/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/sumt7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:21:53,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:21:53,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:21:53,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:21:53,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:21:53,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:21:53,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:21:53,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:21:53,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:21:53,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:21:53,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:21:53,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:21:53,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:21:53,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:21:53,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:21:53,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:21:53,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:21:53,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:21:53,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:21:53,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:21:53,127 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 13:21:53,174 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:21:53,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:21:53,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:21:53,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:21:53,177 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:21:53,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:21:53,177 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:21:53,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:21:53,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:21:53,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:21:53,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:21:53,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:21:53,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:21:53,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:21:53,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:21:53,179 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:21:53,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:21:53,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:21:53,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:21:53,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:21:53,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:21:53,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:21:53,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:21:53,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:21:53,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:21:53,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:21:53,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:21:53,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:21:53,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:21:53,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:21:53,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:21:53,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:21:53,412 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:21:53,413 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:21:53,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt7.c [2021-05-02 13:21:53,459 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b846dc149/a8c957bb6e1d47c79df3495664bc535e/FLAG1ef8c3f61 [2021-05-02 13:21:53,793 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:21:53,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt7.c [2021-05-02 13:21:53,798 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b846dc149/a8c957bb6e1d47c79df3495664bc535e/FLAG1ef8c3f61 [2021-05-02 13:21:53,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b846dc149/a8c957bb6e1d47c79df3495664bc535e [2021-05-02 13:21:53,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:21:53,818 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:21:53,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:21:53,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:21:53,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:21:53,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:21:53" (1/1) ... [2021-05-02 13:21:53,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22b31fd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:21:53, skipping insertion in model container [2021-05-02 13:21:53,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:21:53" (1/1) ... [2021-05-02 13:21:53,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:21:53,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:21:53,934 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/sumt7.c[403,416] [2021-05-02 13:21:53,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:21:53,953 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:21:53,997 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/sumt7.c[403,416] [2021-05-02 13:21:54,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:21:54,021 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:21:54,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:21:54 WrapperNode [2021-05-02 13:21:54,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:21:54,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:21:54,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:21:54,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:21:54,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:21:54" (1/1) ... [2021-05-02 13:21:54,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:21:54" (1/1) ... [2021-05-02 13:21:54,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:21:54" (1/1) ... [2021-05-02 13:21:54,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:21:54" (1/1) ... [2021-05-02 13:21:54,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:21:54" (1/1) ... [2021-05-02 13:21:54,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:21:54" (1/1) ... [2021-05-02 13:21:54,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:21:54" (1/1) ... [2021-05-02 13:21:54,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:21:54,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:21:54,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:21:54,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:21:54,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:21:54" (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 13:21:54,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:21:54,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:21:54,119 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:21:54,119 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:21:54,120 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:21:54,120 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:21:54,120 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:21:54,120 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:21:54,120 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:21:54,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:21:54,120 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:21:54,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:21:54,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:21:54,121 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:21:54,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:21:54,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:21:54,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:21:54,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:21:54,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:21:54,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:21:54,408 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:21:54,408 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:21:54,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:21:54 BoogieIcfgContainer [2021-05-02 13:21:54,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:21:54,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:21:54,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:21:54,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:21:54,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:21:53" (1/3) ... [2021-05-02 13:21:54,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ee8825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:21:54, skipping insertion in model container [2021-05-02 13:21:54,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:21:54" (2/3) ... [2021-05-02 13:21:54,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ee8825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:21:54, skipping insertion in model container [2021-05-02 13:21:54,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:21:54" (3/3) ... [2021-05-02 13:21:54,414 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt7.c [2021-05-02 13:21:54,433 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:21:54,435 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:21:54,447 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:21:54,470 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:21:54,470 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:21:54,470 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:21:54,470 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:21:54,470 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:21:54,470 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:21:54,470 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:21:54,470 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:21:54,488 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 21 states have internal predecessors, (30), 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 13:21:54,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 13:21:54,492 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:21:54,492 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:21:54,492 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:21:54,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:21:54,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1555439542, now seen corresponding path program 1 times [2021-05-02 13:21:54,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:21:54,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901951431] [2021-05-02 13:21:54,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:21:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:54,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:21:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:54,995 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 13:21:54,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:21:54,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901951431] [2021-05-02 13:21:54,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901951431] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:21:54,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:21:54,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 13:21:54,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491424586] [2021-05-02 13:21:54,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:21:55,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:21:55,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:21:55,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:21:55,008 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 21 states have internal predecessors, (30), 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 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 13:21:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:21:55,488 INFO L93 Difference]: Finished difference Result 68 states and 99 transitions. [2021-05-02 13:21:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:21:55,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 13:21:55,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:21:55,493 INFO L225 Difference]: With dead ends: 68 [2021-05-02 13:21:55,494 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 13:21:55,496 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 417.2ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:21:55,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 13:21:55,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-05-02 13:21:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:21:55,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-05-02 13:21:55,520 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2021-05-02 13:21:55,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:21:55,520 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-05-02 13:21:55,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 13:21:55,521 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-05-02 13:21:55,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:21:55,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:21:55,522 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:21:55,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:21:55,522 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:21:55,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:21:55,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1572266990, now seen corresponding path program 1 times [2021-05-02 13:21:55,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:21:55,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004702848] [2021-05-02 13:21:55,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:21:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:55,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:21:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:55,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:21:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:21:55,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:21:55,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004702848] [2021-05-02 13:21:55,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004702848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:55,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102542255] [2021-05-02 13:21:55,674 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 13:21:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:55,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 13:21:55,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:21:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:21:56,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102542255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:56,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:21:56,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11] total 14 [2021-05-02 13:21:56,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822620103] [2021-05-02 13:21:56,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:21:56,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:21:56,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:21:56,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:21:56,030 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:21:56,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:21:56,459 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2021-05-02 13:21:56,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:21:56,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-05-02 13:21:56,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:21:56,460 INFO L225 Difference]: With dead ends: 53 [2021-05-02 13:21:56,460 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 13:21:56,461 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 460.7ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:21:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 13:21:56,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 13:21:56,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:21:56,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-05-02 13:21:56,466 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 22 [2021-05-02 13:21:56,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:21:56,466 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-05-02 13:21:56,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:21:56,467 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-05-02 13:21:56,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 13:21:56,467 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:21:56,467 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:21:56,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:21:56,681 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:21:56,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:21:56,682 INFO L82 PathProgramCache]: Analyzing trace with hash -463332991, now seen corresponding path program 1 times [2021-05-02 13:21:56,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:21:56,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766664763] [2021-05-02 13:21:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:21:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:56,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:21:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:56,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:21:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:21:56,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:21:56,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766664763] [2021-05-02 13:21:56,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766664763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:56,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139266780] [2021-05-02 13:21:56,912 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 13:21:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:56,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 13:21:56,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:21:57,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:57,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:57,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:57,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:57,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:21:57,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139266780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:57,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:21:57,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-05-02 13:21:57,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208590866] [2021-05-02 13:21:57,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 13:21:57,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:21:57,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 13:21:57,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:21:57,174 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:21:57,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:21:57,720 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2021-05-02 13:21:57,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:21:57,721 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-05-02 13:21:57,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:21:57,725 INFO L225 Difference]: With dead ends: 65 [2021-05-02 13:21:57,725 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 13:21:57,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 541.8ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-05-02 13:21:57,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 13:21:57,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-02 13:21:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:21:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-05-02 13:21:57,741 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 27 [2021-05-02 13:21:57,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:21:57,742 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-05-02 13:21:57,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:21:57,742 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-05-02 13:21:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 13:21:57,743 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:21:57,743 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:21:57,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:57,949 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:21:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:21:57,949 INFO L82 PathProgramCache]: Analyzing trace with hash 992473176, now seen corresponding path program 1 times [2021-05-02 13:21:57,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:21:57,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862564660] [2021-05-02 13:21:57,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:21:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:58,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:21:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:58,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:21:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:58,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-02 13:21:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:21:58,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:21:58,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862564660] [2021-05-02 13:21:58,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862564660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:58,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157695134] [2021-05-02 13:21:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:58,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 13:21:58,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:21:58,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:58,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:58,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:58,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:58,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:58,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:58,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:21:58,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157695134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:58,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:21:58,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-05-02 13:21:58,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190394945] [2021-05-02 13:21:58,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 13:21:58,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:21:58,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 13:21:58,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 13:21:58,537 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:21:59,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:21:59,148 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2021-05-02 13:21:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 13:21:59,150 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 40 [2021-05-02 13:21:59,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:21:59,152 INFO L225 Difference]: With dead ends: 77 [2021-05-02 13:21:59,152 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 13:21:59,152 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 660.9ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-05-02 13:21:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 13:21:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-05-02 13:21:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:21:59,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-05-02 13:21:59,166 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 40 [2021-05-02 13:21:59,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:21:59,166 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-05-02 13:21:59,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:21:59,167 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-05-02 13:21:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 13:21:59,170 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:21:59,170 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:21:59,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:59,381 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:21:59,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:21:59,381 INFO L82 PathProgramCache]: Analyzing trace with hash -760606038, now seen corresponding path program 1 times [2021-05-02 13:21:59,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:21:59,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632021838] [2021-05-02 13:21:59,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:21:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:59,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:21:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:59,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:21:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:59,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-02 13:21:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:59,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-05-02 13:21:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 13:21:59,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:21:59,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632021838] [2021-05-02 13:21:59,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632021838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:59,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288985227] [2021-05-02 13:21:59,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:59,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 13:21:59,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:21:59,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:59,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:59,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:59,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:59,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:59,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:00,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:00,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:00,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:22:00,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288985227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:00,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:22:00,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-05-02 13:22:00,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551997591] [2021-05-02 13:22:00,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 13:22:00,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:22:00,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 13:22:00,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-02 13:22:00,061 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 24 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 13:22:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:22:00,837 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2021-05-02 13:22:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 13:22:00,838 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 52 [2021-05-02 13:22:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:22:00,839 INFO L225 Difference]: With dead ends: 88 [2021-05-02 13:22:00,839 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 13:22:00,839 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 854.1ms TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 13:22:00,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 13:22:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 13:22:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 states have internal predecessors, (66), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:22:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-05-02 13:22:00,844 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 52 [2021-05-02 13:22:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:22:00,845 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-05-02 13:22:00,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 13:22:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-05-02 13:22:00,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 13:22:00,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:22:00,845 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:22:01,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:22:01,057 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:22:01,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:22:01,057 INFO L82 PathProgramCache]: Analyzing trace with hash -877388364, now seen corresponding path program 1 times [2021-05-02 13:22:01,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:22:01,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996214209] [2021-05-02 13:22:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:22:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:01,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:22:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:01,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:22:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:01,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-02 13:22:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:01,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-05-02 13:22:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:01,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 13:22:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 13:22:01,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:22:01,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996214209] [2021-05-02 13:22:01,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996214209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:01,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509935405] [2021-05-02 13:22:01,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:22:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:01,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 13:22:01,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:22:01,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:01,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:01,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:01,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:01,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:01,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:01,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:01,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:01,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:01,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:01,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 7 proven. 72 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 13:22:01,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509935405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:01,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:22:01,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-05-02 13:22:01,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109541224] [2021-05-02 13:22:01,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 13:22:01,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:22:01,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 13:22:01,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-05-02 13:22:01,844 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 28 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 13:22:02,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:22:02,978 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2021-05-02 13:22:02,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 13:22:02,978 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 63 [2021-05-02 13:22:02,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:22:02,979 INFO L225 Difference]: With dead ends: 98 [2021-05-02 13:22:02,979 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 13:22:02,980 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1020.3ms TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 13:22:02,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 13:22:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-02 13:22:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 13:22:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-05-02 13:22:02,985 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 63 [2021-05-02 13:22:02,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:22:02,985 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-05-02 13:22:02,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 13:22:02,985 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-05-02 13:22:02,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 13:22:02,986 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:22:02,986 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:22:03,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:22:03,207 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:22:03,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:22:03,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2039894261, now seen corresponding path program 1 times [2021-05-02 13:22:03,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:22:03,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872313867] [2021-05-02 13:22:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:22:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:03,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:22:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:03,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:22:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:03,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-02 13:22:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:03,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-05-02 13:22:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:03,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 13:22:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:03,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-05-02 13:22:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 13:22:03,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:22:03,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872313867] [2021-05-02 13:22:03,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872313867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:03,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176888171] [2021-05-02 13:22:03,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:22:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:03,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 13:22:03,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:22:03,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:03,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:03,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:03,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:03,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:03,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:03,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:03,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:04,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:04,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:04,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:04,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:04,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 9 proven. 103 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 13:22:04,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176888171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:04,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:22:04,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-05-02 13:22:04,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693483117] [2021-05-02 13:22:04,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 13:22:04,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:22:04,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 13:22:04,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-05-02 13:22:04,135 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 32 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:22:05,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:22:05,376 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2021-05-02 13:22:05,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 13:22:05,377 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 73 [2021-05-02 13:22:05,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:22:05,377 INFO L225 Difference]: With dead ends: 107 [2021-05-02 13:22:05,377 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 13:22:05,378 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1191.1ms TimeCoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 13:22:05,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 13:22:05,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-05-02 13:22:05,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 74 states have internal predecessors, (81), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:22:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2021-05-02 13:22:05,384 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 73 [2021-05-02 13:22:05,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:22:05,384 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2021-05-02 13:22:05,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:22:05,384 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2021-05-02 13:22:05,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 13:22:05,385 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:22:05,385 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:22:05,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:22:05,601 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:22:05,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:22:05,601 INFO L82 PathProgramCache]: Analyzing trace with hash 414402136, now seen corresponding path program 1 times [2021-05-02 13:22:05,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:22:05,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961764925] [2021-05-02 13:22:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:22:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:05,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:22:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:05,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:22:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:05,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-02 13:22:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:05,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-05-02 13:22:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:05,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 13:22:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:05,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-05-02 13:22:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:05,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-05-02 13:22:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 12 proven. 119 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 13:22:05,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:22:05,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961764925] [2021-05-02 13:22:05,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961764925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:05,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170277940] [2021-05-02 13:22:05,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:22:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:06,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 13:22:06,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:22:06,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 11 proven. 135 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 13:22:06,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170277940] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:06,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:22:06,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-05-02 13:22:06,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769262409] [2021-05-02 13:22:06,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 13:22:06,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:22:06,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 13:22:06,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 13:22:06,612 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 36 states, 34 states have (on average 2.823529411764706) internal successors, (96), 34 states have internal predecessors, (96), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 13:22:08,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:22:08,092 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-05-02 13:22:08,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 13:22:08,093 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.823529411764706) internal successors, (96), 34 states have internal predecessors, (96), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 82 [2021-05-02 13:22:08,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:22:08,093 INFO L225 Difference]: With dead ends: 124 [2021-05-02 13:22:08,093 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 13:22:08,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 1519.8ms TimeCoverageRelationStatistics Valid=341, Invalid=2851, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 13:22:08,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 13:22:08,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2021-05-02 13:22:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 82 states have internal predecessors, (88), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 13:22:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2021-05-02 13:22:08,103 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 82 [2021-05-02 13:22:08,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:22:08,103 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2021-05-02 13:22:08,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 34 states have (on average 2.823529411764706) internal successors, (96), 34 states have internal predecessors, (96), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 13:22:08,103 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2021-05-02 13:22:08,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 13:22:08,105 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:22:08,105 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 6, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:22:08,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:22:08,323 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:22:08,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:22:08,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1076338448, now seen corresponding path program 2 times [2021-05-02 13:22:08,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:22:08,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350701730] [2021-05-02 13:22:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:22:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:08,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:22:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:08,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 13:22:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:08,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-02 13:22:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:08,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-05-02 13:22:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:08,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 13:22:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:08,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-05-02 13:22:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:08,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-05-02 13:22:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:08,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-05-02 13:22:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:08,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-05-02 13:22:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 32 proven. 163 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-02 13:22:08,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:22:08,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350701730] [2021-05-02 13:22:08,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350701730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:08,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608369578] [2021-05-02 13:22:08,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true