/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_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:41:36,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:41:36,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:41:36,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:41:36,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:41:36,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:41:36,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:41:36,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:41:36,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:41:36,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:41:36,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:41:36,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:41:36,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:41:36,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:41:36,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:41:36,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:41:36,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:41:36,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:41:36,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:41:36,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:41:36,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:41:36,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:41:36,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:41:36,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:41:36,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:41:36,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:41:36,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:41:36,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:41:36,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:41:36,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:41:36,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:41:36,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:41:36,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:41:36,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:41:36,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:41:36,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:41:36,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:41:36,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:41:36,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:41:36,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:41:36,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:41:36,516 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 21:41:36,562 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:41:36,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:41:36,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:41:36,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:41:36,564 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:41:36,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:41:36,565 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:41:36,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:41:36,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:41:36,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:41:36,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:41:36,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:41:36,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:41:36,567 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:41:36,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:41:36,568 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:41:36,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:41:36,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:41:36,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:41:36,569 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:41:36,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:41:36,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:41:36,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:41:36,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:41:36,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:41:36,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:41:36,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:41:36,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:41:36,571 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:41:36,571 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 21:41:37,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:41:37,126 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:41:37,132 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:41:37,134 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:41:37,134 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:41:37,135 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label13.c [2020-09-24 21:41:37,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a94aa9bc5/8a1d0c60daf44cd0b55352a51afa723d/FLAG7aa40431a [2020-09-24 21:41:37,843 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:41:37,846 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label13.c [2020-09-24 21:41:37,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a94aa9bc5/8a1d0c60daf44cd0b55352a51afa723d/FLAG7aa40431a [2020-09-24 21:41:38,077 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a94aa9bc5/8a1d0c60daf44cd0b55352a51afa723d [2020-09-24 21:41:38,093 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:41:38,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:41:38,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:38,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:41:38,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:41:38,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:38" (1/1) ... [2020-09-24 21:41:38,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3116520e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:38, skipping insertion in model container [2020-09-24 21:41:38,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:38" (1/1) ... [2020-09-24 21:41:38,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:41:38,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:41:38,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:38,787 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:41:38,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:38,998 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:41:39,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:38 WrapperNode [2020-09-24 21:41:39,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:39,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:41:39,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:41:39,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:41:39,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:38" (1/1) ... [2020-09-24 21:41:39,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:38" (1/1) ... [2020-09-24 21:41:39,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:38" (1/1) ... [2020-09-24 21:41:39,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:38" (1/1) ... [2020-09-24 21:41:39,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:38" (1/1) ... [2020-09-24 21:41:39,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:38" (1/1) ... [2020-09-24 21:41:39,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:38" (1/1) ... [2020-09-24 21:41:39,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:41:39,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:41:39,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:41:39,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:41:39,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:38" (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 21:41:39,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:41:39,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:41:39,273 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:41:39,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:41:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:41:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:41:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:41:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:41:39,275 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:41:39,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:41:39,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:41:40,841 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:41:40,841 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:41:40,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:40 BoogieIcfgContainer [2020-09-24 21:41:40,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:41:40,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:41:40,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:41:40,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:41:40,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:41:38" (1/3) ... [2020-09-24 21:41:40,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f03ff3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:40, skipping insertion in model container [2020-09-24 21:41:40,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:38" (2/3) ... [2020-09-24 21:41:40,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f03ff3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:40, skipping insertion in model container [2020-09-24 21:41:40,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:40" (3/3) ... [2020-09-24 21:41:40,863 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label13.c [2020-09-24 21:41:40,876 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:41:40,887 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:41:40,907 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:41:40,945 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:41:40,945 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:41:40,945 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:41:40,945 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:41:40,946 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:41:40,946 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:41:40,946 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:41:40,946 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:41:40,981 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:41:41,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-24 21:41:41,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:41,003 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] [2020-09-24 21:41:41,003 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:41,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:41,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1743137911, now seen corresponding path program 1 times [2020-09-24 21:41:41,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:41,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603836947] [2020-09-24 21:41:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:41,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:41,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:42,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:44,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:44,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:44,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:44,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:46,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:46,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-09-24 21:41:46,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:41:46,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-24 21:41:46,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:46,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:41:46,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:41:46,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:41:46,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:41:46,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:46,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:46,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:46,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:46,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:46,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-24 21:41:46,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:46,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:41:46,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:46,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:46,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:47,235 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 21:41:47,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603836947] [2020-09-24 21:41:47,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:41:47,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:41:47,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159942826] [2020-09-24 21:41:47,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:41:47,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:47,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:41:47,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:41:47,270 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:41:48,013 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-09-24 21:41:48,281 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2020-09-24 21:41:48,976 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2020-09-24 21:41:49,400 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-09-24 21:41:50,572 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-09-24 21:41:50,767 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-09-24 21:41:51,086 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:41:51,884 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-09-24 21:41:52,384 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-09-24 21:41:52,598 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-09-24 21:41:53,579 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-09-24 21:41:54,024 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-09-24 21:41:56,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:56,502 INFO L93 Difference]: Finished difference Result 1869 states and 2661 transitions. [2020-09-24 21:41:56,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:41:56,504 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 112 [2020-09-24 21:41:56,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:56,539 INFO L225 Difference]: With dead ends: 1869 [2020-09-24 21:41:56,539 INFO L226 Difference]: Without dead ends: 1239 [2020-09-24 21:41:56,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:41:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2020-09-24 21:41:56,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1076. [2020-09-24 21:41:56,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:41:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1293 transitions. [2020-09-24 21:41:56,696 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1293 transitions. Word has length 112 [2020-09-24 21:41:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:56,696 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1293 transitions. [2020-09-24 21:41:56,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:41:56,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1293 transitions. [2020-09-24 21:41:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-09-24 21:41:56,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:56,708 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] [2020-09-24 21:41:56,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:41:56,708 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:56,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:56,709 INFO L82 PathProgramCache]: Analyzing trace with hash 316392811, now seen corresponding path program 1 times [2020-09-24 21:41:56,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:56,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149721195] [2020-09-24 21:41:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:56,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:56,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:57,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:57,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:57,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:59,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:00,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:00,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:01,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:01,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:01,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-09-24 21:42:01,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:42:01,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-09-24 21:42:01,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:01,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:42:01,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:42:01,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:42:01,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:42:02,567 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-09-24 21:42:02,764 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2020-09-24 21:42:03,010 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 44 [2020-09-24 21:42:03,229 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 40 [2020-09-24 21:42:03,469 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 36 [2020-09-24 21:42:03,655 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 31 [2020-09-24 21:42:03,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:42:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:03,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:03,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:03,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:42:03,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:03,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-24 21:42:03,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:03,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:42:03,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:42:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:42:03,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:03,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:42:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:03,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:03,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:03,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:42:03,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:03,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-24 21:42:03,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:03,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:42:03,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:42:03,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:42:03,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:04,320 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 21:42:04,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149721195] [2020-09-24 21:42:04,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:42:04,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:42:04,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251846032] [2020-09-24 21:42:04,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:42:04,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:42:04,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:42:04,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:42:04,327 INFO L87 Difference]: Start difference. First operand 1076 states and 1293 transitions. Second operand 19 states. [2020-09-24 21:42:05,445 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-09-24 21:42:05,843 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 107 [2020-09-24 21:42:06,529 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 100 [2020-09-24 21:42:06,936 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 97 [2020-09-24 21:42:07,175 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-09-24 21:42:07,796 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-09-24 21:42:08,164 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-09-24 21:42:08,718 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-09-24 21:42:09,223 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 82 [2020-09-24 21:42:09,630 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 94 [2020-09-24 21:42:10,712 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-09-24 21:42:11,625 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 79 [2020-09-24 21:42:12,165 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 89 [2020-09-24 21:42:13,277 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-09-24 21:42:14,043 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2020-09-24 21:42:14,575 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-09-24 21:42:15,118 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2020-09-24 21:42:17,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:42:17,553 INFO L93 Difference]: Finished difference Result 4103 states and 5484 transitions. [2020-09-24 21:42:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 21:42:17,554 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 134 [2020-09-24 21:42:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:42:17,586 INFO L225 Difference]: With dead ends: 4103 [2020-09-24 21:42:17,587 INFO L226 Difference]: Without dead ends: 3107 [2020-09-24 21:42:17,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=583, Invalid=1487, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 21:42:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2020-09-24 21:42:17,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3029. [2020-09-24 21:42:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3029 states. [2020-09-24 21:42:17,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3672 transitions. [2020-09-24 21:42:17,727 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3672 transitions. Word has length 134 [2020-09-24 21:42:17,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:42:17,728 INFO L479 AbstractCegarLoop]: Abstraction has 3029 states and 3672 transitions. [2020-09-24 21:42:17,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:42:17,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3672 transitions. [2020-09-24 21:42:17,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-09-24 21:42:17,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:17,737 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] [2020-09-24 21:42:17,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:42:17,738 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:17,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1992987478, now seen corresponding path program 1 times [2020-09-24 21:42:17,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:17,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576437138] [2020-09-24 21:42:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:17,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:18,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:18,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:18,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:19,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:19,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:19,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:19,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:20,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:20,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:20,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:22,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:22,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-09-24 21:42:22,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:42:22,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 21:42:22,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:22,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:42:22,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:42:22,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:42:22,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:22,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:42:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:22,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:23,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:23,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:42:23,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:23,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-24 21:42:23,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:23,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:42:23,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:42:23,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:42:23,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-24 21:42:23,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:42:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:23,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:23,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:23,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:23,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:42:23,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:42:23,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 21:42:23,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:23,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:42:23,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:42:23,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:42:23,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 21:42:23,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:42:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:23,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:23,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:23,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:23,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:42:23,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:42:23,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-09-24 21:42:23,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:23,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:42:23,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:42:23,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:42:23,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 21:42:23,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576437138] [2020-09-24 21:42:23,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:42:23,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:42:23,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907138343] [2020-09-24 21:42:23,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:42:23,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:42:23,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:42:23,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:42:23,597 INFO L87 Difference]: Start difference. First operand 3029 states and 3672 transitions. Second operand 13 states. [2020-09-24 21:42:29,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:42:29,646 INFO L93 Difference]: Finished difference Result 8671 states and 11475 transitions. [2020-09-24 21:42:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 21:42:29,647 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 147 [2020-09-24 21:42:29,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:42:29,682 INFO L225 Difference]: With dead ends: 8671 [2020-09-24 21:42:29,682 INFO L226 Difference]: Without dead ends: 5372 [2020-09-24 21:42:29,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2020-09-24 21:42:29,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5372 states. [2020-09-24 21:42:29,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5372 to 4730. [2020-09-24 21:42:29,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4730 states. [2020-09-24 21:42:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 5854 transitions. [2020-09-24 21:42:29,877 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 5854 transitions. Word has length 147 [2020-09-24 21:42:29,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:42:29,877 INFO L479 AbstractCegarLoop]: Abstraction has 4730 states and 5854 transitions. [2020-09-24 21:42:29,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:42:29,878 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 5854 transitions. [2020-09-24 21:42:29,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-09-24 21:42:29,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:29,897 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 21:42:29,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:42:29,897 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:29,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:29,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1004664194, now seen corresponding path program 1 times [2020-09-24 21:42:29,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:29,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712097481] [2020-09-24 21:42:29,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:29,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:30,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking...