/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:24:25,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:24:25,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:24:25,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:24:25,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:24:25,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:24:25,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:24:25,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:24:25,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:24:25,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:24:25,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:24:25,704 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:24:25,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:24:25,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:24:25,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:24:25,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:24:25,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:24:25,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:24:25,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:24:25,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:24:25,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:24:25,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:24:25,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:24:25,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:24:25,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:24:25,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:24:25,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:24:25,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:24:25,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:24:25,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:24:25,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:24:25,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:24:25,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:24:25,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:24:25,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:24:25,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:24:25,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:24:25,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:24:25,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:24:25,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:24:25,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:24:25,769 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 18:24:25,815 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:24:25,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:24:25,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:24:25,818 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:24:25,819 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:24:25,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:24:25,819 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:24:25,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:24:25,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:24:25,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:24:25,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:24:25,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:24:25,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:24:25,822 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:24:25,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:24:25,823 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:24:25,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:24:25,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:24:25,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:24:25,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:24:25,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:24:25,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:24:25,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:24:25,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:24:25,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:24:25,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:24:25,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:24:25,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:24:25,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:24:25,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:24:26,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:24:26,333 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:24:26,336 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:24:26,340 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:24:26,341 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:24:26,342 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label19.c [2020-09-24 18:24:26,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/133966863/c8f6b525a82644cd9ad132c19b3a80a0/FLAGd8643bc41 [2020-09-24 18:24:27,114 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:24:27,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem10_label19.c [2020-09-24 18:24:27,130 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/133966863/c8f6b525a82644cd9ad132c19b3a80a0/FLAGd8643bc41 [2020-09-24 18:24:27,370 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/133966863/c8f6b525a82644cd9ad132c19b3a80a0 [2020-09-24 18:24:27,383 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:24:27,388 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:24:27,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:24:27,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:24:27,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:24:27,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:24:27" (1/1) ... [2020-09-24 18:24:27,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57c4c539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:27, skipping insertion in model container [2020-09-24 18:24:27,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:24:27" (1/1) ... [2020-09-24 18:24:27,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:24:27,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:24:28,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:24:28,082 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:24:28,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:24:28,264 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:24:28,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:28 WrapperNode [2020-09-24 18:24:28,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:24:28,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:24:28,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:24:28,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:24:28,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:28" (1/1) ... [2020-09-24 18:24:28,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:28" (1/1) ... [2020-09-24 18:24:28,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:28" (1/1) ... [2020-09-24 18:24:28,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:28" (1/1) ... [2020-09-24 18:24:28,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:28" (1/1) ... [2020-09-24 18:24:28,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:28" (1/1) ... [2020-09-24 18:24:28,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:28" (1/1) ... [2020-09-24 18:24:28,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:24:28,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:24:28,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:24:28,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:24:28,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:24:28,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:24:28,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:24:28,495 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 18:24:28,495 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:24:28,495 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 18:24:28,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:24:28,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:24:28,496 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 18:24:28,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:24:28,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:24:28,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:24:29,905 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:24:29,905 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 18:24:29,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:24:29 BoogieIcfgContainer [2020-09-24 18:24:29,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:24:29,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:24:29,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:24:29,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:24:29,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:24:27" (1/3) ... [2020-09-24 18:24:29,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ba8ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:24:29, skipping insertion in model container [2020-09-24 18:24:29,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:28" (2/3) ... [2020-09-24 18:24:29,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ba8ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:24:29, skipping insertion in model container [2020-09-24 18:24:29,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:24:29" (3/3) ... [2020-09-24 18:24:29,931 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label19.c [2020-09-24 18:24:29,944 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:24:29,956 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:24:29,983 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:24:30,021 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:24:30,022 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:24:30,022 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:24:30,022 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:24:30,022 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:24:30,022 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:24:30,023 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:24:30,023 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:24:30,057 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states. [2020-09-24 18:24:30,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 18:24:30,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:24:30,070 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] [2020-09-24 18:24:30,070 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:24:30,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:24:30,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1688264769, now seen corresponding path program 1 times [2020-09-24 18:24:30,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:24:30,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284248429] [2020-09-24 18:24:30,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:24:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:24:30,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:30,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:30,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:24:30,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 18:24:30,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:24:30,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-09-24 18:24:30,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:24:30,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:24:30,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:24:30,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 18:24:30,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 18:24:30,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:24:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:24:30,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:30,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:24:30,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:24:30,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:24:30,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 18:24:30,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:24:30,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:24:30,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:24:30,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:24:30,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:24:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:24:31,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284248429] [2020-09-24 18:24:31,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:24:31,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:24:31,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865869135] [2020-09-24 18:24:31,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:24:31,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:24:31,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:24:31,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:24:31,050 INFO L87 Difference]: Start difference. First operand 456 states. Second operand 4 states. [2020-09-24 18:24:33,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:24:33,031 INFO L93 Difference]: Finished difference Result 1069 states and 1495 transitions. [2020-09-24 18:24:33,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:24:33,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-09-24 18:24:33,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:24:33,056 INFO L225 Difference]: With dead ends: 1069 [2020-09-24 18:24:33,057 INFO L226 Difference]: Without dead ends: 555 [2020-09-24 18:24:33,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:24:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-09-24 18:24:33,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 543. [2020-09-24 18:24:33,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2020-09-24 18:24:33,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 670 transitions. [2020-09-24 18:24:33,173 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 670 transitions. Word has length 48 [2020-09-24 18:24:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:24:33,173 INFO L479 AbstractCegarLoop]: Abstraction has 543 states and 670 transitions. [2020-09-24 18:24:33,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:24:33,174 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 670 transitions. [2020-09-24 18:24:33,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-24 18:24:33,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:24:33,183 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:24:33,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:24:33,184 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:24:33,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:24:33,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1595093336, now seen corresponding path program 1 times [2020-09-24 18:24:33,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:24:33,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593143307] [2020-09-24 18:24:33,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:24:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:24:33,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:33,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:33,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:33,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:34,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:35,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:35,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:24:35,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-09-24 18:24:35,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:24:35,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2150 [2020-09-24 18:24:35,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:24:35,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:24:35,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-09-24 18:24:35,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-24 18:24:35,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:24:35,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:24:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:24:35,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:35,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:24:35,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:24:35,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:24:35,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 18:24:35,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:24:35,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:24:35,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:24:35,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:24:35,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:24:35,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:24:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:24:35,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:35,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:24:35,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 18:24:35,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:24:35,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-24 18:24:35,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:24:35,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:24:35,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:24:35,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-24 18:24:35,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:24:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:24:35,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593143307] [2020-09-24 18:24:35,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:24:35,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:24:35,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739926223] [2020-09-24 18:24:35,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:24:35,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:24:35,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:24:35,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:24:35,659 INFO L87 Difference]: Start difference. First operand 543 states and 670 transitions. Second operand 5 states. [2020-09-24 18:24:37,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:24:37,435 INFO L93 Difference]: Finished difference Result 1235 states and 1577 transitions. [2020-09-24 18:24:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:24:37,436 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-09-24 18:24:37,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:24:37,442 INFO L225 Difference]: With dead ends: 1235 [2020-09-24 18:24:37,442 INFO L226 Difference]: Without dead ends: 707 [2020-09-24 18:24:37,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:24:37,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2020-09-24 18:24:37,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 697. [2020-09-24 18:24:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-09-24 18:24:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 855 transitions. [2020-09-24 18:24:37,505 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 855 transitions. Word has length 128 [2020-09-24 18:24:37,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:24:37,509 INFO L479 AbstractCegarLoop]: Abstraction has 697 states and 855 transitions. [2020-09-24 18:24:37,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:24:37,511 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 855 transitions. [2020-09-24 18:24:37,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-09-24 18:24:37,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:24:37,521 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:24:37,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:24:37,523 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:24:37,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:24:37,524 INFO L82 PathProgramCache]: Analyzing trace with hash 387326765, now seen corresponding path program 1 times [2020-09-24 18:24:37,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:24:37,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378124143] [2020-09-24 18:24:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:24:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:24:37,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:37,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:37,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:38,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:38,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:40,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:40,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:40,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:42,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:24:42,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-24 18:24:42,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 18:24:42,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-09-24 18:24:42,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:24:42,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:24:42,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-09-24 18:24:42,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 18:24:42,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:24:42,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:24:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:24:42,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:42,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:24:42,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:24:42,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:24:42,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 18:24:42,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:24:42,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:24:42,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:24:42,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:24:42,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:24:42,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:24:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:24:42,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:42,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:24:42,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 18:24:42,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:24:42,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-24 18:24:42,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:24:42,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:24:42,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:24:42,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-09-24 18:24:42,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:24:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:24:42,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378124143] [2020-09-24 18:24:42,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:24:42,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:24:42,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162242041] [2020-09-24 18:24:42,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:24:42,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:24:42,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:24:42,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:24:42,907 INFO L87 Difference]: Start difference. First operand 697 states and 855 transitions. Second operand 5 states. [2020-09-24 18:24:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:24:44,955 INFO L93 Difference]: Finished difference Result 1875 states and 2393 transitions. [2020-09-24 18:24:44,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:24:44,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2020-09-24 18:24:44,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:24:44,997 INFO L225 Difference]: With dead ends: 1875 [2020-09-24 18:24:44,997 INFO L226 Difference]: Without dead ends: 1193 [2020-09-24 18:24:45,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:24:45,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2020-09-24 18:24:45,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1153. [2020-09-24 18:24:45,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2020-09-24 18:24:45,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1467 transitions. [2020-09-24 18:24:45,055 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1467 transitions. Word has length 137 [2020-09-24 18:24:45,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:24:45,056 INFO L479 AbstractCegarLoop]: Abstraction has 1153 states and 1467 transitions. [2020-09-24 18:24:45,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:24:45,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1467 transitions. [2020-09-24 18:24:45,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-09-24 18:24:45,062 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:24:45,062 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:24:45,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:24:45,067 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:24:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:24:45,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1594398577, now seen corresponding path program 1 times [2020-09-24 18:24:45,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:24:45,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442121710] [2020-09-24 18:24:45,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:24:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:24:45,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:45,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:45,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:46,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:47,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:49,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:24:49,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-09-24 18:24:49,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:24:49,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4389 [2020-09-24 18:24:49,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:24:49,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:24:49,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-09-24 18:24:49,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 18:24:49,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:24:49,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:24:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:24:49,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:49,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:24:49,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:24:49,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:24:49,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:24:49,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:24:49,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:24:49,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:24:49,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:24:49,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:24:49,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:24:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:24:49,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:49,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:24:49,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-09-24 18:24:49,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:24:49,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-09-24 18:24:49,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:24:49,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:24:49,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:24:49,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-09-24 18:24:49,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:24:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:24:49,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442121710] [2020-09-24 18:24:49,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:24:49,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:24:49,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130079623] [2020-09-24 18:24:49,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:24:49,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:24:49,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:24:49,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:24:49,842 INFO L87 Difference]: Start difference. First operand 1153 states and 1467 transitions. Second operand 5 states. [2020-09-24 18:24:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:24:51,990 INFO L93 Difference]: Finished difference Result 3140 states and 4127 transitions. [2020-09-24 18:24:51,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:24:51,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2020-09-24 18:24:51,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:24:52,005 INFO L225 Difference]: With dead ends: 3140 [2020-09-24 18:24:52,006 INFO L226 Difference]: Without dead ends: 2002 [2020-09-24 18:24:52,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:24:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2020-09-24 18:24:52,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1948. [2020-09-24 18:24:52,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1948 states. [2020-09-24 18:24:52,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 2540 transitions. [2020-09-24 18:24:52,087 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 2540 transitions. Word has length 170 [2020-09-24 18:24:52,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:24:52,088 INFO L479 AbstractCegarLoop]: Abstraction has 1948 states and 2540 transitions. [2020-09-24 18:24:52,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:24:52,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 2540 transitions. [2020-09-24 18:24:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-09-24 18:24:52,093 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:24:52,093 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:24:52,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:24:52,094 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:24:52,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:24:52,094 INFO L82 PathProgramCache]: Analyzing trace with hash -198517872, now seen corresponding path program 1 times [2020-09-24 18:24:52,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:24:52,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991085045] [2020-09-24 18:24:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:24:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:24:52,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:52,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:52,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:53,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:54,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:56,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:24:56,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-09-24 18:24:56,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:24:56,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4290 [2020-09-24 18:24:56,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:24:56,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:24:56,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 142 [2020-09-24 18:24:56,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 18:24:56,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:24:56,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:24:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:24:56,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:56,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:24:56,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:24:56,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:24:56,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 18:24:56,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:24:56,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:24:56,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:24:56,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:24:56,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:24:56,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:24:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:24:56,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:56,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:24:56,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-09-24 18:24:56,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:24:56,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-09-24 18:24:56,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:24:56,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:24:56,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:24:56,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-09-24 18:24:56,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:24:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:24:56,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991085045] [2020-09-24 18:24:56,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:24:56,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:24:56,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319416343] [2020-09-24 18:24:56,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:24:56,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:24:56,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:24:56,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:24:56,872 INFO L87 Difference]: Start difference. First operand 1948 states and 2540 transitions. Second operand 5 states. [2020-09-24 18:24:59,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:24:59,049 INFO L93 Difference]: Finished difference Result 4735 states and 6309 transitions. [2020-09-24 18:24:59,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:24:59,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 175 [2020-09-24 18:24:59,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:24:59,068 INFO L225 Difference]: With dead ends: 4735 [2020-09-24 18:24:59,068 INFO L226 Difference]: Without dead ends: 2802 [2020-09-24 18:24:59,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:24:59,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2020-09-24 18:24:59,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 2751. [2020-09-24 18:24:59,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2751 states. [2020-09-24 18:24:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 3645 transitions. [2020-09-24 18:24:59,187 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 3645 transitions. Word has length 175 [2020-09-24 18:24:59,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:24:59,187 INFO L479 AbstractCegarLoop]: Abstraction has 2751 states and 3645 transitions. [2020-09-24 18:24:59,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:24:59,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 3645 transitions. [2020-09-24 18:24:59,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-09-24 18:24:59,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:24:59,200 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:24:59,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:24:59,201 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:24:59,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:24:59,201 INFO L82 PathProgramCache]: Analyzing trace with hash -717885772, now seen corresponding path program 1 times [2020-09-24 18:24:59,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:24:59,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569775856] [2020-09-24 18:24:59,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:24:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:24:59,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:59,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:59,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:00,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:00,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:03,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:03,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:04,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:04,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:04,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 286 [2020-09-24 18:25:04,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 18:25:04,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-24 18:25:04,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:04,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:25:04,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 106 [2020-09-24 18:25:04,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-09-24 18:25:04,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:04,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:25:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:04,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:04,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:04,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:25:04,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:04,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:25:04,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:04,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:25:04,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:04,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:25:04,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:04,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:25:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:04,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:04,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:04,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 18:25:04,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:04,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-09-24 18:25:04,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:04,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:25:04,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:04,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-24 18:25:04,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:04,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-24 18:25:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:04,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:04,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:04,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-09-24 18:25:04,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:04,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-09-24 18:25:04,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:04,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:25:04,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:25:04,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-09-24 18:25:04,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 146 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:25:05,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569775856] [2020-09-24 18:25:05,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:25:05,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:25:05,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058507457] [2020-09-24 18:25:05,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:25:05,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:25:05,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:25:05,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:25:05,089 INFO L87 Difference]: Start difference. First operand 2751 states and 3645 transitions. Second operand 7 states. [2020-09-24 18:25:07,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:25:07,409 INFO L93 Difference]: Finished difference Result 5585 states and 7483 transitions. [2020-09-24 18:25:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 18:25:07,410 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 273 [2020-09-24 18:25:07,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:25:07,424 INFO L225 Difference]: With dead ends: 5585 [2020-09-24 18:25:07,424 INFO L226 Difference]: Without dead ends: 2009 [2020-09-24 18:25:07,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:25:07,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2020-09-24 18:25:07,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1927. [2020-09-24 18:25:07,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1927 states. [2020-09-24 18:25:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2253 transitions. [2020-09-24 18:25:07,510 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2253 transitions. Word has length 273 [2020-09-24 18:25:07,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:25:07,510 INFO L479 AbstractCegarLoop]: Abstraction has 1927 states and 2253 transitions. [2020-09-24 18:25:07,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:25:07,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2253 transitions. [2020-09-24 18:25:07,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-09-24 18:25:07,520 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:25:07,520 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:25:07,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 18:25:07,521 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:25:07,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:25:07,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1838554940, now seen corresponding path program 1 times [2020-09-24 18:25:07,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:25:07,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925172623] [2020-09-24 18:25:07,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:25:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:07,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:07,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:07,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:10,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:10,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:10,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:11,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:12,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:12,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-09-24 18:25:12,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 18:25:12,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 18:25:12,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:12,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:25:12,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-09-24 18:25:12,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-09-24 18:25:12,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:12,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:25:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:12,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:12,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:12,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:25:12,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:12,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:25:12,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:12,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:25:12,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:12,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:25:12,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:12,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:25:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:12,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:12,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:12,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-24 18:25:12,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:12,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-09-24 18:25:12,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:12,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:25:12,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:12,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-24 18:25:12,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:12,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-09-24 18:25:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:12,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:13,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:13,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-09-24 18:25:13,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:13,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-09-24 18:25:13,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:13,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:25:13,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:25:13,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-09-24 18:25:13,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:25:13,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925172623] [2020-09-24 18:25:13,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:25:13,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:25:13,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181715173] [2020-09-24 18:25:13,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:25:13,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:25:13,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:25:13,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:25:13,204 INFO L87 Difference]: Start difference. First operand 1927 states and 2253 transitions. Second operand 7 states.