/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:41:53,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:41:53,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:41:53,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:41:53,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:41:53,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:41:53,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:41:53,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:41:53,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:41:53,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:41:53,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:41:53,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:41:53,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:41:53,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:41:53,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:41:53,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:41:53,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:41:53,712 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:41:53,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:41:53,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:41:53,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:41:53,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:41:53,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:41:53,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:41:53,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:41:53,725 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:41:53,725 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:41:53,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:41:53,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:41:53,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:41:53,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:41:53,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:41:53,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:41:53,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:41:53,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:41:53,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:41:53,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:41:53,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:41:53,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:41:53,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:41:53,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:41:53,740 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 20:41:53,796 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:41:53,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:41:53,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:41:53,800 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:41:53,800 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:41:53,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:41:53,801 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:41:53,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:41:53,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:41:53,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:41:53,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:41:53,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:41:53,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:41:53,803 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:41:53,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:41:53,804 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:41:53,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:41:53,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:41:53,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:41:53,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:41:53,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:41:53,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:41:53,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:41:53,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:41:53,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:41:53,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:41:53,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:41:53,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:41:53,807 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:41:53,807 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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-09-24 20:41:54,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:41:54,329 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:41:54,335 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:41:54,338 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:41:54,339 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:41:54,340 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-09-24 20:41:54,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3b7305f66/d8c544e04240413cb33ff9879519729a/FLAG565aecd46 [2020-09-24 20:41:55,051 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:41:55,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-09-24 20:41:55,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3b7305f66/d8c544e04240413cb33ff9879519729a/FLAG565aecd46 [2020-09-24 20:41:55,414 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3b7305f66/d8c544e04240413cb33ff9879519729a [2020-09-24 20:41:55,429 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:41:55,435 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:41:55,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:41:55,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:41:55,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:41:55,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:41:55" (1/1) ... [2020-09-24 20:41:55,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180772d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:55, skipping insertion in model container [2020-09-24 20:41:55,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:41:55" (1/1) ... [2020-09-24 20:41:55,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:41:55,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:41:55,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:41:55,712 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:41:55,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:41:55,746 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:41:55,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:55 WrapperNode [2020-09-24 20:41:55,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:41:55,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:41:55,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:41:55,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:41:55,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:55" (1/1) ... [2020-09-24 20:41:55,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:55" (1/1) ... [2020-09-24 20:41:55,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:55" (1/1) ... [2020-09-24 20:41:55,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:55" (1/1) ... [2020-09-24 20:41:55,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:55" (1/1) ... [2020-09-24 20:41:55,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:55" (1/1) ... [2020-09-24 20:41:55,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:55" (1/1) ... [2020-09-24 20:41:55,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:41:55,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:41:55,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:41:55,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:41:55,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:55" (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 20:41:55,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:41:55,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:41:55,961 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 20:41:55,961 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:41:55,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:41:55,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 20:41:55,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 20:41:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:41:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:41:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:41:56,175 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:41:56,176 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 20:41:56,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:41:56 BoogieIcfgContainer [2020-09-24 20:41:56,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:41:56,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:41:56,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:41:56,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:41:56,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:41:55" (1/3) ... [2020-09-24 20:41:56,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f686fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:41:56, skipping insertion in model container [2020-09-24 20:41:56,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:55" (2/3) ... [2020-09-24 20:41:56,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f686fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:41:56, skipping insertion in model container [2020-09-24 20:41:56,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:41:56" (3/3) ... [2020-09-24 20:41:56,193 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-09-24 20:41:56,212 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:41:56,223 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:41:56,253 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:41:56,293 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:41:56,294 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:41:56,294 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:41:56,294 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:41:56,294 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:41:56,295 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:41:56,295 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:41:56,295 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:41:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-24 20:41:56,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 20:41:56,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:56,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:56,334 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:56,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:56,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1882057920, now seen corresponding path program 1 times [2020-09-24 20:41:56,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:56,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186023336] [2020-09-24 20:41:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:56,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:56,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:56,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:56,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 20:41:56,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:41:56,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-09-24 20:41:56,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:56,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:41:56,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 20:41:56,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 20:41:56,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:41:56,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:56,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:56,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:56,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:41:56,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:56,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 20:41:56,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:56,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:56,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:56,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:56,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:56,770 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 20:41:56,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186023336] [2020-09-24 20:41:56,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:41:56,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:41:56,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338120460] [2020-09-24 20:41:56,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:41:56,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:56,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:41:56,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:41:56,805 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2020-09-24 20:41:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:56,903 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-09-24 20:41:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 20:41:56,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-24 20:41:56,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:56,916 INFO L225 Difference]: With dead ends: 50 [2020-09-24 20:41:56,916 INFO L226 Difference]: Without dead ends: 26 [2020-09-24 20:41:56,921 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 20:41:56,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-24 20:41:56,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-24 20:41:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-24 20:41:56,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-24 20:41:56,965 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2020-09-24 20:41:56,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:56,965 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-24 20:41:56,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:41:56,965 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-24 20:41:56,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 20:41:56,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:56,967 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] [2020-09-24 20:41:56,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:41:56,968 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:56,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:56,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1535432394, now seen corresponding path program 1 times [2020-09-24 20:41:56,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:56,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134843468] [2020-09-24 20:41:56,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:57,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:57,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:57,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 20:41:57,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:57,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-09-24 20:41:57,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:57,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:41:57,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 20:41:57,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 20:41:57,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:57,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:57,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:57,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:57,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:41:57,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:57,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:41:57,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:57,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:57,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:57,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:57,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:41:57,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134843468] [2020-09-24 20:41:57,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:57,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 20:41:57,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256790534] [2020-09-24 20:41:57,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 20:41:57,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:57,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 20:41:57,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:41:57,623 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-09-24 20:41:57,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:57,856 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-09-24 20:41:57,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 20:41:57,857 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-24 20:41:57,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:57,858 INFO L225 Difference]: With dead ends: 48 [2020-09-24 20:41:57,859 INFO L226 Difference]: Without dead ends: 29 [2020-09-24 20:41:57,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:41:57,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-24 20:41:57,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-24 20:41:57,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 20:41:57,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-24 20:41:57,868 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-09-24 20:41:57,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:57,868 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-24 20:41:57,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 20:41:57,868 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-24 20:41:57,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-24 20:41:57,869 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:57,870 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:57,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:41:57,870 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:57,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:57,871 INFO L82 PathProgramCache]: Analyzing trace with hash -927596731, now seen corresponding path program 1 times [2020-09-24 20:41:57,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:57,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435541467] [2020-09-24 20:41:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:57,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:57,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:57,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 20:41:57,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:57,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-24 20:41:57,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:57,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:41:57,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 20:41:57,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 20:41:57,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:58,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:58,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:58,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:58,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:41:58,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:58,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:41:58,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:58,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:58,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:58,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:58,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:41:58,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435541467] [2020-09-24 20:41:58,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:58,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 20:41:58,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386193471] [2020-09-24 20:41:58,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:41:58,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:58,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:41:58,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:41:58,012 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-24 20:41:58,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:58,069 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-09-24 20:41:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 20:41:58,070 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-24 20:41:58,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:58,071 INFO L225 Difference]: With dead ends: 42 [2020-09-24 20:41:58,071 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 20:41:58,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 20:41:58,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 20:41:58,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-24 20:41:58,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 20:41:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-24 20:41:58,078 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-09-24 20:41:58,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:58,079 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-24 20:41:58,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:41:58,079 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-24 20:41:58,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 20:41:58,080 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:58,080 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:58,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:41:58,081 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:58,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:58,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1778100254, now seen corresponding path program 2 times [2020-09-24 20:41:58,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:58,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027401981] [2020-09-24 20:41:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:58,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:58,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:58,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 20:41:58,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:58,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-09-24 20:41:58,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:58,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 20:41:58,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 20:41:58,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 20:41:58,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:58,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:58,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:58,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:58,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:41:58,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:58,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:41:58,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:58,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:58,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:58,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:58,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:41:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:41:58,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027401981] [2020-09-24 20:41:58,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:58,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 20:41:58,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642036119] [2020-09-24 20:41:58,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 20:41:58,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:58,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 20:41:58,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-24 20:41:58,590 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-24 20:41:59,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:59,045 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-24 20:41:59,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 20:41:59,046 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-24 20:41:59,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:59,047 INFO L225 Difference]: With dead ends: 42 [2020-09-24 20:41:59,048 INFO L226 Difference]: Without dead ends: 37 [2020-09-24 20:41:59,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-24 20:41:59,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-24 20:41:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-09-24 20:41:59,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-24 20:41:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-24 20:41:59,055 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2020-09-24 20:41:59,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:59,055 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-24 20:41:59,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 20:41:59,055 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-24 20:41:59,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 20:41:59,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:59,057 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:59,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:41:59,057 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:59,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:59,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1884066515, now seen corresponding path program 2 times [2020-09-24 20:41:59,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:59,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917191299] [2020-09-24 20:41:59,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:59,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:59,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:59,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 20:41:59,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:59,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-09-24 20:41:59,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:59,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:41:59,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 20:41:59,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 20:41:59,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:59,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:41:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:59,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:59,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:59,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:41:59,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:59,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:41:59,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:59,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:41:59,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:41:59,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:41:59,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:41:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:41:59,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917191299] [2020-09-24 20:41:59,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:41:59,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 20:41:59,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51510736] [2020-09-24 20:41:59,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 20:41:59,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:41:59,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 20:41:59,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 20:41:59,260 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-09-24 20:41:59,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:41:59,345 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-09-24 20:41:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 20:41:59,347 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-09-24 20:41:59,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:41:59,348 INFO L225 Difference]: With dead ends: 48 [2020-09-24 20:41:59,348 INFO L226 Difference]: Without dead ends: 37 [2020-09-24 20:41:59,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:41:59,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-24 20:41:59,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-09-24 20:41:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-24 20:41:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-24 20:41:59,359 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-09-24 20:41:59,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:41:59,359 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-24 20:41:59,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 20:41:59,359 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-24 20:41:59,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-24 20:41:59,360 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:41:59,360 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:41:59,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 20:41:59,362 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:41:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:41:59,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1363892486, now seen corresponding path program 3 times [2020-09-24 20:41:59,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:41:59,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389231499] [2020-09-24 20:41:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:41:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:41:59,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:41:59,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:41:59,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-24 20:41:59,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:41:59,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-09-24 20:41:59,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:41:59,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 20:41:59,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 20:41:59,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 20:41:59,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:00,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:00,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:00,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:00,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:00,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:00,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:42:00,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:00,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:00,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:00,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:00,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 20:42:00,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389231499] [2020-09-24 20:42:00,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:00,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 20:42:00,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298194493] [2020-09-24 20:42:00,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 20:42:00,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:00,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 20:42:00,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-24 20:42:00,091 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-09-24 20:42:00,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:00,473 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-09-24 20:42:00,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 20:42:00,474 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-09-24 20:42:00,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:00,475 INFO L225 Difference]: With dead ends: 47 [2020-09-24 20:42:00,475 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 20:42:00,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-24 20:42:00,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 20:42:00,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-24 20:42:00,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-24 20:42:00,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-24 20:42:00,494 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2020-09-24 20:42:00,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:00,496 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-24 20:42:00,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 20:42:00,496 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-24 20:42:00,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 20:42:00,497 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:00,497 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:00,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 20:42:00,497 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:00,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:00,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1557187861, now seen corresponding path program 3 times [2020-09-24 20:42:00,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:00,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412563469] [2020-09-24 20:42:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:00,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:00,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:00,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 20:42:00,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:00,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-09-24 20:42:00,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:00,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:42:00,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 20:42:00,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 20:42:00,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:00,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:00,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:00,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:00,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:00,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:00,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 20:42:00,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:00,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:00,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:00,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:00,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:00,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412563469] [2020-09-24 20:42:00,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:00,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 20:42:00,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290177588] [2020-09-24 20:42:00,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 20:42:00,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:00,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 20:42:00,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:42:00,780 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-09-24 20:42:00,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:00,899 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-24 20:42:00,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 20:42:00,900 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-09-24 20:42:00,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:00,901 INFO L225 Difference]: With dead ends: 60 [2020-09-24 20:42:00,901 INFO L226 Difference]: Without dead ends: 49 [2020-09-24 20:42:00,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:42:00,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-24 20:42:00,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-24 20:42:00,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-24 20:42:00,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-09-24 20:42:00,912 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 37 [2020-09-24 20:42:00,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:00,912 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-09-24 20:42:00,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 20:42:00,913 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-09-24 20:42:00,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 20:42:00,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:00,914 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:00,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 20:42:00,915 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:00,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2133811459, now seen corresponding path program 4 times [2020-09-24 20:42:00,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:00,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587723192] [2020-09-24 20:42:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:00,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:01,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:01,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 20:42:01,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:01,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-09-24 20:42:01,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:01,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:42:01,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 20:42:01,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 20:42:01,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:01,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:01,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:01,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:01,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:01,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:01,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:42:01,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:01,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:01,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:01,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:01,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:01,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587723192] [2020-09-24 20:42:01,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:01,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 20:42:01,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172611743] [2020-09-24 20:42:01,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 20:42:01,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:01,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 20:42:01,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:42:01,239 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2020-09-24 20:42:01,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:01,390 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-09-24 20:42:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 20:42:01,390 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-09-24 20:42:01,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:01,392 INFO L225 Difference]: With dead ends: 66 [2020-09-24 20:42:01,392 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 20:42:01,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-24 20:42:01,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 20:42:01,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-24 20:42:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 20:42:01,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-09-24 20:42:01,399 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-09-24 20:42:01,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:01,399 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-09-24 20:42:01,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 20:42:01,399 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-09-24 20:42:01,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 20:42:01,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:01,400 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:01,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 20:42:01,401 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:01,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:01,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1351967461, now seen corresponding path program 5 times [2020-09-24 20:42:01,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:01,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009066965] [2020-09-24 20:42:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:01,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:01,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:01,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 20:42:01,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:01,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-09-24 20:42:01,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:01,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 20:42:01,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 20:42:01,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 20:42:01,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:01,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:01,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:01,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:01,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:01,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:01,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:42:01,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:01,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:01,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:01,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:01,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:01,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009066965] [2020-09-24 20:42:01,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:01,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 20:42:01,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460918915] [2020-09-24 20:42:01,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 20:42:01,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:01,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 20:42:01,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-24 20:42:01,811 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 13 states. [2020-09-24 20:42:01,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:01,994 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-09-24 20:42:01,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 20:42:01,995 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-09-24 20:42:01,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:01,996 INFO L225 Difference]: With dead ends: 72 [2020-09-24 20:42:01,996 INFO L226 Difference]: Without dead ends: 61 [2020-09-24 20:42:01,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-24 20:42:01,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-24 20:42:02,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-09-24 20:42:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-24 20:42:02,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-24 20:42:02,003 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-09-24 20:42:02,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:02,004 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-24 20:42:02,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 20:42:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-24 20:42:02,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 20:42:02,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:02,005 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:02,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 20:42:02,006 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:02,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1927178035, now seen corresponding path program 6 times [2020-09-24 20:42:02,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:02,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307710094] [2020-09-24 20:42:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:02,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:02,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:02,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 20:42:02,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:02,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-09-24 20:42:02,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:02,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 20:42:02,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 20:42:02,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 20:42:02,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:02,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:02,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:02,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:02,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:02,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:02,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:42:02,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:02,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:02,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:02,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:02,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:02,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307710094] [2020-09-24 20:42:02,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:02,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 20:42:02,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125205221] [2020-09-24 20:42:02,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 20:42:02,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:02,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 20:42:02,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:42:02,608 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-09-24 20:42:02,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:02,856 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-09-24 20:42:02,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 20:42:02,856 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-09-24 20:42:02,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:02,857 INFO L225 Difference]: With dead ends: 78 [2020-09-24 20:42:02,857 INFO L226 Difference]: Without dead ends: 67 [2020-09-24 20:42:02,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-24 20:42:02,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-24 20:42:02,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-09-24 20:42:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 20:42:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-24 20:42:02,870 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-09-24 20:42:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:02,870 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-24 20:42:02,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 20:42:02,870 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-24 20:42:02,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 20:42:02,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:02,874 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:02,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 20:42:02,874 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:02,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:02,875 INFO L82 PathProgramCache]: Analyzing trace with hash -879247179, now seen corresponding path program 7 times [2020-09-24 20:42:02,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:02,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031803207] [2020-09-24 20:42:02,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:02,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:03,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:03,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-24 20:42:03,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:03,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-09-24 20:42:03,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:03,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 20:42:03,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 20:42:03,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-24 20:42:03,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:03,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:03,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:03,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:03,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:03,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:03,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:42:03,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:03,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:03,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:03,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:03,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 29 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:03,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031803207] [2020-09-24 20:42:03,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:03,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 20:42:03,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079491156] [2020-09-24 20:42:03,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 20:42:03,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:03,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 20:42:03,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-24 20:42:03,529 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-09-24 20:42:03,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:03,829 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-09-24 20:42:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 20:42:03,830 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-09-24 20:42:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:03,831 INFO L225 Difference]: With dead ends: 84 [2020-09-24 20:42:03,831 INFO L226 Difference]: Without dead ends: 73 [2020-09-24 20:42:03,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-24 20:42:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-24 20:42:03,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-09-24 20:42:03,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-24 20:42:03,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-09-24 20:42:03,838 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2020-09-24 20:42:03,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:03,839 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-09-24 20:42:03,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 20:42:03,839 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-09-24 20:42:03,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 20:42:03,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:03,840 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:03,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 20:42:03,841 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:03,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:03,841 INFO L82 PathProgramCache]: Analyzing trace with hash -583378275, now seen corresponding path program 8 times [2020-09-24 20:42:03,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:03,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755684290] [2020-09-24 20:42:03,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:03,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:04,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:04,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 20:42:04,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:04,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-09-24 20:42:04,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:04,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 20:42:04,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 20:42:04,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 20:42:04,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:04,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:04,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:04,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:04,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:04,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:04,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:42:04,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:04,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:04,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:04,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 33 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:04,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755684290] [2020-09-24 20:42:04,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:04,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 20:42:04,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968413698] [2020-09-24 20:42:04,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 20:42:04,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:04,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 20:42:04,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-24 20:42:04,639 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 19 states. [2020-09-24 20:42:05,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:05,057 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-09-24 20:42:05,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 20:42:05,058 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-09-24 20:42:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:05,059 INFO L225 Difference]: With dead ends: 89 [2020-09-24 20:42:05,060 INFO L226 Difference]: Without dead ends: 78 [2020-09-24 20:42:05,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 20:42:05,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-24 20:42:05,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-09-24 20:42:05,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-24 20:42:05,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-24 20:42:05,072 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-09-24 20:42:05,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:05,072 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-24 20:42:05,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 20:42:05,073 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-24 20:42:05,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 20:42:05,074 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:05,074 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:05,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 20:42:05,075 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:05,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:05,075 INFO L82 PathProgramCache]: Analyzing trace with hash 929818245, now seen corresponding path program 9 times [2020-09-24 20:42:05,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:05,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892399715] [2020-09-24 20:42:05,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 20:42:05,095 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 20:42:05,096 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 20:42:05,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 20:42:05,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:42:05 BoogieIcfgContainer [2020-09-24 20:42:05,128 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:42:05,133 INFO L168 Benchmark]: Toolchain (without parser) took 9700.35 ms. Allocated memory was 140.0 MB in the beginning and 303.0 MB in the end (delta: 163.1 MB). Free memory was 103.6 MB in the beginning and 257.3 MB in the end (delta: -153.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:05,134 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-24 20:42:05,135 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.34 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 93.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:05,135 INFO L168 Benchmark]: Boogie Preprocessor took 117.98 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.7 MB in the beginning and 182.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:05,140 INFO L168 Benchmark]: RCFGBuilder took 315.15 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 170.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:05,141 INFO L168 Benchmark]: TraceAbstraction took 8945.67 ms. Allocated memory was 202.9 MB in the beginning and 303.0 MB in the end (delta: 100.1 MB). Free memory was 169.5 MB in the beginning and 257.3 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:05,144 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 311.34 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 93.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.98 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.7 MB in the beginning and 182.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.15 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 170.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8945.67 ms. Allocated memory was 202.9 MB in the beginning and 303.0 MB in the end (delta: 100.1 MB). Free memory was 169.5 MB in the beginning and 257.3 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.8s, OverallIterations: 13, TraceHistogramMax: 10, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 200 SDtfs, 192 SDslu, 1453 SDs, 0 SdLazy, 865 SolverSat, 72 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 262 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 32 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 533 NumberOfCodeBlocks, 533 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 448 ConstructedInterpolants, 0 QuantifiedInterpolants, 60454 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 1 PerfectInterpolantSequences, 160/758 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 incorrect! Received shutdown request...