/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/eca-rers2012/Problem02_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:41:52,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:41:52,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:41:52,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:41:52,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:41:52,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:41:52,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:41:52,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:41:52,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:41:52,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:41:52,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:41:52,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:41:52,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:41:52,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:41:52,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:41:52,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:41:52,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:41:52,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:41:52,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:41:52,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:41:52,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:41:52,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:41:52,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:41:52,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:41:52,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:41:52,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:41:52,959 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:41:52,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:41:52,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:41:52,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:41:52,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:41:52,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:41:52,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:41:52,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:41:52,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:41:52,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:41:52,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:41:52,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:41:52,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:41:52,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:41:52,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:41:52,971 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 21:41:53,018 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:41:53,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:41:53,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:41:53,021 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:41:53,021 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:41:53,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:41:53,022 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:41:53,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:41:53,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:41:53,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:41:53,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:41:53,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:41:53,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:41:53,024 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:41:53,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:41:53,025 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:41:53,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:41:53,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:41:53,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:41:53,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:41:53,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:41:53,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:41:53,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:41:53,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:41:53,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:41:53,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:41:53,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:41:53,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:41:53,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:41:53,028 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 21:41:53,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:41:53,494 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:41:53,498 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:41:53,500 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:41:53,501 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:41:53,502 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label18.c [2020-09-24 21:41:53,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad84765e2/2bdd321ac1734b0c81a7578a6f8c312e/FLAG7a9ea3aee [2020-09-24 21:41:54,180 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:41:54,184 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label18.c [2020-09-24 21:41:54,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad84765e2/2bdd321ac1734b0c81a7578a6f8c312e/FLAG7a9ea3aee [2020-09-24 21:41:54,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad84765e2/2bdd321ac1734b0c81a7578a6f8c312e [2020-09-24 21:41:54,456 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:41:54,461 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:41:54,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:54,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:41:54,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:41:54,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:54" (1/1) ... [2020-09-24 21:41:54,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21af3704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:54, skipping insertion in model container [2020-09-24 21:41:54,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:54" (1/1) ... [2020-09-24 21:41:54,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:41:54,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:41:55,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:55,260 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:41:55,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:55,370 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:41:55,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:55 WrapperNode [2020-09-24 21:41:55,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:55,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:41:55,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:41:55,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:41:55,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:55" (1/1) ... [2020-09-24 21:41:55,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:55" (1/1) ... [2020-09-24 21:41:55,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:55" (1/1) ... [2020-09-24 21:41:55,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:55" (1/1) ... [2020-09-24 21:41:55,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:55" (1/1) ... [2020-09-24 21:41:55,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:55" (1/1) ... [2020-09-24 21:41:55,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:55" (1/1) ... [2020-09-24 21:41:55,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:41:55,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:41:55,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:41:55,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:41:55,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:41:55,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:41:55,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:41:55,555 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:41:55,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:41:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:41:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:41:55,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:41:55,556 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:41:55,556 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:41:55,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:41:55,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:41:56,883 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:41:56,884 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:41:56,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:56 BoogieIcfgContainer [2020-09-24 21:41:56,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:41:56,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:41:56,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:41:56,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:41:56,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:41:54" (1/3) ... [2020-09-24 21:41:56,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787ebca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:56, skipping insertion in model container [2020-09-24 21:41:56,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:55" (2/3) ... [2020-09-24 21:41:56,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787ebca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:56, skipping insertion in model container [2020-09-24 21:41:56,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:56" (3/3) ... [2020-09-24 21:41:56,909 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label18.c [2020-09-24 21:41:56,920 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:41:56,936 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:41:56,958 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:41:56,999 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:41:57,000 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:41:57,000 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:41:57,001 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:41:57,001 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:41:57,001 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:41:57,001 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:41:57,001 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:41:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:41:57,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-24 21:41:57,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:57,079 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:41:57,079 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:57,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:57,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1150212666, now seen corresponding path program 1 times [2020-09-24 21:41:57,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:57,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793355088] [2020-09-24 21:41:57,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:57,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:57,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:58,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:58,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:58,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:59,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:59,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:00,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:00,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:01,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:02,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:02,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-09-24 21:42:02,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:42:02,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-24 21:42:02,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:42:02,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:42:02,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:42:02,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:42:03,063 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-09-24 21:42:03,187 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-09-24 21:42:03,311 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-09-24 21:42:03,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:42:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:03,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:03,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:03,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:42:03,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:03,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-09-24 21:42:03,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:03,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:42:03,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:42:03,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:42:03,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:04,089 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 21:42:04,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793355088] [2020-09-24 21:42:04,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:42:04,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:42:04,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094110642] [2020-09-24 21:42:04,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:42:04,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:42:04,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:42:04,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:42:04,120 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:42:04,648 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-24 21:42:04,912 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 98 [2020-09-24 21:42:05,252 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 95 [2020-09-24 21:42:05,951 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-09-24 21:42:06,415 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 91 [2020-09-24 21:42:07,573 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2020-09-24 21:42:07,784 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-09-24 21:42:08,118 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-09-24 21:42:08,877 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-09-24 21:42:09,353 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-09-24 21:42:09,567 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-09-24 21:42:10,639 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:42:11,066 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-09-24 21:42:13,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:42:13,488 INFO L93 Difference]: Finished difference Result 1870 states and 2662 transitions. [2020-09-24 21:42:13,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:42:13,490 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 153 [2020-09-24 21:42:13,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:42:13,520 INFO L225 Difference]: With dead ends: 1870 [2020-09-24 21:42:13,520 INFO L226 Difference]: Without dead ends: 1241 [2020-09-24 21:42:13,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:42:13,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-09-24 21:42:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1076. [2020-09-24 21:42:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:42:13,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1294 transitions. [2020-09-24 21:42:13,656 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1294 transitions. Word has length 153 [2020-09-24 21:42:13,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:42:13,656 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1294 transitions. [2020-09-24 21:42:13,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:42:13,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1294 transitions. [2020-09-24 21:42:13,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-09-24 21:42:13,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:13,664 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:42:13,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:42:13,665 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:13,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:13,665 INFO L82 PathProgramCache]: Analyzing trace with hash -448205160, now seen corresponding path program 1 times [2020-09-24 21:42:13,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:13,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497861904] [2020-09-24 21:42:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:13,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:13,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:13,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:14,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:15,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:15,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:17,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:17,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:17,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:18,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:18,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-09-24 21:42:18,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:42:18,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 21:42:18,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:18,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:42:18,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:42:18,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:42:18,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:19,406 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-09-24 21:42:19,610 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 43 [2020-09-24 21:42:19,776 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 39 [2020-09-24 21:42:19,936 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2020-09-24 21:42:20,086 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 30 [2020-09-24 21:42:20,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:42:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:20,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:20,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:20,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:42:20,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:20,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-24 21:42:20,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:20,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:42:20,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:42:20,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:42:20,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:20,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:42:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:20,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:20,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:20,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:42:20,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:20,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-24 21:42:20,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:20,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:42:20,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:42:20,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:42:20,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:42:20,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497861904] [2020-09-24 21:42:20,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:42:20,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:42:20,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583999334] [2020-09-24 21:42:20,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:42:20,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:42:20,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:42:20,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:42:20,729 INFO L87 Difference]: Start difference. First operand 1076 states and 1294 transitions. Second operand 19 states. [2020-09-24 21:42:21,528 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-09-24 21:42:22,048 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 100 [2020-09-24 21:42:22,379 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 97 [2020-09-24 21:42:23,807 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-09-24 21:42:24,138 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 94 [2020-09-24 21:42:25,520 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2020-09-24 21:42:25,955 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 89 [2020-09-24 21:42:27,301 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2020-09-24 21:42:28,065 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2020-09-24 21:42:29,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:42:29,982 INFO L93 Difference]: Finished difference Result 4103 states and 5490 transitions. [2020-09-24 21:42:29,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 21:42:29,983 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 175 [2020-09-24 21:42:29,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:42:30,006 INFO L225 Difference]: With dead ends: 4103 [2020-09-24 21:42:30,007 INFO L226 Difference]: Without dead ends: 3107 [2020-09-24 21:42:30,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=593, Invalid=1477, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 21:42:30,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2020-09-24 21:42:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3029. [2020-09-24 21:42:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3029 states. [2020-09-24 21:42:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3673 transitions. [2020-09-24 21:42:30,195 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3673 transitions. Word has length 175 [2020-09-24 21:42:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:42:30,198 INFO L479 AbstractCegarLoop]: Abstraction has 3029 states and 3673 transitions. [2020-09-24 21:42:30,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:42:30,199 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3673 transitions. [2020-09-24 21:42:30,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-09-24 21:42:30,221 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:30,221 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:42:30,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:42:30,222 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:30,222 INFO L82 PathProgramCache]: Analyzing trace with hash 445416717, now seen corresponding path program 1 times [2020-09-24 21:42:30,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:30,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182908635] [2020-09-24 21:42:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:30,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:30,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:30,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:30,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:30,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:32,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:32,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:33,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:34,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:34,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:35,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:35,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-09-24 21:42:35,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:42:35,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-24 21:42:35,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:35,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:42:35,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:42:35,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-09-24 21:42:35,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:35,776 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 27 [2020-09-24 21:42:35,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:42:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:35,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:35,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:35,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:42:35,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:35,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-24 21:42:35,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:35,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:42:35,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:42:35,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:42:35,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-24 21:42:35,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:42:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:35,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:35,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:35,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:35,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:42:35,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:42:35,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-24 21:42:35,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:35,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:42:35,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:42:35,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:42:35,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:36,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:42:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:36,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:36,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:36,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:36,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:42:36,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:42:36,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-24 21:42:36,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:36,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:42:36,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:42:36,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:42:36,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 21:42:36,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182908635] [2020-09-24 21:42:36,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:42:36,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:42:36,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615796480] [2020-09-24 21:42:36,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:42:36,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:42:36,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:42:36,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:42:36,317 INFO L87 Difference]: Start difference. First operand 3029 states and 3673 transitions. Second operand 12 states. [2020-09-24 21:42:37,031 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-09-24 21:42:37,249 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-09-24 21:42:37,701 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-09-24 21:42:39,918 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-09-24 21:42:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:42:42,419 INFO L93 Difference]: Finished difference Result 8636 states and 11459 transitions. [2020-09-24 21:42:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 21:42:42,420 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 188 [2020-09-24 21:42:42,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:42:42,449 INFO L225 Difference]: With dead ends: 8636 [2020-09-24 21:42:42,449 INFO L226 Difference]: Without dead ends: 5365 [2020-09-24 21:42:42,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=249, Invalid=563, Unknown=0, NotChecked=0, Total=812 [2020-09-24 21:42:42,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5365 states. [2020-09-24 21:42:42,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5365 to 4717. [2020-09-24 21:42:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4717 states. [2020-09-24 21:42:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4717 states to 4717 states and 5814 transitions. [2020-09-24 21:42:42,624 INFO L78 Accepts]: Start accepts. Automaton has 4717 states and 5814 transitions. Word has length 188 [2020-09-24 21:42:42,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:42:42,625 INFO L479 AbstractCegarLoop]: Abstraction has 4717 states and 5814 transitions. [2020-09-24 21:42:42,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:42:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 4717 states and 5814 transitions. [2020-09-24 21:42:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-09-24 21:42:42,644 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:42,644 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:42:42,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:42:42,645 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:42,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:42,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1557279554, now seen corresponding path program 1 times [2020-09-24 21:42:42,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:42,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067732437] [2020-09-24 21:42:42,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:42,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:42,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:43,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:43,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:43,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:44,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:45,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:46,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking...