:05,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 13:16:05,509 INFO L87 Difference]: Start difference. First operand 237 states and 245 transitions. Second operand has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 96 states have internal predecessors, (201), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:16:16,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:16,629 INFO L93 Difference]: Finished difference Result 286 states and 303 transitions. [2021-05-02 13:16:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 13:16:16,631 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 96 states have internal predecessors, (201), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 236 [2021-05-02 13:16:16,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:16,632 INFO L225 Difference]: With dead ends: 286 [2021-05-02 13:16:16,632 INFO L226 Difference]: Without dead ends: 239 [2021-05-02 13:16:16,633 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 17292.2ms TimeCoverageRelationStatistics Valid=13491, Invalid=22419, Unknown=0, NotChecked=0, Total=35910 [2021-05-02 13:16:16,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-02 13:16:16,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-05-02 13:16:16,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0384615384615385) internal successors, (243), 234 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:16:16,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 247 transitions. [2021-05-02 13:16:16,662 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 247 transitions. Word has length 236 [2021-05-02 13:16:16,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:16,662 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 247 transitions. [2021-05-02 13:16:16,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 96 states have internal predecessors, (201), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:16:16,662 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 247 transitions. [2021-05-02 13:16:16,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-05-02 13:16:16,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:16,663 INFO L523 BasicCegarLoop]: trace histogram [100, 93, 26, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:16,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:16,864 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:16,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:16,864 INFO L82 PathProgramCache]: Analyzing trace with hash 157931793, now seen corresponding path program 92 times [2021-05-02 13:16:16,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:16,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668294104] [2021-05-02 13:16:16,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:23,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10351 backedges. 1222 proven. 8742 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-05-02 13:16:23,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:23,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668294104] [2021-05-02 13:16:23,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668294104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:23,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503054709] [2021-05-02 13:16:23,636 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 13:16:23,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:16:23,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:23,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-02 13:16:23,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:23,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10351 backedges. 1222 proven. 8742 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-05-02 13:16:24,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503054709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:24,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:24,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96] total 98 [2021-05-02 13:16:24,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746855348] [2021-05-02 13:16:24,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 13:16:24,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:24,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 13:16:24,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 13:16:24,847 INFO L87 Difference]: Start difference. First operand 239 states and 247 transitions. Second operand has 98 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 97 states have internal predecessors, (203), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:16:36,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:36,355 INFO L93 Difference]: Finished difference Result 288 states and 305 transitions. [2021-05-02 13:16:36,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 13:16:36,356 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 97 states have internal predecessors, (203), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 238 [2021-05-02 13:16:36,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:36,357 INFO L225 Difference]: With dead ends: 288 [2021-05-02 13:16:36,357 INFO L226 Difference]: Without dead ends: 241 [2021-05-02 13:16:36,358 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4740 ImplicationChecksByTransitivity, 17511.9ms TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2021-05-02 13:16:36,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-02 13:16:36,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-05-02 13:16:36,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0381355932203389) internal successors, (245), 236 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:16:36,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 249 transitions. [2021-05-02 13:16:36,401 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 249 transitions. Word has length 238 [2021-05-02 13:16:36,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:36,402 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 249 transitions. [2021-05-02 13:16:36,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 97 states have internal predecessors, (203), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:16:36,402 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 249 transitions. [2021-05-02 13:16:36,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-05-02 13:16:36,402 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:36,403 INFO L523 BasicCegarLoop]: trace histogram [101, 94, 26, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:36,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-05-02 13:16:36,603 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:36,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:36,603 INFO L82 PathProgramCache]: Analyzing trace with hash 666497876, now seen corresponding path program 93 times [2021-05-02 13:16:36,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:36,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693285500] [2021-05-02 13:16:36,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:43,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10552 backedges. 1235 proven. 8930 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-05-02 13:16:43,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:43,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693285500] [2021-05-02 13:16:43,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693285500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:43,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532960950] [2021-05-02 13:16:43,933 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 13:16:44,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-02 13:16:44,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:44,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 13:16:44,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:44,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:45,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:46,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10552 backedges. 1271 proven. 351 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2021-05-02 13:16:47,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532960950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:47,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:47,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 29] total 125 [2021-05-02 13:16:47,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763943047] [2021-05-02 13:16:47,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 125 states [2021-05-02 13:16:47,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:47,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-05-02 13:16:47,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5063, Invalid=10437, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 13:16:47,694 INFO L87 Difference]: Start difference. First operand 241 states and 249 transitions. Second operand has 125 states, 125 states have (on average 1.968) internal successors, (246), 124 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 13:17:07,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:07,476 INFO L93 Difference]: Finished difference Result 347 states and 393 transitions. [2021-05-02 13:17:07,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-02 13:17:07,478 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.968) internal successors, (246), 124 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 240 [2021-05-02 13:17:07,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:07,479 INFO L225 Difference]: With dead ends: 347 [2021-05-02 13:17:07,479 INFO L226 Difference]: Without dead ends: 300 [2021-05-02 13:17:07,481 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11979 ImplicationChecksByTransitivity, 27423.6ms TimeCoverageRelationStatistics Valid=17653, Invalid=43109, Unknown=0, NotChecked=0, Total=60762 [2021-05-02 13:17:07,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-02 13:17:07,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 244. [2021-05-02 13:17:07,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.0376569037656904) internal successors, (248), 239 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:17:07,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 252 transitions. [2021-05-02 13:17:07,512 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 252 transitions. Word has length 240 [2021-05-02 13:17:07,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:07,512 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 252 transitions. [2021-05-02 13:17:07,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 125 states, 125 states have (on average 1.968) internal successors, (246), 124 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 13:17:07,512 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 252 transitions. [2021-05-02 13:17:07,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-05-02 13:17:07,513 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:07,513 INFO L523 BasicCegarLoop]: trace histogram [102, 95, 27, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:07,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:07,714 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:07,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:07,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1564661100, now seen corresponding path program 94 times [2021-05-02 13:17:07,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:07,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498169342] [2021-05-02 13:17:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:15,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10782 backedges. 1248 proven. 9120 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-05-02 13:17:15,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:15,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498169342] [2021-05-02 13:17:15,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498169342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:15,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885212926] [2021-05-02 13:17:15,501 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 13:17:15,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:17:15,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:17:15,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 97 conjunts are in the unsatisfiable core [2021-05-02 13:17:15,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:15,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:15,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10782 backedges. 1248 proven. 9120 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-05-02 13:17:16,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885212926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:16,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:16,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98] total 100 [2021-05-02 13:17:16,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297073939] [2021-05-02 13:17:16,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 13:17:16,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:16,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 13:17:16,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 13:17:16,812 INFO L87 Difference]: Start difference. First operand 244 states and 252 transitions. Second operand has 100 states, 100 states have (on average 2.07) internal successors, (207), 99 states have internal predecessors, (207), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:17:29,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:29,858 INFO L93 Difference]: Finished difference Result 294 states and 311 transitions. [2021-05-02 13:17:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-02 13:17:29,860 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.07) internal successors, (207), 99 states have internal predecessors, (207), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2021-05-02 13:17:29,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:29,861 INFO L225 Difference]: With dead ends: 294 [2021-05-02 13:17:29,861 INFO L226 Difference]: Without dead ends: 246 [2021-05-02 13:17:29,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4937 ImplicationChecksByTransitivity, 20045.0ms TimeCoverageRelationStatistics Valid=14358, Invalid=23862, Unknown=0, NotChecked=0, Total=38220 [2021-05-02 13:17:29,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-02 13:17:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2021-05-02 13:17:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.037344398340249) internal successors, (250), 241 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:17:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 254 transitions. [2021-05-02 13:17:29,893 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 254 transitions. Word has length 243 [2021-05-02 13:17:29,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:29,893 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 254 transitions. [2021-05-02 13:17:29,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 2.07) internal successors, (207), 99 states have internal predecessors, (207), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:17:29,894 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 254 transitions. [2021-05-02 13:17:29,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-05-02 13:17:29,894 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:29,895 INFO L523 BasicCegarLoop]: trace histogram [103, 96, 27, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:30,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:30,118 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:30,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2126009079, now seen corresponding path program 95 times [2021-05-02 13:17:30,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:30,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646030951] [2021-05-02 13:17:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:38,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10987 backedges. 1261 proven. 9312 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-05-02 13:17:38,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:38,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646030951] [2021-05-02 13:17:38,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646030951] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:38,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466853403] [2021-05-02 13:17:38,631 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 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 13:17:38,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 104 check-sat command(s) [2021-05-02 13:17:38,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:17:38,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 98 conjunts are in the unsatisfiable core [2021-05-02 13:17:38,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:38,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:38,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10987 backedges. 1261 proven. 9312 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-05-02 13:17:40,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466853403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:40,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:40,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99] total 101 [2021-05-02 13:17:40,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722488385] [2021-05-02 13:17:40,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-02 13:17:40,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:40,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-02 13:17:40,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 13:17:40,141 INFO L87 Difference]: Start difference. First operand 246 states and 254 transitions. Second operand has 101 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 100 states have internal predecessors, (209), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:17:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:53,709 INFO L93 Difference]: Finished difference Result 296 states and 313 transitions. [2021-05-02 13:17:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-02 13:17:53,710 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 100 states have internal predecessors, (209), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2021-05-02 13:17:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:53,711 INFO L225 Difference]: With dead ends: 296 [2021-05-02 13:17:53,711 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 13:17:53,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5037 ImplicationChecksByTransitivity, 21233.5ms TimeCoverageRelationStatistics Valid=14653, Invalid=24353, Unknown=0, NotChecked=0, Total=39006 [2021-05-02 13:17:53,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 13:17:53,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2021-05-02 13:17:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 243 states have (on average 1.037037037037037) internal successors, (252), 243 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:17:53,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 256 transitions. [2021-05-02 13:17:53,747 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 256 transitions. Word has length 245 [2021-05-02 13:17:53,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:53,747 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 256 transitions. [2021-05-02 13:17:53,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 100 states have internal predecessors, (209), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:17:53,747 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 256 transitions. [2021-05-02 13:17:53,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-05-02 13:17:53,748 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:53,748 INFO L523 BasicCegarLoop]: trace histogram [104, 97, 27, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:53,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-02 13:17:53,948 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:53,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:53,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1217064602, now seen corresponding path program 96 times [2021-05-02 13:17:53,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:53,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638166090] [2021-05-02 13:17:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:03,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11194 backedges. 1274 proven. 9506 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-05-02 13:18:03,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:03,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638166090] [2021-05-02 13:18:03,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638166090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:03,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624709118] [2021-05-02 13:18:03,058 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 13:18:03,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-05-02 13:18:03,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:18:03,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 13:18:03,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:04,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:04,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:05,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:06,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:06,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:06,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:06,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:06,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:06,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:06,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:06,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:06,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:06,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:06,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:06,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:06,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:06,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:06,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:06,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11194 backedges. 1310 proven. 378 refuted. 0 times theorem prover too weak. 9506 trivial. 0 not checked. [2021-05-02 13:18:07,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624709118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:07,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:07,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 30] total 129 [2021-05-02 13:18:07,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571144089] [2021-05-02 13:18:07,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 129 states [2021-05-02 13:18:07,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:07,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-05-02 13:18:07,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5386, Invalid=11126, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 13:18:07,692 INFO L87 Difference]: Start difference. First operand 248 states and 256 transitions. Second operand has 129 states, 129 states have (on average 1.9612403100775193) internal successors, (253), 128 states have internal predecessors, (253), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:18:30,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:30,986 INFO L93 Difference]: Finished difference Result 355 states and 401 transitions. [2021-05-02 13:18:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-05-02 13:18:30,988 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.9612403100775193) internal successors, (253), 128 states have internal predecessors, (253), 2 states have call successors, (4), 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 247 [2021-05-02 13:18:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:30,989 INFO L225 Difference]: With dead ends: 355 [2021-05-02 13:18:30,990 INFO L226 Difference]: Without dead ends: 307 [2021-05-02 13:18:30,992 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12746 ImplicationChecksByTransitivity, 33766.6ms TimeCoverageRelationStatistics Valid=18896, Invalid=45874, Unknown=0, NotChecked=0, Total=64770 [2021-05-02 13:18:30,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-05-02 13:18:31,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 251. [2021-05-02 13:18:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.0365853658536586) internal successors, (255), 246 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:18:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 259 transitions. [2021-05-02 13:18:31,024 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 259 transitions. Word has length 247 [2021-05-02 13:18:31,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:18:31,024 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 259 transitions. [2021-05-02 13:18:31,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 129 states, 129 states have (on average 1.9612403100775193) internal successors, (253), 128 states have internal predecessors, (253), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:18:31,024 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 259 transitions. [2021-05-02 13:18:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-05-02 13:18:31,025 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:18:31,025 INFO L523 BasicCegarLoop]: trace histogram [105, 98, 28, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:31,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-02 13:18:31,227 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:31,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:31,227 INFO L82 PathProgramCache]: Analyzing trace with hash -442646208, now seen corresponding path program 97 times [2021-05-02 13:18:31,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:31,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118340082] [2021-05-02 13:18:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:41,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11431 backedges. 1287 proven. 9702 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 13:18:41,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:41,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118340082] [2021-05-02 13:18:41,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118340082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:41,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998832520] [2021-05-02 13:18:41,674 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 13:18:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:41,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 100 conjunts are in the unsatisfiable core [2021-05-02 13:18:41,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:41,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:41,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11431 backedges. 1287 proven. 9702 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 13:18:43,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998832520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:43,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:43,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101] total 103 [2021-05-02 13:18:43,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835958691] [2021-05-02 13:18:43,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-02 13:18:43,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:43,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-02 13:18:43,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 13:18:43,448 INFO L87 Difference]: Start difference. First operand 251 states and 259 transitions. Second operand has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 102 states have internal predecessors, (213), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:18:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:59,992 INFO L93 Difference]: Finished difference Result 302 states and 319 transitions. [2021-05-02 13:18:59,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 13:18:59,994 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 102 states have internal predecessors, (213), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 250 [2021-05-02 13:18:59,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:59,995 INFO L225 Difference]: With dead ends: 302 [2021-05-02 13:18:59,995 INFO L226 Difference]: Without dead ends: 253 [2021-05-02 13:18:59,996 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5240 ImplicationChecksByTransitivity, 25688.4ms TimeCoverageRelationStatistics Valid=15252, Invalid=25350, Unknown=0, NotChecked=0, Total=40602 [2021-05-02 13:18:59,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-02 13:19:00,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2021-05-02 13:19:00,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0362903225806452) internal successors, (257), 248 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:19:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 261 transitions. [2021-05-02 13:19:00,032 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 261 transitions. Word has length 250 [2021-05-02 13:19:00,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:19:00,032 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 261 transitions. [2021-05-02 13:19:00,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 102 states have internal predecessors, (213), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:19:00,032 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 261 transitions. [2021-05-02 13:19:00,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-05-02 13:19:00,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:19:00,033 INFO L523 BasicCegarLoop]: trace histogram [106, 99, 28, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:19:00,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:00,235 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:19:00,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:19:00,235 INFO L82 PathProgramCache]: Analyzing trace with hash -958296317, now seen corresponding path program 98 times [2021-05-02 13:19:00,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:19:00,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374760665] [2021-05-02 13:19:00,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:19:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:11,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:19:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11642 backedges. 1300 proven. 9900 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 13:19:11,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:19:11,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374760665] [2021-05-02 13:19:11,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374760665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:11,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223715974] [2021-05-02 13:19:11,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:11,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:19:11,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:19:11,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 101 conjunts are in the unsatisfiable core [2021-05-02 13:19:11,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:19:11,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:11,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11642 backedges. 1300 proven. 9900 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 13:19:13,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223715974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:13,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:19:13,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102] total 104 [2021-05-02 13:19:13,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543340782] [2021-05-02 13:19:13,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-02 13:19:13,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:19:13,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-02 13:19:13,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 13:19:13,327 INFO L87 Difference]: Start difference. First operand 253 states and 261 transitions. Second operand has 104 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 103 states have internal predecessors, (215), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)