/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 --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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-crafted-1/sumt7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:37:01,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:37:01,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:37:01,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:37:01,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:37:01,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:37:01,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:37:01,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:37:01,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:37:01,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:37:01,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:37:01,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:37:01,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:37:01,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:37:01,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:37:01,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:37:01,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:37:01,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:37:01,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:37:01,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:37:01,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:37:01,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:37:01,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:37:01,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:37:01,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:37:01,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:37:01,138 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:37:01,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:37:01,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:37:01,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:37:01,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:37:01,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:37:01,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:37:01,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:37:01,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:37:01,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:37:01,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:37:01,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:37:01,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:37:01,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:37:01,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:37:01,148 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 [2020-09-21 12:37:01,174 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:37:01,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:37:01,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:37:01,176 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:37:01,176 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:37:01,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:37:01,176 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:37:01,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:37:01,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:37:01,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:37:01,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:37:01,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:37:01,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:37:01,178 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:37:01,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:37:01,178 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:37:01,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:37:01,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:37:01,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:37:01,179 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:37:01,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:37:01,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:37:01,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:37:01,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:37:01,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:37:01,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:37:01,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:37:01,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:37:01,181 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:37:01,181 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.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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:37:01,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:37:01,697 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:37:01,701 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:37:01,705 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:37:01,706 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:37:01,708 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt7.c [2020-09-21 12:37:01,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c764f679/95ff470c66044e1a8bad4f53972ff33d/FLAGe42aab8ce [2020-09-21 12:37:02,377 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:37:02,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt7.c [2020-09-21 12:37:02,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c764f679/95ff470c66044e1a8bad4f53972ff33d/FLAGe42aab8ce [2020-09-21 12:37:02,694 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c764f679/95ff470c66044e1a8bad4f53972ff33d [2020-09-21 12:37:02,708 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:37:02,714 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:37:02,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:37:02,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:37:02,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:37:02,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:37:02" (1/1) ... [2020-09-21 12:37:02,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e8547d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:02, skipping insertion in model container [2020-09-21 12:37:02,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:37:02" (1/1) ... [2020-09-21 12:37:02,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:37:02,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:37:03,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:37:03,019 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:37:03,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:37:03,059 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:37:03,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:03 WrapperNode [2020-09-21 12:37:03,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:37:03,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:37:03,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:37:03,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:37:03,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:03" (1/1) ... [2020-09-21 12:37:03,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:03" (1/1) ... [2020-09-21 12:37:03,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:03" (1/1) ... [2020-09-21 12:37:03,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:03" (1/1) ... [2020-09-21 12:37:03,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:03" (1/1) ... [2020-09-21 12:37:03,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:03" (1/1) ... [2020-09-21 12:37:03,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:03" (1/1) ... [2020-09-21 12:37:03,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:37:03,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:37:03,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:37:03,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:37:03,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:03" (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 [2020-09-21 12:37:03,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:37:03,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:37:03,250 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:37:03,251 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:37:03,251 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:37:03,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:37:03,251 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:37:03,251 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:37:03,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:37:03,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:37:03,253 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:37:03,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:37:03,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:37:03,555 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:37:03,555 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 12:37:03,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:37:03 BoogieIcfgContainer [2020-09-21 12:37:03,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:37:03,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:37:03,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:37:03,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:37:03,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:37:02" (1/3) ... [2020-09-21 12:37:03,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530a5093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:37:03, skipping insertion in model container [2020-09-21 12:37:03,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:03" (2/3) ... [2020-09-21 12:37:03,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530a5093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:37:03, skipping insertion in model container [2020-09-21 12:37:03,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:37:03" (3/3) ... [2020-09-21 12:37:03,571 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt7.c [2020-09-21 12:37:03,585 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:37:03,607 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:37:03,656 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:37:03,686 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:37:03,686 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:37:03,687 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:37:03,687 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:37:03,687 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:37:03,687 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:37:03,687 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:37:03,687 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:37:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-21 12:37:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 12:37:03,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:03,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:03,717 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:03,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1473118151, now seen corresponding path program 1 times [2020-09-21 12:37:03,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:03,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301194948] [2020-09-21 12:37:03,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:03,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:04,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:04,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 12:37:04,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:04,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-09-21 12:37:04,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:04,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:37:04,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:37:04,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:37:04,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:37:04,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:04,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:04,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:04,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:04,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:04,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 12:37:04,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:04,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:04,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:04,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:04,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:04,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301194948] [2020-09-21 12:37:04,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:37:04,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 12:37:04,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043410808] [2020-09-21 12:37:04,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:37:04,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:04,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:37:04,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:37:04,906 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 8 states. [2020-09-21 12:37:09,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:09,654 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2020-09-21 12:37:09,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:37:09,656 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-09-21 12:37:09,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:09,669 INFO L225 Difference]: With dead ends: 73 [2020-09-21 12:37:09,670 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 12:37:09,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:37:09,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 12:37:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-09-21 12:37:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-21 12:37:09,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2020-09-21 12:37:09,726 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 14 [2020-09-21 12:37:09,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:09,727 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2020-09-21 12:37:09,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:37:09,727 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2020-09-21 12:37:09,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:37:09,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:09,728 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:09,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:37:09,729 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:09,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:09,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1990755954, now seen corresponding path program 1 times [2020-09-21 12:37:09,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:09,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917913696] [2020-09-21 12:37:09,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:09,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:09,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:10,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:10,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:10,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:10,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 12:37:10,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:37:10,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-09-21 12:37:10,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:10,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:37:10,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:37:10,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:37:10,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:37:10,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:10,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:10,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:10,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:10,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:10,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:37:10,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:10,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:10,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:10,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:10,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:10,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:37:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:10,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:10,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:10,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:10,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:10,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-21 12:37:10,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:10,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:10,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:10,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:10,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:10,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917913696] [2020-09-21 12:37:10,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:10,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:37:10,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857330214] [2020-09-21 12:37:10,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:37:10,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:10,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:37:10,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:37:10,958 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand 5 states. [2020-09-21 12:37:11,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:11,196 INFO L93 Difference]: Finished difference Result 64 states and 88 transitions. [2020-09-21 12:37:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:37:11,196 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-09-21 12:37:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:11,198 INFO L225 Difference]: With dead ends: 64 [2020-09-21 12:37:11,198 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 12:37:11,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:37:11,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 12:37:11,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-09-21 12:37:11,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 12:37:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-09-21 12:37:11,210 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 22 [2020-09-21 12:37:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:11,210 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-09-21 12:37:11,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:37:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-09-21 12:37:11,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:37:11,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:11,212 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:11,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:37:11,213 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:11,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:11,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1643040600, now seen corresponding path program 1 times [2020-09-21 12:37:11,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:11,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407719514] [2020-09-21 12:37:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:11,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:11,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:12,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:12,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:37:12,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:37:12,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-09-21 12:37:12,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:12,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:37:12,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:37:12,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 12:37:12,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:12,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:12,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:12,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:12,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:12,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:12,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:37:12,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:12,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:12,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:37:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:12,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:12,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:12,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:12,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:12,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 12:37:12,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:12,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:12,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:12,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:12,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:12,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407719514] [2020-09-21 12:37:12,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:12,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:37:12,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696355523] [2020-09-21 12:37:12,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:37:12,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:12,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:37:12,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:37:12,449 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 5 states. [2020-09-21 12:37:12,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:12,646 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2020-09-21 12:37:12,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:37:12,647 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-09-21 12:37:12,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:12,648 INFO L225 Difference]: With dead ends: 49 [2020-09-21 12:37:12,649 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 12:37:12,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:37:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 12:37:12,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-09-21 12:37:12,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 12:37:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-09-21 12:37:12,657 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 23 [2020-09-21 12:37:12,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:12,658 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-09-21 12:37:12,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:37:12,658 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-09-21 12:37:12,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:37:12,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:12,659 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] [2020-09-21 12:37:12,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:37:12,660 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:12,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:12,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1816528973, now seen corresponding path program 1 times [2020-09-21 12:37:12,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:12,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381755625] [2020-09-21 12:37:12,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:12,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:13,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:13,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:13,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 12:37:13,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:37:13,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1143 [2020-09-21 12:37:13,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:13,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:37:13,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:37:13,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:37:13,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:13,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:13,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:13,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:13,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:13,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:13,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:37:13,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:13,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:13,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:13,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:13,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:13,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:37:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:14,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:14,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:14,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:14,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:14,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 12:37:14,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:14,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:14,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:14,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:14,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:14,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381755625] [2020-09-21 12:37:14,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:14,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:37:14,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105493208] [2020-09-21 12:37:14,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:37:14,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:14,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:37:14,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:37:14,036 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 5 states. [2020-09-21 12:37:14,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:14,245 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-09-21 12:37:14,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:37:14,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-21 12:37:14,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:14,248 INFO L225 Difference]: With dead ends: 53 [2020-09-21 12:37:14,248 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 12:37:14,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:37:14,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 12:37:14,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-09-21 12:37:14,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 12:37:14,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-09-21 12:37:14,257 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 24 [2020-09-21 12:37:14,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:14,258 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-09-21 12:37:14,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:37:14,258 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-09-21 12:37:14,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:37:14,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:14,259 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] [2020-09-21 12:37:14,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:37:14,260 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:14,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:14,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1832149091, now seen corresponding path program 1 times [2020-09-21 12:37:14,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:14,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533206769] [2020-09-21 12:37:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:14,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:14,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:23,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:23,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:37:23,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:37:23,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9564 [2020-09-21 12:37:23,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:23,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:37:23,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:37:23,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 12:37:23,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:23,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:23,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:23,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:23,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:23,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:23,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:37:23,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:23,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:23,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:23,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:23,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:23,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:37:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:24,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:24,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:24,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:24,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:24,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 12:37:24,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:24,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:24,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:24,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:24,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:24,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533206769] [2020-09-21 12:37:24,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:24,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:37:24,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754010582] [2020-09-21 12:37:24,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:37:24,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:24,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:37:24,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:37:24,030 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 5 states. [2020-09-21 12:37:28,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:28,365 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-09-21 12:37:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:37:28,365 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-21 12:37:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:28,366 INFO L225 Difference]: With dead ends: 53 [2020-09-21 12:37:28,367 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 12:37:28,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:37:28,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 12:37:28,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-09-21 12:37:28,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-21 12:37:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-09-21 12:37:28,382 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 25 [2020-09-21 12:37:28,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:28,382 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-09-21 12:37:28,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:37:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-09-21 12:37:28,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:37:28,384 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:28,384 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, 1] [2020-09-21 12:37:28,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:37:28,384 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:28,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:28,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1835448792, now seen corresponding path program 1 times [2020-09-21 12:37:28,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:28,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167057722] [2020-09-21 12:37:28,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:28,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:30,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:31,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:31,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 12:37:31,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:37:31,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2782 [2020-09-21 12:37:31,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:31,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:37:31,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:37:31,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 12:37:31,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:31,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:31,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:31,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:31,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:31,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:31,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:37:31,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:31,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:31,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:31,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:31,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:31,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:37:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:31,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:31,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:31,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:31,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:31,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-21 12:37:31,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:31,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:31,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:31,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:31,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:31,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167057722] [2020-09-21 12:37:31,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:31,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:37:31,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084282691] [2020-09-21 12:37:31,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:37:31,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:31,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:37:31,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:37:31,369 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 5 states. [2020-09-21 12:37:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:35,746 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2020-09-21 12:37:35,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:37:35,747 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-09-21 12:37:35,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:35,748 INFO L225 Difference]: With dead ends: 52 [2020-09-21 12:37:35,748 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 12:37:35,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:37:35,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 12:37:35,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-09-21 12:37:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 12:37:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-09-21 12:37:35,761 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 26 [2020-09-21 12:37:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:35,761 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-09-21 12:37:35,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:37:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-09-21 12:37:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 12:37:35,763 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:35,763 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, 1, 1] [2020-09-21 12:37:35,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:37:35,765 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:35,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:35,766 INFO L82 PathProgramCache]: Analyzing trace with hash 576279582, now seen corresponding path program 1 times [2020-09-21 12:37:35,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:35,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771961484] [2020-09-21 12:37:35,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:35,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:36,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:43,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:43,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-21 12:37:43,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:37:43,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8041 [2020-09-21 12:37:43,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:43,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:37:43,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:37:43,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-21 12:37:43,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:43,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:43,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:43,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:43,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:43,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:43,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:37:43,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:43,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:43,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:43,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:43,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:43,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 12:37:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:43,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:43,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:43,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:43,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:43,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 12:37:43,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:43,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:43,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:43,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:43,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:43,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771961484] [2020-09-21 12:37:43,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:43,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:37:43,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866360788] [2020-09-21 12:37:43,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:37:43,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:43,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:37:43,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:37:43,964 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 5 states. [2020-09-21 12:37:46,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:46,212 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-09-21 12:37:46,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:37:46,212 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-21 12:37:46,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:46,213 INFO L225 Difference]: With dead ends: 53 [2020-09-21 12:37:46,213 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 12:37:46,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:37:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 12:37:46,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-09-21 12:37:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 12:37:46,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-09-21 12:37:46,221 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2020-09-21 12:37:46,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:46,222 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-09-21 12:37:46,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:37:46,222 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-09-21 12:37:46,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 12:37:46,223 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:46,223 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, 1, 1] [2020-09-21 12:37:46,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:37:46,223 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:46,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:46,224 INFO L82 PathProgramCache]: Analyzing trace with hash 633537884, now seen corresponding path program 1 times [2020-09-21 12:37:46,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:46,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113707386] [2020-09-21 12:37:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:46,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:46,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking...