/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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:48:52,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:48:52,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:48:52,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:48:52,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:48:52,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:48:52,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:48:52,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:48:52,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:48:52,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:48:52,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:48:52,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:48:52,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:48:52,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:48:52,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:48:52,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:48:52,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:48:52,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:48:52,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:48:52,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:48:52,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:48:52,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:48:52,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:48:52,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:48:52,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:48:52,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:48:52,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:48:52,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:48:52,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:48:52,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:48:52,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:48:52,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:48:52,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:48:52,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:48:52,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:48:52,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:48:52,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:48:52,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:48:52,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:48:52,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:48:52,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:48:52,834 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 21:48:52,862 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:48:52,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:48:52,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:48:52,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:48:52,864 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:48:52,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:48:52,865 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:48:52,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:48:52,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:48:52,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:48:52,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:48:52,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:48:52,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:48:52,866 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:48:52,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:48:52,867 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:48:52,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:48:52,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:48:52,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:48:52,868 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:48:52,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:48:52,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:48:52,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:48:52,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:48:52,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:48:52,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:48:52,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:48:52,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:48:52,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:48:52,870 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:48:53,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:48:53,370 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:48:53,374 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:48:53,377 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:48:53,379 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:48:53,380 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-09-24 21:48:53,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0051355cf/c6dae3f30ab94766b18477df892d4be0/FLAGc575c6eb6 [2020-09-24 21:48:54,024 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:48:54,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs2f.c [2020-09-24 21:48:54,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0051355cf/c6dae3f30ab94766b18477df892d4be0/FLAGc575c6eb6 [2020-09-24 21:48:54,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0051355cf/c6dae3f30ab94766b18477df892d4be0 [2020-09-24 21:48:54,389 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:48:54,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:48:54,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:48:54,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:48:54,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:48:54,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:48:54" (1/1) ... [2020-09-24 21:48:54,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44406637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:54, skipping insertion in model container [2020-09-24 21:48:54,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:48:54" (1/1) ... [2020-09-24 21:48:54,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:48:54,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:48:54,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:48:54,715 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:48:54,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:48:54,764 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:48:54,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:54 WrapperNode [2020-09-24 21:48:54,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:48:54,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:48:54,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:48:54,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:48:54,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:54" (1/1) ... [2020-09-24 21:48:54,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:54" (1/1) ... [2020-09-24 21:48:54,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:54" (1/1) ... [2020-09-24 21:48:54,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:54" (1/1) ... [2020-09-24 21:48:54,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:54" (1/1) ... [2020-09-24 21:48:54,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:54" (1/1) ... [2020-09-24 21:48:54,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:54" (1/1) ... [2020-09-24 21:48:54,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:48:54,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:48:54,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:48:54,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:48:54,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:54" (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 21:48:54,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:48:54,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:48:54,973 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:48:54,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:48:54,973 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:48:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:48:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:48:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:48:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:48:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:48:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 21:48:54,975 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:48:54,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 21:48:54,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 21:48:54,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:48:54,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:48:54,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:48:54,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:48:54,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:48:55,320 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:48:55,321 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 21:48:55,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:48:55 BoogieIcfgContainer [2020-09-24 21:48:55,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:48:55,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:48:55,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:48:55,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:48:55,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:48:54" (1/3) ... [2020-09-24 21:48:55,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e2f7143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:48:55, skipping insertion in model container [2020-09-24 21:48:55,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:48:54" (2/3) ... [2020-09-24 21:48:55,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e2f7143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:48:55, skipping insertion in model container [2020-09-24 21:48:55,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:48:55" (3/3) ... [2020-09-24 21:48:55,336 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-09-24 21:48:55,348 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:48:55,357 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:48:55,375 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:48:55,402 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:48:55,402 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:48:55,402 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:48:55,403 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:48:55,403 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:48:55,403 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:48:55,403 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:48:55,403 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:48:55,425 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-09-24 21:48:55,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 21:48:55,433 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:48:55,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:48:55,435 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:48:55,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:48:55,441 INFO L82 PathProgramCache]: Analyzing trace with hash 221259408, now seen corresponding path program 1 times [2020-09-24 21:48:55,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:48:55,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656284617] [2020-09-24 21:48:55,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:48:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:55,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:55,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:56,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:56,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-24 21:48:56,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:48:56,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-09-24 21:48:56,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:56,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:48:56,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:48:56,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:48:56,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 21:48:56,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:48:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:56,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:56,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:56,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:48:56,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:56,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 21:48:56,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:56,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:48:56,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:48:56,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:48:56,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:56,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:48:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:56,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:56,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:56,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:48:56,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:56,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 21:48:56,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:48:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:48:56,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:48:56,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:56,234 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 21:48:56,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656284617] [2020-09-24 21:48:56,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:48:56,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:48:56,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780611795] [2020-09-24 21:48:56,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:48:56,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:48:56,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:48:56,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:48:56,269 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 5 states. [2020-09-24 21:48:56,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:48:56,575 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2020-09-24 21:48:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:48:56,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-09-24 21:48:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:48:56,590 INFO L225 Difference]: With dead ends: 107 [2020-09-24 21:48:56,590 INFO L226 Difference]: Without dead ends: 49 [2020-09-24 21:48:56,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:48:56,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-24 21:48:56,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-09-24 21:48:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-24 21:48:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-09-24 21:48:56,664 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 30 [2020-09-24 21:48:56,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:48:56,664 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-09-24 21:48:56,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:48:56,665 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-09-24 21:48:56,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 21:48:56,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:48:56,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:48:56,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:48:56,667 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:48:56,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:48:56,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1707000309, now seen corresponding path program 1 times [2020-09-24 21:48:56,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:48:56,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015873216] [2020-09-24 21:48:56,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:48:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:56,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:56,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:56,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:57,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:58,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:58,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 21:48:58,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:48:58,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2090 [2020-09-24 21:48:58,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:58,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:48:58,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:48:58,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 21:48:58,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:48:58,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:48:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:58,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:58,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:58,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:48:58,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:58,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:48:58,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:58,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:48:58,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:48:58,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:48:58,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:48:58,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:48:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:58,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:58,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:48:58,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:48:58,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:48:58,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:48:58,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:48:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:48:58,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:48:58,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:48:58,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:48:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:48:58,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015873216] [2020-09-24 21:48:58,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:48:58,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 21:48:58,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172611743] [2020-09-24 21:48:58,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:48:58,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:48:58,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:48:58,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:48:58,953 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 8 states. [2020-09-24 21:48:59,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:48:59,264 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-09-24 21:48:59,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 21:48:59,266 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-09-24 21:48:59,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:48:59,269 INFO L225 Difference]: With dead ends: 64 [2020-09-24 21:48:59,269 INFO L226 Difference]: Without dead ends: 58 [2020-09-24 21:48:59,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:48:59,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-24 21:48:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-09-24 21:48:59,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 21:48:59,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-09-24 21:48:59,293 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 42 [2020-09-24 21:48:59,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:48:59,294 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-09-24 21:48:59,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:48:59,294 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-09-24 21:48:59,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 21:48:59,302 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:48:59,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:48:59,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:48:59,303 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:48:59,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:48:59,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1495951507, now seen corresponding path program 1 times [2020-09-24 21:48:59,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:48:59,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302458686] [2020-09-24 21:48:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:48:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:48:59,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:59,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:48:59,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:00,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:00,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 21:49:00,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:49:00,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 903 [2020-09-24 21:49:00,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:00,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:49:00,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:49:00,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 21:49:00,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:00,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:00,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:00,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:00,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:49:00,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:00,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:49:00,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:00,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:00,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:00,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:00,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:00,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:49:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:00,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:00,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:00,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:49:00,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:00,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:49:00,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:00,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:49:00,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:00,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:49:00,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:49:00,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302458686] [2020-09-24 21:49:00,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:00,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:49:00,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592761231] [2020-09-24 21:49:00,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:49:00,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:00,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:49:00,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:49:00,487 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 12 states. [2020-09-24 21:49:01,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:01,036 INFO L93 Difference]: Finished difference Result 114 states and 127 transitions. [2020-09-24 21:49:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 21:49:01,037 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-09-24 21:49:01,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:01,038 INFO L225 Difference]: With dead ends: 114 [2020-09-24 21:49:01,038 INFO L226 Difference]: Without dead ends: 67 [2020-09-24 21:49:01,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2020-09-24 21:49:01,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-24 21:49:01,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2020-09-24 21:49:01,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 21:49:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-09-24 21:49:01,048 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 46 [2020-09-24 21:49:01,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:01,048 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-09-24 21:49:01,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:49:01,049 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-09-24 21:49:01,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 21:49:01,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:01,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:49:01,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:49:01,051 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:01,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:01,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1872706551, now seen corresponding path program 1 times [2020-09-24 21:49:01,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:01,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270006510] [2020-09-24 21:49:01,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:01,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:01,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:01,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:01,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:04,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:04,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 21:49:04,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:49:04,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3697 [2020-09-24 21:49:04,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:04,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:49:04,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-24 21:49:04,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:49:04,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:04,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:04,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:04,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:04,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:49:04,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:04,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:49:04,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:04,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:04,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:04,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:04,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:04,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:49:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:04,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:04,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:04,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:49:04,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:04,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:49:04,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:04,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:04,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:04,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:04,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-24 21:49:04,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270006510] [2020-09-24 21:49:04,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:04,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:49:04,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046800869] [2020-09-24 21:49:04,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:49:04,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:04,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:49:04,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:49:04,926 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 6 states. [2020-09-24 21:49:05,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:05,099 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2020-09-24 21:49:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:49:05,099 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-09-24 21:49:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:05,101 INFO L225 Difference]: With dead ends: 94 [2020-09-24 21:49:05,101 INFO L226 Difference]: Without dead ends: 63 [2020-09-24 21:49:05,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:49:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-24 21:49:05,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-09-24 21:49:05,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-24 21:49:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-09-24 21:49:05,118 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 58 [2020-09-24 21:49:05,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:05,120 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-09-24 21:49:05,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:49:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-09-24 21:49:05,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 21:49:05,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:05,123 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:49:05,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:49:05,124 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:05,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:05,124 INFO L82 PathProgramCache]: Analyzing trace with hash -557611095, now seen corresponding path program 1 times [2020-09-24 21:49:05,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:05,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589396216] [2020-09-24 21:49:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:05,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:05,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:05,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:05,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:05,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:06,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:06,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:07,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:07,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:07,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:10,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:10,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 21:49:10,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:49:10,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 21:49:10,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:10,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:49:10,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:49:10,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 21:49:10,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:10,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:10,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:10,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:10,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:49:10,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:10,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:49:10,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:10,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:10,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:10,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:10,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:10,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:49:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:10,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:10,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:10,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:49:10,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:10,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:49:10,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:10,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:49:10,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:10,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:49:10,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:49:10,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589396216] [2020-09-24 21:49:10,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:10,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 21:49:10,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155648697] [2020-09-24 21:49:10,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:49:10,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:10,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:49:10,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:49:10,715 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 18 states. [2020-09-24 21:49:11,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:11,741 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-09-24 21:49:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 21:49:11,742 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-09-24 21:49:11,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:11,744 INFO L225 Difference]: With dead ends: 108 [2020-09-24 21:49:11,744 INFO L226 Difference]: Without dead ends: 102 [2020-09-24 21:49:11,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 21:49:11,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-24 21:49:11,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2020-09-24 21:49:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-24 21:49:11,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2020-09-24 21:49:11,764 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 58 [2020-09-24 21:49:11,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:11,766 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2020-09-24 21:49:11,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:49:11,766 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2020-09-24 21:49:11,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-24 21:49:11,768 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:11,769 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:49:11,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:49:11,769 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:11,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:11,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2138852750, now seen corresponding path program 2 times [2020-09-24 21:49:11,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:11,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720520769] [2020-09-24 21:49:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:11,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:11,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:12,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:12,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:12,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:13,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:13,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:14,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:14,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:14,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:16,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:16,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 21:49:16,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:49:16,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-24 21:49:16,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:16,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:49:16,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-24 21:49:16,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 21:49:16,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:17,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:17,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:17,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:17,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:49:17,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:17,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:49:17,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:17,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:17,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:17,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:17,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:17,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:49:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:17,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:17,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:17,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:49:17,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:17,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:49:17,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:17,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:17,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:17,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:17,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:17,093 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:49:17,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720520769] [2020-09-24 21:49:17,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:17,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:49:17,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78665113] [2020-09-24 21:49:17,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:49:17,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:17,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:49:17,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:49:17,099 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 16 states. [2020-09-24 21:49:18,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:18,343 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2020-09-24 21:49:18,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-24 21:49:18,344 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-09-24 21:49:18,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:18,346 INFO L225 Difference]: With dead ends: 133 [2020-09-24 21:49:18,346 INFO L226 Difference]: Without dead ends: 127 [2020-09-24 21:49:18,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=268, Invalid=1292, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 21:49:18,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-24 21:49:18,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2020-09-24 21:49:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-24 21:49:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 129 transitions. [2020-09-24 21:49:18,360 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 129 transitions. Word has length 64 [2020-09-24 21:49:18,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:18,361 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 129 transitions. [2020-09-24 21:49:18,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:49:18,361 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 129 transitions. [2020-09-24 21:49:18,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-24 21:49:18,362 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:18,362 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:49:18,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:49:18,363 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:18,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:18,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1245154100, now seen corresponding path program 3 times [2020-09-24 21:49:18,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:18,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486372378] [2020-09-24 21:49:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:18,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:18,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:18,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:19,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:19,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:19,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:19,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:20,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:20,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:20,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:23,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:23,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-24 21:49:23,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:49:23,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:49:23,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:23,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:49:23,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:49:23,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 21:49:23,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:23,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:23,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:23,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:23,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:49:23,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:23,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:49:23,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:23,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:23,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:23,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:23,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:23,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:49:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:23,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:23,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:23,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:49:23,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:23,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:49:23,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:23,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:49:23,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:23,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:49:23,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:49:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 21:49:23,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486372378] [2020-09-24 21:49:23,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:23,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 21:49:23,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795648599] [2020-09-24 21:49:23,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:49:23,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:23,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:49:23,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:49:23,714 INFO L87 Difference]: Start difference. First operand 118 states and 129 transitions. Second operand 17 states. [2020-09-24 21:49:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:24,595 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2020-09-24 21:49:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-24 21:49:24,596 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-09-24 21:49:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:24,597 INFO L225 Difference]: With dead ends: 158 [2020-09-24 21:49:24,598 INFO L226 Difference]: Without dead ends: 152 [2020-09-24 21:49:24,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=291, Invalid=1115, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 21:49:24,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-24 21:49:24,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2020-09-24 21:49:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-24 21:49:24,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 157 transitions. [2020-09-24 21:49:24,625 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 157 transitions. Word has length 68 [2020-09-24 21:49:24,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:24,626 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 157 transitions. [2020-09-24 21:49:24,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:49:24,626 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 157 transitions. [2020-09-24 21:49:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-24 21:49:24,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:24,627 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:49:24,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:49:24,628 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:24,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:24,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1864607259, now seen corresponding path program 4 times [2020-09-24 21:49:24,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:24,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407840390] [2020-09-24 21:49:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:24,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:24,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:24,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:25,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:25,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:26,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:26,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:26,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:27,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:29,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:29,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-24 21:49:29,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:49:29,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-09-24 21:49:29,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:29,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:49:29,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:49:29,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 21:49:29,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:30,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:49:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:30,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:30,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:30,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 21:49:30,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:30,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:49:30,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:30,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:49:30,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:30,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:49:30,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:30,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 21:49:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:30,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:30,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:49:30,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:49:30,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:49:30,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:49:30,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:49:30,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:49:30,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:49:30,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:49:30,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:49:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-24 21:49:30,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407840390] [2020-09-24 21:49:30,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:49:30,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:49:30,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539896192] [2020-09-24 21:49:30,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:49:30,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:49:30,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:49:30,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:49:30,147 INFO L87 Difference]: Start difference. First operand 143 states and 157 transitions. Second operand 20 states. [2020-09-24 21:49:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:49:31,616 INFO L93 Difference]: Finished difference Result 189 states and 206 transitions. [2020-09-24 21:49:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 21:49:31,617 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 70 [2020-09-24 21:49:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:49:31,619 INFO L225 Difference]: With dead ends: 189 [2020-09-24 21:49:31,619 INFO L226 Difference]: Without dead ends: 183 [2020-09-24 21:49:31,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=268, Invalid=1214, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 21:49:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-24 21:49:31,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 154. [2020-09-24 21:49:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-24 21:49:31,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 169 transitions. [2020-09-24 21:49:31,632 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 169 transitions. Word has length 70 [2020-09-24 21:49:31,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:49:31,633 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 169 transitions. [2020-09-24 21:49:31,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:49:31,633 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 169 transitions. [2020-09-24 21:49:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-24 21:49:31,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:31,634 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:49:31,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:49:31,634 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:31,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:31,635 INFO L82 PathProgramCache]: Analyzing trace with hash 685477565, now seen corresponding path program 5 times [2020-09-24 21:49:31,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:31,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051345285] [2020-09-24 21:49:31,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 21:49:31,656 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 21:49:31,656 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 21:49:31,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:49:31,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:49:31 BoogieIcfgContainer [2020-09-24 21:49:31,681 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:49:31,685 INFO L168 Benchmark]: Toolchain (without parser) took 37293.14 ms. Allocated memory was 146.3 MB in the beginning and 433.1 MB in the end (delta: 286.8 MB). Free memory was 103.0 MB in the beginning and 192.6 MB in the end (delta: -89.6 MB). Peak memory consumption was 197.2 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:31,686 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 21:49:31,687 INFO L168 Benchmark]: CACSL2BoogieTranslator took 365.73 ms. Allocated memory is still 146.3 MB. Free memory was 102.3 MB in the beginning and 91.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:31,688 INFO L168 Benchmark]: Boogie Preprocessor took 127.61 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 91.9 MB in the beginning and 179.0 MB in the end (delta: -87.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:31,688 INFO L168 Benchmark]: RCFGBuilder took 433.46 ms. Allocated memory is still 201.9 MB. Free memory was 179.0 MB in the beginning and 161.0 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:31,689 INFO L168 Benchmark]: TraceAbstraction took 36353.75 ms. Allocated memory was 201.9 MB in the beginning and 433.1 MB in the end (delta: 231.2 MB). Free memory was 160.4 MB in the beginning and 192.6 MB in the end (delta: -32.2 MB). Peak memory consumption was 199.0 MB. Max. memory is 7.1 GB. [2020-09-24 21:49:31,693 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 365.73 ms. Allocated memory is still 146.3 MB. Free memory was 102.3 MB in the beginning and 91.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.61 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 91.9 MB in the beginning and 179.0 MB in the end (delta: -87.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 433.46 ms. Allocated memory is still 201.9 MB. Free memory was 179.0 MB in the beginning and 161.0 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 36353.75 ms. Allocated memory was 201.9 MB in the beginning and 433.1 MB in the end (delta: 231.2 MB). Free memory was 160.4 MB in the beginning and 192.6 MB in the end (delta: -32.2 MB). Peak memory consumption was 199.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 [L29] COND TRUE i