/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 SequenceOfStatements --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/break-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:20:33,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:20:33,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:20:33,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:20:33,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:20:33,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:20:33,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:20:33,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:20:33,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:20:33,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:20:33,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:20:33,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:20:33,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:20:33,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:20:33,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:20:33,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:20:33,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:20:33,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:20:33,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:20:33,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:20:33,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:20:33,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:20:33,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:20:33,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:20:33,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:20:33,810 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:20:33,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:20:33,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:20:33,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:20:33,813 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:20:33,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:20:33,814 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:20:33,815 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:20:33,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:20:33,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:20:33,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:20:33,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:20:33,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:20:33,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:20:33,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:20:33,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:20:33,822 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 [2020-10-12 10:20:33,861 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:20:33,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:20:33,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:20:33,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:20:33,864 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:20:33,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:20:33,865 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:20:33,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:20:33,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:20:33,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:20:33,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:20:33,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:20:33,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:20:33,867 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:20:33,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:20:33,867 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:20:33,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:20:33,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:20:33,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:20:33,868 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:20:33,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:20:33,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:20:33,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:20:33,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:20:33,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:20:33,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:20:33,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:20:33,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:20:33,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:20:33,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:20:34,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:20:34,172 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:20:34,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:20:34,175 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:20:34,176 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:20:34,176 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/break-2.i [2020-10-12 10:20:34,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99216b490/295b3f94838743d8b90195f244487f41/FLAG217cc5948 [2020-10-12 10:20:34,677 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:20:34,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/break-2.i [2020-10-12 10:20:34,685 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99216b490/295b3f94838743d8b90195f244487f41/FLAG217cc5948 [2020-10-12 10:20:35,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99216b490/295b3f94838743d8b90195f244487f41 [2020-10-12 10:20:35,091 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:20:35,093 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:20:35,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:20:35,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:20:35,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:20:35,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:20:35" (1/1) ... [2020-10-12 10:20:35,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b23df30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:20:35, skipping insertion in model container [2020-10-12 10:20:35,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:20:35" (1/1) ... [2020-10-12 10:20:35,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:20:35,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:20:35,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:20:51,961 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:20:51,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:20:52,005 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:20:52,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:20:52 WrapperNode [2020-10-12 10:20:52,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:20:52,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:20:52,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:20:52,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:20:52,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:20:52" (1/1) ... [2020-10-12 10:20:52,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:20:52" (1/1) ... [2020-10-12 10:20:52,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:20:52" (1/1) ... [2020-10-12 10:20:52,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:20:52" (1/1) ... [2020-10-12 10:20:52,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:20:52" (1/1) ... [2020-10-12 10:20:52,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:20:52" (1/1) ... [2020-10-12 10:20:52,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:20:52" (1/1) ... [2020-10-12 10:20:52,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:20:52,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:20:52,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:20:52,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:20:52,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:20:52" (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 [2020-10-12 10:20:52,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:20:52,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:20:52,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:20:52,136 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:20:52,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:20:52,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:20:52,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:20:52,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:20:52,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:20:52,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:20:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:20:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:20:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:20:52,388 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:20:52,388 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 10:20:52,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:20:52 BoogieIcfgContainer [2020-10-12 10:20:52,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:20:52,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:20:52,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:20:52,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:20:52,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:20:35" (1/3) ... [2020-10-12 10:20:52,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6115486f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:20:52, skipping insertion in model container [2020-10-12 10:20:52,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:20:52" (2/3) ... [2020-10-12 10:20:52,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6115486f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:20:52, skipping insertion in model container [2020-10-12 10:20:52,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:20:52" (3/3) ... [2020-10-12 10:20:52,401 INFO L109 eAbstractionObserver]: Analyzing ICFG break-2.i [2020-10-12 10:20:52,412 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:20:52,419 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:20:52,434 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:20:52,460 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:20:52,460 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:20:52,460 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:20:52,460 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:20:52,461 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:20:52,461 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:20:52,461 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:20:52,461 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:20:52,480 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-12 10:20:52,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 10:20:52,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:52,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:52,488 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:52,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:52,495 INFO L82 PathProgramCache]: Analyzing trace with hash 547567586, now seen corresponding path program 1 times [2020-10-12 10:20:52,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:52,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726544046] [2020-10-12 10:20:52,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:52,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:52,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:52,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 10:20:52,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:52,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-12 10:20:52,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:52,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:20:52,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:20:52,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:20:52,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:20:52,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:52,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:52,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:52,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:52,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:52,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 10:20:52,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:52,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:20:52,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:52,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:20:52,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:20:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:20:52,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726544046] [2020-10-12 10:20:52,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:20:52,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 10:20:52,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876867988] [2020-10-12 10:20:52,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 10:20:52,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:52,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 10:20:52,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 10:20:52,855 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-10-12 10:20:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:53,020 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2020-10-12 10:20:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 10:20:53,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-12 10:20:53,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:53,033 INFO L225 Difference]: With dead ends: 54 [2020-10-12 10:20:53,033 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 10:20:53,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 10:20:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 10:20:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2020-10-12 10:20:53,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 10:20:53,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-12 10:20:53,080 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2020-10-12 10:20:53,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:53,080 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-12 10:20:53,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 10:20:53,081 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-12 10:20:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 10:20:53,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:53,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:53,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:20:53,082 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:53,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:53,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1443476915, now seen corresponding path program 1 times [2020-10-12 10:20:53,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:53,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124055696] [2020-10-12 10:20:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:53,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:53,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:53,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 10:20:53,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:53,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-12 10:20:53,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:53,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:20:53,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:20:53,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:20:53,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:53,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:53,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:53,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:53,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:53,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:53,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 10:20:53,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:53,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:20:53,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:53,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:20:53,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:20:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:20:53,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124055696] [2020-10-12 10:20:53,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:20:53,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 10:20:53,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414350375] [2020-10-12 10:20:53,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 10:20:53,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:53,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 10:20:53,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:20:53,392 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2020-10-12 10:20:53,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:53,502 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-10-12 10:20:53,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 10:20:53,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-12 10:20:53,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:53,504 INFO L225 Difference]: With dead ends: 41 [2020-10-12 10:20:53,504 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 10:20:53,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:20:53,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 10:20:53,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-10-12 10:20:53,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 10:20:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-12 10:20:53,514 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2020-10-12 10:20:53,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:53,514 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-12 10:20:53,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 10:20:53,514 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-12 10:20:53,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 10:20:53,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:53,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:53,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:20:53,516 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:53,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:53,516 INFO L82 PathProgramCache]: Analyzing trace with hash 2000433480, now seen corresponding path program 1 times [2020-10-12 10:20:53,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:53,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589671516] [2020-10-12 10:20:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:53,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:53,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:53,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:53,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:53,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 10:20:53,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:20:53,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-12 10:20:53,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:53,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:20:53,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:20:53,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 10:20:53,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:20:53,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:53,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:53,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:53,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:53,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:53,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 10:20:53,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:53,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:20:53,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:53,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:20:53,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:20:53,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589671516] [2020-10-12 10:20:53,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:53,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:20:53,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831091128] [2020-10-12 10:20:53,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:20:53,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:53,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:20:53,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:20:53,995 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 9 states. [2020-10-12 10:20:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:54,383 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-10-12 10:20:54,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 10:20:54,384 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-12 10:20:54,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:54,386 INFO L225 Difference]: With dead ends: 35 [2020-10-12 10:20:54,386 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 10:20:54,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:20:54,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 10:20:54,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-12 10:20:54,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 10:20:54,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-12 10:20:54,405 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 17 [2020-10-12 10:20:54,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:54,406 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-12 10:20:54,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:20:54,406 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-12 10:20:54,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 10:20:54,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:54,407 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:54,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:20:54,408 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:54,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:54,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1889472975, now seen corresponding path program 1 times [2020-10-12 10:20:54,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:54,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309727099] [2020-10-12 10:20:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:54,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:54,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:54,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:54,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 10:20:54,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:20:54,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-12 10:20:54,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:54,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 10:20:54,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 10:20:54,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 10:20:54,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:54,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:54,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:54,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:54,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:54,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:54,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:20:54,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:54,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:20:54,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:54,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:20:54,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:54,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 10:20:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:54,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:54,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:54,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:20:54,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:54,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:20:54,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:54,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:20:54,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:20:54,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:20:54,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:20:54,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309727099] [2020-10-12 10:20:54,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:20:54,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 10:20:54,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767862340] [2020-10-12 10:20:54,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 10:20:54,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:54,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 10:20:54,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:20:54,585 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-10-12 10:20:54,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:54,668 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-10-12 10:20:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:20:54,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-12 10:20:54,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:54,671 INFO L225 Difference]: With dead ends: 53 [2020-10-12 10:20:54,672 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 10:20:54,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:20:54,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 10:20:54,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-10-12 10:20:54,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 10:20:54,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-12 10:20:54,680 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2020-10-12 10:20:54,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:54,680 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-12 10:20:54,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 10:20:54,680 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-12 10:20:54,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 10:20:54,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:54,681 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:54,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:20:54,682 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:54,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:54,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1851994445, now seen corresponding path program 1 times [2020-10-12 10:20:54,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:54,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514600456] [2020-10-12 10:20:54,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:54,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:54,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:54,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:55,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:55,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 10:20:55,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:20:55,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-12 10:20:55,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:55,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:20:55,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:20:55,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:20:55,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:55,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:55,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:55,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:55,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:55,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:55,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:20:55,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:55,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:20:55,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:55,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:20:55,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:55,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-12 10:20:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:55,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:55,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:55,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:20:55,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:55,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 10:20:55,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:20:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:20:55,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:20:55,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514600456] [2020-10-12 10:20:55,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:55,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:20:55,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473649362] [2020-10-12 10:20:55,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:20:55,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:55,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:20:55,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:20:55,364 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2020-10-12 10:20:56,356 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-12 10:20:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:56,690 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-12 10:20:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:20:56,692 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-12 10:20:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:56,693 INFO L225 Difference]: With dead ends: 60 [2020-10-12 10:20:56,693 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 10:20:56,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:20:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 10:20:56,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-12 10:20:56,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 10:20:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-12 10:20:56,704 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2020-10-12 10:20:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:56,704 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-12 10:20:56,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:20:56,705 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-12 10:20:56,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 10:20:56,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:56,706 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:56,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:20:56,707 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:56,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:56,707 INFO L82 PathProgramCache]: Analyzing trace with hash -200190056, now seen corresponding path program 2 times [2020-10-12 10:20:56,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:56,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129076223] [2020-10-12 10:20:56,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:56,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:56,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:56,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:57,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:57,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:57,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 10:20:57,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:20:57,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 575 [2020-10-12 10:20:57,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:57,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:20:57,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:20:57,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:20:57,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:20:57,644 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-12 10:20:59,984 WARN L193 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-12 10:21:00,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:00,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:00,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:00,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:00,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:00,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:21:00,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:00,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:21:00,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:00,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:21:00,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:21:00,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 10:21:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:00,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:00,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:00,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:21:00,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:00,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 10:21:00,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:00,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:21:00,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:00,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:21:00,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:21:00,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129076223] [2020-10-12 10:21:00,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:21:00,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:21:00,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674200761] [2020-10-12 10:21:00,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:21:00,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:00,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:21:00,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:21:00,303 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 16 states. [2020-10-12 10:21:00,983 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-12 10:21:01,462 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-12 10:21:02,074 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-12 10:21:02,395 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-12 10:21:02,657 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-12 10:21:03,055 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-12 10:21:03,661 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-12 10:21:04,205 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-12 10:21:04,683 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-12 10:21:05,536 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-12 10:21:05,862 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-12 10:21:06,816 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-12 10:21:06,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:06,966 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-12 10:21:06,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:21:06,966 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-10-12 10:21:06,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:06,967 INFO L225 Difference]: With dead ends: 59 [2020-10-12 10:21:06,967 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 10:21:06,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:21:06,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 10:21:06,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-12 10:21:06,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 10:21:06,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-12 10:21:06,975 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2020-10-12 10:21:06,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:06,975 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-12 10:21:06,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:21:06,975 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-12 10:21:06,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 10:21:06,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:06,976 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:06,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:21:06,977 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:06,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:06,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1264052371, now seen corresponding path program 3 times [2020-10-12 10:21:06,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:06,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940879024] [2020-10-12 10:21:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:06,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:07,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:07,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:07,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:07,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:07,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 10:21:07,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:21:07,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 893 [2020-10-12 10:21:07,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:07,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:21:07,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:21:07,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:21:07,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:09,178 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-12 10:21:09,820 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-12 10:21:11,487 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 135 DAG size of output: 82 [2020-10-12 10:21:12,835 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 129 DAG size of output: 80 [2020-10-12 10:21:13,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:13,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:13,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:13,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:13,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:13,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 10:21:13,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:13,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:21:13,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:13,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:21:13,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:13,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 10:21:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:13,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:13,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:13,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:21:13,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:13,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 10:21:13,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:13,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:21:13,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:13,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:21:13,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:21:13,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940879024] [2020-10-12 10:21:13,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:21:13,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:21:13,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833063308] [2020-10-12 10:21:13,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:21:13,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:13,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:21:13,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:21:13,477 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 18 states. [2020-10-12 10:21:15,693 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 126 DAG size of output: 100 [2020-10-12 10:21:17,259 WARN L193 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2020-10-12 10:21:18,946 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 125 DAG size of output: 102 [2020-10-12 10:21:19,674 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-12 10:21:20,384 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-12 10:21:21,335 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 103 [2020-10-12 10:21:23,696 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 122 DAG size of output: 102 [2020-10-12 10:21:25,874 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 120 DAG size of output: 100 [2020-10-12 10:21:27,239 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-10-12 10:21:31,099 WARN L193 SmtUtils]: Spent 2.93 s on a formula simplification. DAG size of input: 139 DAG size of output: 78 [2020-10-12 10:21:31,959 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-12 10:21:36,205 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 137 DAG size of output: 76 [2020-10-12 10:21:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:37,030 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-12 10:21:37,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:21:37,031 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-12 10:21:37,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:37,032 INFO L225 Difference]: With dead ends: 62 [2020-10-12 10:21:37,033 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 10:21:37,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:21:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 10:21:37,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-12 10:21:37,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 10:21:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-12 10:21:37,041 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 33 [2020-10-12 10:21:37,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:37,042 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-12 10:21:37,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:21:37,042 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-12 10:21:37,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 10:21:37,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:37,043 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:37,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:21:37,044 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:37,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:37,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1472630344, now seen corresponding path program 4 times [2020-10-12 10:21:37,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:37,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915414124] [2020-10-12 10:21:37,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:37,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:37,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:37,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:37,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:38,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:38,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 10:21:38,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:21:38,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1047 [2020-10-12 10:21:38,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:38,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:21:38,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:21:38,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:21:38,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:39,981 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-12 10:21:40,449 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-12 10:21:41,753 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 102 DAG size of output: 70 [2020-10-12 10:21:43,582 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 110 DAG size of output: 72 [2020-10-12 10:21:46,874 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 158 DAG size of output: 84 [2020-10-12 10:21:49,986 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 145 DAG size of output: 79 [2020-10-12 10:21:50,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:50,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:50,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:50,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:50,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:50,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 10:21:50,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:50,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:21:50,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:50,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:21:50,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:50,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 10:21:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:50,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:50,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:50,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:21:50,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:50,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 10:21:50,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:50,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:21:50,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:50,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:21:50,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:21:50,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915414124] [2020-10-12 10:21:50,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:21:50,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:21:50,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000583472] [2020-10-12 10:21:50,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:21:50,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:50,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:21:50,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:21:50,750 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-10-12 10:21:55,354 WARN L193 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 104 DAG size of output: 100 [2020-10-12 10:22:00,608 WARN L193 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2020-10-12 10:22:07,048 WARN L193 SmtUtils]: Spent 4.58 s on a formula simplification. DAG size of input: 112 DAG size of output: 105 [2020-10-12 10:22:11,886 WARN L193 SmtUtils]: Spent 3.35 s on a formula simplification that was a NOOP. DAG size: 97 [2020-10-12 10:22:13,925 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 100 [2020-10-12 10:22:16,736 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 102 [2020-10-12 10:22:25,205 WARN L193 SmtUtils]: Spent 6.01 s on a formula simplification. DAG size of input: 110 DAG size of output: 103 [2020-10-12 10:22:31,854 WARN L193 SmtUtils]: Spent 5.38 s on a formula simplification. DAG size of input: 108 DAG size of output: 101 [2020-10-12 10:22:35,503 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 87 [2020-10-12 10:23:17,304 WARN L193 SmtUtils]: Spent 38.14 s on a formula simplification. DAG size of input: 148 DAG size of output: 117 [2020-10-12 10:23:23,050 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 100 [2020-10-12 10:23:28,414 WARN L193 SmtUtils]: Spent 3.61 s on a formula simplification. DAG size of input: 103 DAG size of output: 102 [2020-10-12 10:24:17,674 WARN L193 SmtUtils]: Spent 40.21 s on a formula simplification. DAG size of input: 146 DAG size of output: 115 [2020-10-12 10:24:23,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:24:23,051 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-12 10:24:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:24:23,057 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2020-10-12 10:24:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:24:23,058 INFO L225 Difference]: With dead ends: 65 [2020-10-12 10:24:23,058 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 10:24:23,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 138.0s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:24:23,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 10:24:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-12 10:24:23,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 10:24:23,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-12 10:24:23,068 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2020-10-12 10:24:23,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:24:23,068 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-12 10:24:23,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:24:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-12 10:24:23,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:24:23,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:24:23,070 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:24:23,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:24:23,070 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:24:23,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:24:23,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1376787059, now seen corresponding path program 5 times [2020-10-12 10:24:23,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:24:23,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124099187] [2020-10-12 10:24:23,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:24:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:24:23,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:24:23,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:24:23,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:24:24,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:24:24,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:24:24,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:24:24,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:24:24,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1259 [2020-10-12 10:24:24,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:24:24,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:24:24,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 10:24:24,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 10:24:24,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:24:29,092 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-12 10:24:30,065 WARN L193 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-12 10:24:30,857 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-12 10:24:33,193 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-10-12 10:24:35,969 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-12 10:24:42,902 WARN L193 SmtUtils]: Spent 4.96 s on a formula simplification. DAG size of input: 125 DAG size of output: 87 [2020-10-12 10:24:50,533 WARN L193 SmtUtils]: Spent 5.60 s on a formula simplification. DAG size of input: 127 DAG size of output: 90