/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=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/eca-rers2012/Problem14_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:25:53,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:25:53,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:25:53,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:25:53,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:25:53,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:25:53,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:25:53,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:25:53,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:25:53,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:25:53,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:25:53,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:25:53,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:25:53,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:25:53,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:25:53,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:25:53,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:25:53,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:25:53,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:25:53,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:25:53,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:25:53,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:25:53,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:25:53,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:25:53,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:25:53,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:25:53,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:25:53,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:25:53,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:25:53,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:25:53,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:25:53,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:25:53,920 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:25:53,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:25:53,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:25:53,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:25:53,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:25:53,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:25:53,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:25:53,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:25:53,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:25:53,932 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 18:25:53,980 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:25:53,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:25:53,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:25:53,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:25:53,983 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:25:53,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:25:53,984 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:25:53,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:25:53,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:25:53,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:25:53,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:25:53,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:25:53,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:25:53,986 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:25:53,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:25:53,986 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:25:53,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:25:53,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:25:53,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:25:53,987 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:25:53,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:25:53,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:25:53,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:25:53,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:25:53,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:25:53,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:25:53,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:25:53,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:25:53,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:25:53,990 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=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=5000;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=5000;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=5000;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=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:25:54,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:25:54,534 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:25:54,539 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:25:54,541 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:25:54,542 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:25:54,543 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-09-24 18:25:54,640 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7f881604/1f390a1d649a44a9acc8e269b0d26784/FLAGe39ae16e9 [2020-09-24 18:25:55,403 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:25:55,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-09-24 18:25:55,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7f881604/1f390a1d649a44a9acc8e269b0d26784/FLAGe39ae16e9 [2020-09-24 18:25:55,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7f881604/1f390a1d649a44a9acc8e269b0d26784 [2020-09-24 18:25:55,590 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:25:55,598 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:25:55,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:25:55,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:25:55,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:25:55,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:25:55" (1/1) ... [2020-09-24 18:25:55,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb7919e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:55, skipping insertion in model container [2020-09-24 18:25:55,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:25:55" (1/1) ... [2020-09-24 18:25:55,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:25:55,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:25:56,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:25:56,222 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:25:56,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:25:56,599 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:25:56,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:56 WrapperNode [2020-09-24 18:25:56,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:25:56,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:25:56,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:25:56,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:25:56,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:56" (1/1) ... [2020-09-24 18:25:56,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:56" (1/1) ... [2020-09-24 18:25:56,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:56" (1/1) ... [2020-09-24 18:25:56,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:56" (1/1) ... [2020-09-24 18:25:56,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:56" (1/1) ... [2020-09-24 18:25:56,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:56" (1/1) ... [2020-09-24 18:25:56,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:56" (1/1) ... [2020-09-24 18:25:56,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:25:56,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:25:56,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:25:56,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:25:56,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:56" (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 18:25:56,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:25:56,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:25:56,870 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 18:25:56,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:25:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 18:25:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:25:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:25:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 18:25:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:25:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:25:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:25:58,731 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:25:58,735 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 18:25:58,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:25:58 BoogieIcfgContainer [2020-09-24 18:25:58,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:25:58,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:25:58,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:25:58,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:25:58,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:25:55" (1/3) ... [2020-09-24 18:25:58,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6fd930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:25:58, skipping insertion in model container [2020-09-24 18:25:58,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:25:56" (2/3) ... [2020-09-24 18:25:58,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6fd930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:25:58, skipping insertion in model container [2020-09-24 18:25:58,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:25:58" (3/3) ... [2020-09-24 18:25:58,769 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label01.c [2020-09-24 18:25:58,782 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:25:58,797 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:25:58,822 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:25:58,863 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:25:58,864 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:25:58,864 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:25:58,864 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:25:58,864 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:25:58,864 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:25:58,865 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:25:58,865 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:25:58,900 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states. [2020-09-24 18:25:58,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 18:25:58,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:25:58,914 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, 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 18:25:58,914 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:25:58,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:25:58,923 INFO L82 PathProgramCache]: Analyzing trace with hash -899775614, now seen corresponding path program 1 times [2020-09-24 18:25:58,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:25:58,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615463834] [2020-09-24 18:25:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:25:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:59,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:59,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:59,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:59,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-24 18:25:59,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:25:59,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-09-24 18:25:59,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:59,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:25:59,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:25:59,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-09-24 18:25:59,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:25:59,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:25:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:59,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:59,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:59,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:25:59,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:59,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 18:25:59,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:59,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:25:59,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:59,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:25:59,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:59,946 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 18:25:59,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615463834] [2020-09-24 18:25:59,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:25:59,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:25:59,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803689195] [2020-09-24 18:25:59,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:25:59,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:25:59,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:25:59,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:25:59,981 INFO L87 Difference]: Start difference. First operand 678 states. Second operand 5 states. [2020-09-24 18:26:04,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:04,103 INFO L93 Difference]: Finished difference Result 1991 states and 2714 transitions. [2020-09-24 18:26:04,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 18:26:04,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-09-24 18:26:04,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:04,136 INFO L225 Difference]: With dead ends: 1991 [2020-09-24 18:26:04,136 INFO L226 Difference]: Without dead ends: 1250 [2020-09-24 18:26:04,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:26:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2020-09-24 18:26:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 997. [2020-09-24 18:26:04,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-09-24 18:26:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1236 transitions. [2020-09-24 18:26:04,287 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1236 transitions. Word has length 73 [2020-09-24 18:26:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:04,288 INFO L479 AbstractCegarLoop]: Abstraction has 997 states and 1236 transitions. [2020-09-24 18:26:04,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:26:04,288 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1236 transitions. [2020-09-24 18:26:04,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-24 18:26:04,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:04,301 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:26:04,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:26:04,301 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:04,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:04,302 INFO L82 PathProgramCache]: Analyzing trace with hash -893839862, now seen corresponding path program 1 times [2020-09-24 18:26:04,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:04,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306682691] [2020-09-24 18:26:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:04,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:04,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:05,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:05,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:05,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:07,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:08,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:08,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-09-24 18:26:08,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:26:08,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3680 [2020-09-24 18:26:08,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:08,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:08,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-09-24 18:26:08,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-24 18:26:08,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:08,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:08,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:08,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:08,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:08,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:08,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 18:26:08,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:08,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:08,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:08,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:08,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:08,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:26:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:08,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:08,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:08,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-24 18:26:08,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:08,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-24 18:26:08,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:08,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:08,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:08,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-24 18:26:08,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-24 18:26:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 56 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:08,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306682691] [2020-09-24 18:26:08,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:08,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:26:08,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366925716] [2020-09-24 18:26:08,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:26:08,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:08,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:26:08,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:08,382 INFO L87 Difference]: Start difference. First operand 997 states and 1236 transitions. Second operand 5 states. [2020-09-24 18:26:11,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:11,333 INFO L93 Difference]: Finished difference Result 2254 states and 2861 transitions. [2020-09-24 18:26:11,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:26:11,334 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2020-09-24 18:26:11,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:11,345 INFO L225 Difference]: With dead ends: 2254 [2020-09-24 18:26:11,345 INFO L226 Difference]: Without dead ends: 1272 [2020-09-24 18:26:11,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:26:11,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2020-09-24 18:26:11,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1188. [2020-09-24 18:26:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1188 states. [2020-09-24 18:26:11,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1482 transitions. [2020-09-24 18:26:11,406 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1482 transitions. Word has length 160 [2020-09-24 18:26:11,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:11,409 INFO L479 AbstractCegarLoop]: Abstraction has 1188 states and 1482 transitions. [2020-09-24 18:26:11,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:26:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1482 transitions. [2020-09-24 18:26:11,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-24 18:26:11,422 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:11,423 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:26:11,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:26:11,423 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:11,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:11,424 INFO L82 PathProgramCache]: Analyzing trace with hash -829752670, now seen corresponding path program 1 times [2020-09-24 18:26:11,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:11,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526847810] [2020-09-24 18:26:11,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:11,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:11,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:11,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:13,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:13,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:14,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:14,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:16,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:16,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-09-24 18:26:16,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 18:26:16,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 18:26:16,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:16,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:16,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 112 [2020-09-24 18:26:16,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-24 18:26:16,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:16,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:16,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:16,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:16,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:16,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:16,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 18:26:16,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:16,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:16,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:16,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:16,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:16,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:26:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:16,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:16,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:16,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-24 18:26:16,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:16,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-09-24 18:26:16,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:16,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:16,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:16,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-09-24 18:26:16,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 56 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:16,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526847810] [2020-09-24 18:26:16,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:16,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:26:16,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866296788] [2020-09-24 18:26:16,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:26:16,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:16,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:26:16,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:16,802 INFO L87 Difference]: Start difference. First operand 1188 states and 1482 transitions. Second operand 5 states. [2020-09-24 18:26:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:19,434 INFO L93 Difference]: Finished difference Result 1982 states and 2606 transitions. [2020-09-24 18:26:19,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:26:19,435 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2020-09-24 18:26:19,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:19,450 INFO L225 Difference]: With dead ends: 1982 [2020-09-24 18:26:19,450 INFO L226 Difference]: Without dead ends: 1980 [2020-09-24 18:26:19,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:26:19,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2020-09-24 18:26:19,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1572. [2020-09-24 18:26:19,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1572 states. [2020-09-24 18:26:19,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2051 transitions. [2020-09-24 18:26:19,518 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2051 transitions. Word has length 169 [2020-09-24 18:26:19,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:19,519 INFO L479 AbstractCegarLoop]: Abstraction has 1572 states and 2051 transitions. [2020-09-24 18:26:19,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:26:19,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2051 transitions. [2020-09-24 18:26:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-24 18:26:19,523 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:19,523 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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 18:26:19,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:26:19,530 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:19,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:19,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1043809266, now seen corresponding path program 1 times [2020-09-24 18:26:19,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:19,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787900658] [2020-09-24 18:26:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:19,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:19,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:19,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:21,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:21,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:21,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:23,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:23,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-09-24 18:26:23,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:26:23,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4349 [2020-09-24 18:26:23,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:23,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:23,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-09-24 18:26:23,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-24 18:26:23,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:23,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:23,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:23,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:23,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:23,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:23,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:26:24,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:24,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:24,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:26:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:24,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:24,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:24,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-24 18:26:24,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:24,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-24 18:26:24,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:24,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:24,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:24,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-09-24 18:26:24,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 56 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:24,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787900658] [2020-09-24 18:26:24,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:24,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:26:24,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241159760] [2020-09-24 18:26:24,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:26:24,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:24,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:26:24,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:24,169 INFO L87 Difference]: Start difference. First operand 1572 states and 2051 transitions. Second operand 5 states. [2020-09-24 18:26:26,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:26,824 INFO L93 Difference]: Finished difference Result 2364 states and 3182 transitions. [2020-09-24 18:26:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:26:26,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 176 [2020-09-24 18:26:26,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:26,842 INFO L225 Difference]: With dead ends: 2364 [2020-09-24 18:26:26,842 INFO L226 Difference]: Without dead ends: 2362 [2020-09-24 18:26:26,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:26:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2020-09-24 18:26:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 1576. [2020-09-24 18:26:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1576 states. [2020-09-24 18:26:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2062 transitions. [2020-09-24 18:26:26,911 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2062 transitions. Word has length 176 [2020-09-24 18:26:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:26,912 INFO L479 AbstractCegarLoop]: Abstraction has 1576 states and 2062 transitions. [2020-09-24 18:26:26,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:26:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2062 transitions. [2020-09-24 18:26:26,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-24 18:26:26,915 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:26,916 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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 18:26:26,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:26:26,916 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:26,917 INFO L82 PathProgramCache]: Analyzing trace with hash 2120468014, now seen corresponding path program 1 times [2020-09-24 18:26:26,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:26,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233032774] [2020-09-24 18:26:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:26,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:27,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:27,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:28,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:30,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:30,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-09-24 18:26:30,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 18:26:30,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3536 [2020-09-24 18:26:30,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:30,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:30,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 123 [2020-09-24 18:26:30,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-24 18:26:30,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:30,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:30,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:30,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:30,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:30,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:30,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 18:26:30,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:30,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:30,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:30,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:30,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:30,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:26:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:30,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:30,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:30,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-09-24 18:26:30,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:30,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-09-24 18:26:30,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:30,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:30,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:30,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-09-24 18:26:30,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 18:26:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 56 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:30,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233032774] [2020-09-24 18:26:30,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:30,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:26:30,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744962981] [2020-09-24 18:26:30,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:26:30,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:30,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:26:30,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:30,862 INFO L87 Difference]: Start difference. First operand 1576 states and 2062 transitions. Second operand 5 states. [2020-09-24 18:26:34,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:26:34,023 INFO L93 Difference]: Finished difference Result 4317 states and 5877 transitions. [2020-09-24 18:26:34,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:26:34,026 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 181 [2020-09-24 18:26:34,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:26:34,045 INFO L225 Difference]: With dead ends: 4317 [2020-09-24 18:26:34,046 INFO L226 Difference]: Without dead ends: 2756 [2020-09-24 18:26:34,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:26:34,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2020-09-24 18:26:34,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2349. [2020-09-24 18:26:34,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2020-09-24 18:26:34,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3037 transitions. [2020-09-24 18:26:34,147 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3037 transitions. Word has length 181 [2020-09-24 18:26:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:26:34,148 INFO L479 AbstractCegarLoop]: Abstraction has 2349 states and 3037 transitions. [2020-09-24 18:26:34,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:26:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3037 transitions. [2020-09-24 18:26:34,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-09-24 18:26:34,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:26:34,156 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:26:34,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:26:34,156 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:26:34,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:26:34,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1805085330, now seen corresponding path program 1 times [2020-09-24 18:26:34,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:26:34,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83387420] [2020-09-24 18:26:34,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:26:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:34,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:34,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:34,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:36,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:37,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:37,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:38,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:38,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:39,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:39,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-09-24 18:26:39,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 18:26:39,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-24 18:26:39,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:39,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:26:39,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 156 [2020-09-24 18:26:39,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-24 18:26:39,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:39,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:26:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:39,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:39,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:39,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:26:39,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:39,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:26:39,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:39,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:26:39,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:39,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:26:39,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:26:39,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:26:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:26:39,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:26:39,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:26:39,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-09-24 18:26:39,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:26:39,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-09-24 18:26:39,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:26:39,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:26:39,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:26:39,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-09-24 18:26:39,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:26:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 56 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:26:39,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83387420] [2020-09-24 18:26:39,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:26:39,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:26:39,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784389624] [2020-09-24 18:26:39,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:26:39,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:26:39,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:26:39,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:26:39,636 INFO L87 Difference]: Start difference. First operand 2349 states and 3037 transitions. Second operand 5 states.