/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:21:56,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:21:56,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:21:56,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:21:56,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:21:56,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:21:56,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:21:56,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:21:56,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:21:56,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:21:56,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:21:56,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:21:56,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:21:56,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:21:56,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:21:56,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:21:56,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:21:56,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:21:56,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:21:56,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:21:56,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:21:56,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:21:56,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:21:56,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:21:56,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:21:56,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:21:56,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:21:56,862 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:21:56,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:21:56,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:21:56,865 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:21:56,866 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:21:56,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:21:56,868 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:21:56,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:21:56,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:21:56,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:21:56,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:21:56,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:21:56,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:21:56,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:21:56,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 17:21:56,925 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:21:56,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:21:56,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:21:56,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:21:56,928 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:21:56,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:21:56,929 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:21:56,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:21:56,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:21:56,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:21:56,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:21:56,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:21:56,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:21:56,932 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:21:56,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:21:56,932 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:21:56,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:21:56,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:21:56,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:21:56,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:21:56,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:21:56,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:21:56,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:21:56,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:21:56,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:21:56,934 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:21:56,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:21:56,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:21:56,935 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:21:56,935 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; [2020-09-24 17:21:57,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:21:57,407 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:21:57,412 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:21:57,414 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:21:57,414 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:21:57,415 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2020-09-24 17:21:57,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bb63a3b0/072a4605a32149fca8a7945c90a5b444/FLAG737f4d95d [2020-09-24 17:21:58,032 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:21:58,033 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/nested6.i [2020-09-24 17:21:58,042 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bb63a3b0/072a4605a32149fca8a7945c90a5b444/FLAG737f4d95d [2020-09-24 17:21:58,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bb63a3b0/072a4605a32149fca8a7945c90a5b444 [2020-09-24 17:21:58,402 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:21:58,408 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:21:58,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:21:58,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:21:58,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:21:58,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:21:58" (1/1) ... [2020-09-24 17:21:58,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40201f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:58, skipping insertion in model container [2020-09-24 17:21:58,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:21:58" (1/1) ... [2020-09-24 17:21:58,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:21:58,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:21:58,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:21:58,675 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:21:58,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:21:58,718 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:21:58,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:58 WrapperNode [2020-09-24 17:21:58,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:21:58,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:21:58,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:21:58,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:21:58,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:58" (1/1) ... [2020-09-24 17:21:58,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:58" (1/1) ... [2020-09-24 17:21:58,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:58" (1/1) ... [2020-09-24 17:21:58,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:58" (1/1) ... [2020-09-24 17:21:58,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:58" (1/1) ... [2020-09-24 17:21:58,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:58" (1/1) ... [2020-09-24 17:21:58,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:58" (1/1) ... [2020-09-24 17:21:58,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:21:58,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:21:58,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:21:58,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:21:58,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-24 17:21:58,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:21:58,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:21:58,927 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 17:21:58,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 17:21:58,928 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:21:58,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:21:58,928 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 17:21:58,928 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 17:21:58,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 17:21:58,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:21:58,929 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:21:58,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:21:58,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:21:59,282 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:21:59,283 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 17:21:59,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:21:59 BoogieIcfgContainer [2020-09-24 17:21:59,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:21:59,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:21:59,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:21:59,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:21:59,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:21:58" (1/3) ... [2020-09-24 17:21:59,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286c9910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:21:59, skipping insertion in model container [2020-09-24 17:21:59,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:58" (2/3) ... [2020-09-24 17:21:59,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286c9910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:21:59, skipping insertion in model container [2020-09-24 17:21:59,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:21:59" (3/3) ... [2020-09-24 17:21:59,299 INFO L109 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-09-24 17:21:59,311 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:21:59,321 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:21:59,345 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:21:59,378 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:21:59,379 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:21:59,379 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:21:59,379 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:21:59,379 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:21:59,379 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:21:59,380 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:21:59,380 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:21:59,403 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-09-24 17:21:59,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-24 17:21:59,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:21:59,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:21:59,415 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:21:59,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:21:59,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2127483765, now seen corresponding path program 1 times [2020-09-24 17:21:59,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:21:59,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826476102] [2020-09-24 17:21:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:21:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:59,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:59,743 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:59,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 17:21:59,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:59,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-09-24 17:21:59,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:59,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:21:59,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 17:21:59,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 17:21:59,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:21:59,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:21:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:59,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:59,900 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:59,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:21:59,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:59,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:21:59,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:59,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:21:59,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:59,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:21:59,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:21:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:21:59,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826476102] [2020-09-24 17:21:59,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:21:59,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:21:59,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820554415] [2020-09-24 17:21:59,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:21:59,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:21:59,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:21:59,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:21:59,946 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 5 states. [2020-09-24 17:22:00,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:00,092 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2020-09-24 17:22:00,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:22:00,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-24 17:22:00,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:00,107 INFO L225 Difference]: With dead ends: 89 [2020-09-24 17:22:00,108 INFO L226 Difference]: Without dead ends: 48 [2020-09-24 17:22:00,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:22:00,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-24 17:22:00,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-09-24 17:22:00,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-24 17:22:00,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-09-24 17:22:00,169 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 27 [2020-09-24 17:22:00,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:00,170 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-09-24 17:22:00,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:22:00,170 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-09-24 17:22:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 17:22:00,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:00,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:00,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:22:00,173 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:00,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:00,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1763359327, now seen corresponding path program 1 times [2020-09-24 17:22:00,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:00,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153145419] [2020-09-24 17:22:00,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:00,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:00,322 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:00,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 17:22:00,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:00,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-09-24 17:22:00,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:00,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:22:00,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-24 17:22:00,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 17:22:00,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:00,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:00,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:00,386 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:00,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:00,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:00,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:22:00,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:00,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:00,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:00,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:00,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:22:00,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153145419] [2020-09-24 17:22:00,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:22:00,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 17:22:00,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112668887] [2020-09-24 17:22:00,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:22:00,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:00,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:22:00,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:22:00,398 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 6 states. [2020-09-24 17:22:00,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:00,589 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2020-09-24 17:22:00,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 17:22:00,590 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-09-24 17:22:00,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:00,592 INFO L225 Difference]: With dead ends: 90 [2020-09-24 17:22:00,592 INFO L226 Difference]: Without dead ends: 88 [2020-09-24 17:22:00,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:22:00,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-24 17:22:00,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 59. [2020-09-24 17:22:00,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-24 17:22:00,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-09-24 17:22:00,611 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 29 [2020-09-24 17:22:00,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:00,612 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-09-24 17:22:00,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:22:00,612 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-09-24 17:22:00,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-24 17:22:00,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:00,614 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:00,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:22:00,614 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:00,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:00,615 INFO L82 PathProgramCache]: Analyzing trace with hash 2139784298, now seen corresponding path program 1 times [2020-09-24 17:22:00,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:00,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275596672] [2020-09-24 17:22:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:00,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:00,794 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:00,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 17:22:00,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:00,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-09-24 17:22:00,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:00,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:22:00,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 17:22:00,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 17:22:00,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:00,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:00,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:00,845 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:00,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:00,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:00,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:22:00,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:00,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:00,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:00,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:00,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:00,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 17:22:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:00,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:00,871 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:00,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:22:00,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:00,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 17:22:00,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:00,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:22:00,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:00,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:22:00,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:22:00,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275596672] [2020-09-24 17:22:00,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:22:00,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:22:00,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050400426] [2020-09-24 17:22:00,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:22:00,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:00,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:22:00,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:22:00,887 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 5 states. [2020-09-24 17:22:00,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:00,983 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2020-09-24 17:22:00,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:22:00,984 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-09-24 17:22:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:00,988 INFO L225 Difference]: With dead ends: 90 [2020-09-24 17:22:00,988 INFO L226 Difference]: Without dead ends: 88 [2020-09-24 17:22:00,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:22:00,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-24 17:22:01,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-09-24 17:22:01,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-24 17:22:01,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2020-09-24 17:22:01,005 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 32 [2020-09-24 17:22:01,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:01,006 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2020-09-24 17:22:01,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:22:01,006 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2020-09-24 17:22:01,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 17:22:01,008 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:01,008 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:01,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:22:01,009 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:01,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:01,009 INFO L82 PathProgramCache]: Analyzing trace with hash -268568898, now seen corresponding path program 1 times [2020-09-24 17:22:01,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:01,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266673588] [2020-09-24 17:22:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:01,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:01,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:01,666 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:01,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 17:22:01,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:22:01,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-09-24 17:22:01,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:22:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-24 17:22:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 17:22:01,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:01,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:01,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:01,768 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:01,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:01,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:01,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:22:01,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:01,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:01,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:01,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:01,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-24 17:22:01,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 17:22:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:01,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:01,804 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:01,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:22:01,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:01,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 17:22:01,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:01,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:22:01,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:01,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:22:01,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 17:22:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:22:01,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266673588] [2020-09-24 17:22:01,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:01,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 17:22:01,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364403350] [2020-09-24 17:22:01,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 17:22:01,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:01,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 17:22:01,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:22:01,826 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand 8 states. [2020-09-24 17:22:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:02,241 INFO L93 Difference]: Finished difference Result 146 states and 172 transitions. [2020-09-24 17:22:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 17:22:02,241 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-09-24 17:22:02,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:02,246 INFO L225 Difference]: With dead ends: 146 [2020-09-24 17:22:02,246 INFO L226 Difference]: Without dead ends: 144 [2020-09-24 17:22:02,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-24 17:22:02,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-24 17:22:02,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 93. [2020-09-24 17:22:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-24 17:22:02,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-09-24 17:22:02,283 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 38 [2020-09-24 17:22:02,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:02,285 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-09-24 17:22:02,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 17:22:02,286 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-09-24 17:22:02,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 17:22:02,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:02,290 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:02,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:22:02,291 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:02,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:02,291 INFO L82 PathProgramCache]: Analyzing trace with hash -360550748, now seen corresponding path program 1 times [2020-09-24 17:22:02,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:02,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493031884] [2020-09-24 17:22:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:02,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:02,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:02,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:02,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:02,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:03,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:03,333 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:03,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 17:22:03,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 17:22:03,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-09-24 17:22:03,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:03,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 17:22:03,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 17:22:03,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 17:22:03,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:22:03,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:03,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:03,463 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:03,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:03,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:03,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:22:03,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:03,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:03,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:03,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:03,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:22:03,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493031884] [2020-09-24 17:22:03,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:03,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 17:22:03,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790047206] [2020-09-24 17:22:03,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 17:22:03,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:03,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 17:22:03,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:22:03,471 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 11 states. [2020-09-24 17:22:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:04,116 INFO L93 Difference]: Finished difference Result 185 states and 226 transitions. [2020-09-24 17:22:04,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 17:22:04,116 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-09-24 17:22:04,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:04,120 INFO L225 Difference]: With dead ends: 185 [2020-09-24 17:22:04,120 INFO L226 Difference]: Without dead ends: 183 [2020-09-24 17:22:04,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2020-09-24 17:22:04,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-24 17:22:04,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 155. [2020-09-24 17:22:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-24 17:22:04,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 191 transitions. [2020-09-24 17:22:04,153 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 191 transitions. Word has length 38 [2020-09-24 17:22:04,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:04,154 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 191 transitions. [2020-09-24 17:22:04,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 17:22:04,154 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 191 transitions. [2020-09-24 17:22:04,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 17:22:04,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:04,156 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:04,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:22:04,157 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:04,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:04,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2102022651, now seen corresponding path program 1 times [2020-09-24 17:22:04,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:04,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380945713] [2020-09-24 17:22:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:04,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:04,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:04,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:04,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:04,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:04,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:04,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:04,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:04,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:05,998 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:05,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 17:22:05,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 17:22:05,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1833 [2020-09-24 17:22:05,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:05,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 17:22:05,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-24 17:22:06,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:22:06,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:06,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:06,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:06,025 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:06,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:06,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:06,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:22:06,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:06,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:06,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:06,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:06,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:06,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-24 17:22:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:06,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:06,034 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:06,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:22:06,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:06,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:22:06,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:06,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:06,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 17:22:06,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:06,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:22:06,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380945713] [2020-09-24 17:22:06,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:22:06,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:22:06,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776938917] [2020-09-24 17:22:06,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:22:06,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:06,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:22:06,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:22:06,043 INFO L87 Difference]: Start difference. First operand 155 states and 191 transitions. Second operand 4 states. [2020-09-24 17:22:06,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:06,123 INFO L93 Difference]: Finished difference Result 207 states and 252 transitions. [2020-09-24 17:22:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 17:22:06,124 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-24 17:22:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:06,126 INFO L225 Difference]: With dead ends: 207 [2020-09-24 17:22:06,126 INFO L226 Difference]: Without dead ends: 134 [2020-09-24 17:22:06,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:22:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-24 17:22:06,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 94. [2020-09-24 17:22:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-24 17:22:06,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2020-09-24 17:22:06,151 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 41 [2020-09-24 17:22:06,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:06,151 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2020-09-24 17:22:06,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:22:06,151 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2020-09-24 17:22:06,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 17:22:06,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:06,161 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:06,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:22:06,161 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:06,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:06,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1447898534, now seen corresponding path program 1 times [2020-09-24 17:22:06,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:06,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119772508] [2020-09-24 17:22:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:06,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:06,323 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:06,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 17:22:06,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:06,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-09-24 17:22:06,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:06,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:22:06,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-24 17:22:06,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 17:22:06,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:06,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:06,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:06,391 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:06,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:06,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:06,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:22:06,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:06,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:06,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:06,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:06,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:22:06,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 17:22:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:06,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:06,405 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:06,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:22:06,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:06,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 17:22:06,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:06,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:22:06,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:06,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:22:06,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:06,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 17:22:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:06,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:06,422 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:06,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:22:06,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:06,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 17:22:06,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:06,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:22:06,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:06,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:22:06,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 17:22:06,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119772508] [2020-09-24 17:22:06,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:06,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 17:22:06,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264103089] [2020-09-24 17:22:06,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 17:22:06,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:06,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 17:22:06,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:22:06,435 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand 8 states. [2020-09-24 17:22:06,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:06,648 INFO L93 Difference]: Finished difference Result 152 states and 179 transitions. [2020-09-24 17:22:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 17:22:06,650 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-09-24 17:22:06,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:06,654 INFO L225 Difference]: With dead ends: 152 [2020-09-24 17:22:06,655 INFO L226 Difference]: Without dead ends: 150 [2020-09-24 17:22:06,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:22:06,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-24 17:22:06,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 125. [2020-09-24 17:22:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-24 17:22:06,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2020-09-24 17:22:06,681 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 46 [2020-09-24 17:22:06,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:06,682 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2020-09-24 17:22:06,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 17:22:06,682 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2020-09-24 17:22:06,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 17:22:06,685 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:06,685 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:06,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 17:22:06,685 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:06,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:06,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1446982975, now seen corresponding path program 2 times [2020-09-24 17:22:06,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:06,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856895934] [2020-09-24 17:22:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:06,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:06,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:06,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:08,796 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:08,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 17:22:08,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:22:08,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2088 [2020-09-24 17:22:08,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:08,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 17:22:08,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-09-24 17:22:08,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 17:22:08,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:08,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:08,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:08,867 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:08,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:08,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:08,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:22:08,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:08,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:08,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:08,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:08,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:08,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 17:22:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:08,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:08,880 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:08,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:22:08,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:08,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:22:08,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:08,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:22:08,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:08,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:22:08,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:08,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 17:22:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:08,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:08,915 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:08,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:22:08,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:08,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:22:08,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:08,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:22:08,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:08,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:22:08,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 17:22:08,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856895934] [2020-09-24 17:22:08,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:08,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 17:22:08,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553010027] [2020-09-24 17:22:08,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 17:22:08,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:08,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 17:22:08,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:22:08,926 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand 11 states. [2020-09-24 17:22:09,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:09,236 INFO L93 Difference]: Finished difference Result 183 states and 218 transitions. [2020-09-24 17:22:09,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 17:22:09,237 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-09-24 17:22:09,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:09,239 INFO L225 Difference]: With dead ends: 183 [2020-09-24 17:22:09,239 INFO L226 Difference]: Without dead ends: 181 [2020-09-24 17:22:09,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-24 17:22:09,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-24 17:22:09,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 130. [2020-09-24 17:22:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-24 17:22:09,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 151 transitions. [2020-09-24 17:22:09,254 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 151 transitions. Word has length 47 [2020-09-24 17:22:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:09,255 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 151 transitions. [2020-09-24 17:22:09,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 17:22:09,255 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 151 transitions. [2020-09-24 17:22:09,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-24 17:22:09,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:09,257 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:09,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 17:22:09,257 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:09,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:09,258 INFO L82 PathProgramCache]: Analyzing trace with hash 87970788, now seen corresponding path program 1 times [2020-09-24 17:22:09,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:09,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458328206] [2020-09-24 17:22:09,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:09,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:09,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:09,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:09,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:09,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:10,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:11,822 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:11,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-24 17:22:11,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 17:22:11,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2554 [2020-09-24 17:22:11,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:11,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 17:22:11,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 17:22:11,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 17:22:11,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:22:11,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:11,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:11,938 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:11,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:11,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:11,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:22:11,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:11,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:11,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:11,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:11,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:11,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 17:22:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:11,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:11,951 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:11,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:22:11,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:11,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:22:11,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:11,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:22:11,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:11,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:22:11,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:22:11,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-24 17:22:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:11,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:11,979 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:11,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:22:11,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:11,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 17:22:11,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:11,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:22:11,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:11,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:22:11,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 17:22:11,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458328206] [2020-09-24 17:22:11,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:11,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 17:22:11,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105978002] [2020-09-24 17:22:11,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 17:22:11,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:11,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 17:22:11,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:22:11,993 INFO L87 Difference]: Start difference. First operand 130 states and 151 transitions. Second operand 10 states. [2020-09-24 17:22:12,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:12,331 INFO L93 Difference]: Finished difference Result 316 states and 383 transitions. [2020-09-24 17:22:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 17:22:12,332 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-09-24 17:22:12,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:12,336 INFO L225 Difference]: With dead ends: 316 [2020-09-24 17:22:12,336 INFO L226 Difference]: Without dead ends: 203 [2020-09-24 17:22:12,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-09-24 17:22:12,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-24 17:22:12,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 103. [2020-09-24 17:22:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-24 17:22:12,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-09-24 17:22:12,361 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 50 [2020-09-24 17:22:12,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:12,362 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-09-24 17:22:12,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 17:22:12,362 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-09-24 17:22:12,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 17:22:12,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:22:12,364 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:22:12,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 17:22:12,365 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:22:12,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:22:12,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1080348991, now seen corresponding path program 2 times [2020-09-24 17:22:12,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:22:12,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959177127] [2020-09-24 17:22:12,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:22:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:12,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:12,571 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:12,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 17:22:12,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:12,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-09-24 17:22:12,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:12,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 17:22:12,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-24 17:22:12,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 17:22:12,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:12,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:22:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:12,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:12,660 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:12,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:22:12,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:12,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:22:12,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:12,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:22:12,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:12,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:22:12,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:12,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 17:22:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:12,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:12,673 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:12,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:22:12,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:12,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:22:12,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:12,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:22:12,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:12,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:22:12,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:12,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 17:22:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:12,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:12,686 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:12,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:22:12,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:12,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:22:12,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:12,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:22:12,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:12,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:22:12,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:12,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-24 17:22:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:12,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:12,701 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:12,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:22:12,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:12,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:22:12,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:22:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:22:12,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:12,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 17:22:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:22:12,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:22:12,716 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:22:12,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:22:12,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:22:12,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 17:22:12,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:22:12,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:22:12,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:22:12,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:22:12,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:22:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-24 17:22:12,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959177127] [2020-09-24 17:22:12,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:22:12,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 17:22:12,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427302257] [2020-09-24 17:22:12,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 17:22:12,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:22:12,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 17:22:12,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:22:12,730 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 10 states. [2020-09-24 17:22:13,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:22:13,047 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2020-09-24 17:22:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 17:22:13,047 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-09-24 17:22:13,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:22:13,048 INFO L225 Difference]: With dead ends: 119 [2020-09-24 17:22:13,048 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 17:22:13,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-24 17:22:13,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 17:22:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 17:22:13,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 17:22:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 17:22:13,052 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2020-09-24 17:22:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:22:13,052 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 17:22:13,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 17:22:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 17:22:13,053 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 17:22:13,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 17:22:13,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 17:22:13,192 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 25 [2020-09-24 17:22:13,897 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 17:22:13,897 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 17:22:13,897 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 17:22:13,897 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 17:22:13,897 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 17:22:13,898 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 17:22:13,898 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-24 17:22:13,898 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-24 17:22:13,898 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-24 17:22:13,898 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-24 17:22:13,898 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-24 17:22:13,898 INFO L268 CegarLoopResult]: For program point L31(lines 23 33) no Hoare annotation was computed. [2020-09-24 17:22:13,899 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 37) no Hoare annotation was computed. [2020-09-24 17:22:13,899 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-09-24 17:22:13,899 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-09-24 17:22:13,899 INFO L268 CegarLoopResult]: For program point L23-4(line 23) no Hoare annotation was computed. [2020-09-24 17:22:13,900 INFO L264 CegarLoopResult]: At program point L23-5(lines 23 33) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 main_~k~0)) (.cse1 (<= main_~k~0 main_~n~0))) (or (and .cse0 .cse1 (= (* main_~i~0 2) main_~j~0)) (and (<= (+ (* 2 main_~i~0) 1) main_~j~0) .cse0 .cse1))) [2020-09-24 17:22:13,901 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-24 17:22:13,901 INFO L268 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-09-24 17:22:13,902 INFO L268 CegarLoopResult]: For program point L15-2(line 15) no Hoare annotation was computed. [2020-09-24 17:22:13,902 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-09-24 17:22:13,902 INFO L268 CegarLoopResult]: For program point L24-1(lines 24 32) no Hoare annotation was computed. [2020-09-24 17:22:13,902 INFO L268 CegarLoopResult]: For program point L24-2(line 24) no Hoare annotation was computed. [2020-09-24 17:22:13,902 INFO L268 CegarLoopResult]: For program point L24-3(line 24) no Hoare annotation was computed. [2020-09-24 17:22:13,902 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-24 17:22:13,902 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-24 17:22:13,903 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-24 17:22:13,903 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-09-24 17:22:13,903 INFO L268 CegarLoopResult]: For program point L25-3(line 25) no Hoare annotation was computed. [2020-09-24 17:22:13,903 INFO L268 CegarLoopResult]: For program point L25-4(line 25) no Hoare annotation was computed. [2020-09-24 17:22:13,903 INFO L264 CegarLoopResult]: At program point L25-5(lines 25 27) the Hoare annotation is: (let ((.cse0 (* main_~i~0 2)) (.cse3 (+ (* 2 main_~i~0) 1))) (let ((.cse1 (<= (+ main_~j~0 1) main_~n~0)) (.cse4 (<= .cse3 main_~k~0)) (.cse5 (<= main_~k~0 main_~n~0)) (.cse2 (= .cse0 main_~j~0))) (or (and (= .cse0 main_~k~0) .cse1 .cse2) (and (<= .cse3 main_~j~0) .cse1 .cse4 .cse5) (and .cse4 .cse5 .cse2)))) [2020-09-24 17:22:13,904 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-24 17:22:13,904 INFO L268 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2020-09-24 17:22:13,904 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 37) no Hoare annotation was computed. [2020-09-24 17:22:13,904 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 main_~k~0)) (.cse1 (<= (+ main_~j~0 1) main_~n~0)) (.cse2 (<= main_~k~0 main_~n~0))) (or (and .cse0 .cse1 .cse2 (= (* main_~i~0 2) main_~j~0)) (and (<= (+ (* 2 main_~i~0) 1) main_~j~0) .cse0 .cse1 .cse2))) [2020-09-24 17:22:13,904 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 37) the Hoare annotation is: true [2020-09-24 17:22:13,905 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 main_~k~0)) (.cse1 (<= (+ main_~j~0 1) main_~n~0)) (.cse2 (<= main_~k~0 main_~n~0))) (or (and .cse0 .cse1 .cse2 (= (* main_~i~0 2) main_~j~0)) (and (<= (+ (* 2 main_~i~0) 1) main_~j~0) .cse0 .cse1 .cse2))) [2020-09-24 17:22:13,905 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (let ((.cse4 (* main_~i~0 2)) (.cse1 (+ (* 2 main_~i~0) 1))) (let ((.cse2 (<= (+ main_~j~0 1) main_~n~0)) (.cse0 (<= (+ main_~k~0 1) main_~n~0)) (.cse3 (<= .cse1 main_~k~0)) (.cse5 (= .cse4 main_~j~0))) (or (and .cse0 (<= .cse1 main_~j~0) .cse2 .cse3) (and (= .cse4 main_~k~0) .cse2 .cse5) (and .cse0 .cse3 .cse5)))) [2020-09-24 17:22:13,906 INFO L268 CegarLoopResult]: For program point L26-1(lines 25 27) no Hoare annotation was computed. [2020-09-24 17:22:13,906 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 34) no Hoare annotation was computed. [2020-09-24 17:22:13,906 INFO L268 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-09-24 17:22:13,906 INFO L268 CegarLoopResult]: For program point L18(lines 18 21) no Hoare annotation was computed. [2020-09-24 17:22:13,906 INFO L268 CegarLoopResult]: For program point L22-4(line 22) no Hoare annotation was computed. [2020-09-24 17:22:13,906 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 21) no Hoare annotation was computed. [2020-09-24 17:22:13,906 INFO L264 CegarLoopResult]: At program point L22-5(lines 22 34) the Hoare annotation is: (and (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-09-24 17:22:13,906 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-24 17:22:13,907 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-09-24 17:22:13,907 INFO L268 CegarLoopResult]: For program point L14-2(line 14) no Hoare annotation was computed. [2020-09-24 17:22:13,907 INFO L271 CegarLoopResult]: At program point L35(lines 13 37) the Hoare annotation is: true [2020-09-24 17:22:13,907 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-24 17:22:13,907 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-24 17:22:13,907 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-24 17:22:13,908 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-24 17:22:13,908 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-24 17:22:13,908 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-24 17:22:13,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 05:22:13 BoogieIcfgContainer [2020-09-24 17:22:13,941 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 17:22:13,944 INFO L168 Benchmark]: Toolchain (without parser) took 15540.43 ms. Allocated memory was 141.6 MB in the beginning and 321.4 MB in the end (delta: 179.8 MB). Free memory was 104.1 MB in the beginning and 251.5 MB in the end (delta: -147.4 MB). Peak memory consumption was 163.2 MB. Max. memory is 7.1 GB. [2020-09-24 17:22:13,946 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.4 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-09-24 17:22:13,947 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.05 ms. Allocated memory is still 141.6 MB. Free memory was 103.2 MB in the beginning and 93.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-24 17:22:13,950 INFO L168 Benchmark]: Boogie Preprocessor took 128.67 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 184.7 MB in the end (delta: -91.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-24 17:22:13,954 INFO L168 Benchmark]: RCFGBuilder took 440.11 ms. Allocated memory is still 205.0 MB. Free memory was 184.7 MB in the beginning and 168.1 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-09-24 17:22:13,954 INFO L168 Benchmark]: TraceAbstraction took 14651.57 ms. Allocated memory was 205.0 MB in the beginning and 321.4 MB in the end (delta: 116.4 MB). Free memory was 168.1 MB in the beginning and 251.5 MB in the end (delta: -83.4 MB). Peak memory consumption was 163.8 MB. Max. memory is 7.1 GB. [2020-09-24 17:22:13,964 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.4 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 310.05 ms. Allocated memory is still 141.6 MB. Free memory was 103.2 MB in the beginning and 93.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.67 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 184.7 MB in the end (delta: -91.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 440.11 ms. Allocated memory is still 205.0 MB. Free memory was 184.7 MB in the beginning and 168.1 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14651.57 ms. Allocated memory was 205.0 MB in the beginning and 321.4 MB in the end (delta: 116.4 MB). Free memory was 168.1 MB in the beginning and 251.5 MB in the end (delta: -83.4 MB). Peak memory consumption was 163.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: n <= k && k <= n - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((n <= k && k <= n) && i * 2 == j) || ((2 * i + 1 <= j && n <= k) && k <= n) - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (((i * 2 == k && j + 1 <= n) && i * 2 == j) || (((2 * i + 1 <= j && j + 1 <= n) && 2 * i + 1 <= k) && k <= n)) || ((2 * i + 1 <= k && k <= n) && i * 2 == j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.6s, OverallIterations: 10, TraceHistogramMax: 5, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 596 SDtfs, 421 SDslu, 2602 SDs, 0 SdLazy, 1452 SolverSat, 112 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 172 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=155occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 328 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 50 PreInvPairs, 78 NumberOfFragments, 230 HoareAnnotationTreeSize, 50 FomulaSimplifications, 19817 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 12 FomulaSimplificationsInter, 766 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 10.1s InterpolantComputationTime, 411 NumberOfCodeBlocks, 411 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 401 ConstructedInterpolants, 0 QuantifiedInterpolants, 45615 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 74/104 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...