/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=NARROWEST --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/loop-acceleration/array_3-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:42:51,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:42:51,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:42:51,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:42:51,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:42:51,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:42:51,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:42:51,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:42:51,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:42:51,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:42:51,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:42:51,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:42:51,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:42:51,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:42:51,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:42:51,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:42:51,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:42:51,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:42:51,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:42:51,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:42:51,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:42:51,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:42:51,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:42:51,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:42:51,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:42:51,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:42:51,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:42:51,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:42:51,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:42:51,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:42:51,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:42:51,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:42:51,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:42:51,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:42:51,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:42:51,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:42:51,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:42:51,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:42:51,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:42:51,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:42:51,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:42:51,698 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 [2020-10-13 10:42:51,720 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:42:51,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:42:51,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:42:51,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:42:51,721 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:42:51,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:42:51,722 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:42:51,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:42:51,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:42:51,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:42:51,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:42:51,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:42:51,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:42:51,723 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:42:51,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:42:51,724 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:42:51,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:42:51,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:42:51,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:42:51,724 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:42:51,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:42:51,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:42:51,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:42:51,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:42:51,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:42:51,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:42:51,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:42:51,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:42:51,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:42:51,726 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:42:52,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:42:52,049 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:42:52,053 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:42:52,054 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:42:52,055 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:42:52,055 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i [2020-10-13 10:42:52,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f8dd878f/e6ac765770184bf4b6c92b9b100c0a96/FLAGcf169d627 [2020-10-13 10:42:52,552 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:42:52,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-2.i [2020-10-13 10:42:52,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f8dd878f/e6ac765770184bf4b6c92b9b100c0a96/FLAGcf169d627 [2020-10-13 10:42:52,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f8dd878f/e6ac765770184bf4b6c92b9b100c0a96 [2020-10-13 10:42:52,962 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:42:52,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:42:52,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:42:52,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:42:52,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:42:52,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:42:52" (1/1) ... [2020-10-13 10:42:52,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e8bb43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:52, skipping insertion in model container [2020-10-13 10:42:52,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:42:52" (1/1) ... [2020-10-13 10:42:52,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:42:53,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:42:53,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:42:53,211 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:42:53,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:42:53,253 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:42:53,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:53 WrapperNode [2020-10-13 10:42:53,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:42:53,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:42:53,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:42:53,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:42:53,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:53" (1/1) ... [2020-10-13 10:42:53,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:53" (1/1) ... [2020-10-13 10:42:53,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:53" (1/1) ... [2020-10-13 10:42:53,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:53" (1/1) ... [2020-10-13 10:42:53,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:53" (1/1) ... [2020-10-13 10:42:53,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:53" (1/1) ... [2020-10-13 10:42:53,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:53" (1/1) ... [2020-10-13 10:42:53,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:42:53,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:42:53,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:42:53,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:42:53,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:53" (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 [2020-10-13 10:42:53,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:42:53,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:42:53,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:42:53,456 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:42:53,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:42:53,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:42:53,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:42:53,456 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:42:53,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:42:53,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:42:53,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:42:53,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:42:53,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:42:53,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:42:53,683 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:42:53,683 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 10:42:53,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:42:53 BoogieIcfgContainer [2020-10-13 10:42:53,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:42:53,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:42:53,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:42:53,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:42:53,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:42:52" (1/3) ... [2020-10-13 10:42:53,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7323ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:42:53, skipping insertion in model container [2020-10-13 10:42:53,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:53" (2/3) ... [2020-10-13 10:42:53,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7323ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:42:53, skipping insertion in model container [2020-10-13 10:42:53,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:42:53" (3/3) ... [2020-10-13 10:42:53,696 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2020-10-13 10:42:53,723 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:42:53,741 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:42:53,770 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:42:53,797 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:42:53,797 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:42:53,797 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:42:53,798 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:42:53,798 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:42:53,798 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:42:53,798 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:42:53,798 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:42:53,824 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-13 10:42:53,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 10:42:53,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:53,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:53,836 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:53,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:53,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1584649929, now seen corresponding path program 1 times [2020-10-13 10:42:53,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:53,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293145822] [2020-10-13 10:42:53,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:53,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:54,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:54,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:54,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:54,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:42:54,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:42:54,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-13 10:42:54,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:54,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:54,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:42:54,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:54,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:42:54,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:54,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:54,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:54,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:54,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:54,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:42:54,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:54,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:54,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:54,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:54,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:54,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293145822] [2020-10-13 10:42:54,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:54,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:54,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657036927] [2020-10-13 10:42:54,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:54,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:54,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:54,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:54,340 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-13 10:42:54,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:54,519 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-10-13 10:42:54,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:54,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-13 10:42:54,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:54,537 INFO L225 Difference]: With dead ends: 42 [2020-10-13 10:42:54,537 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 10:42:54,542 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 [2020-10-13 10:42:54,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 10:42:54,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-13 10:42:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-13 10:42:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-13 10:42:54,595 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-10-13 10:42:54,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:54,596 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-13 10:42:54,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:54,596 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-13 10:42:54,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:42:54,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:54,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:54,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:42:54,601 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:54,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:54,602 INFO L82 PathProgramCache]: Analyzing trace with hash -963606854, now seen corresponding path program 1 times [2020-10-13 10:42:54,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:54,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305545946] [2020-10-13 10:42:54,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:54,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:54,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:54,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:54,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:42:54,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:54,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-13 10:42:54,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:54,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:54,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:54,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:42:54,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:54,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:54,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:54,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:54,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:54,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:54,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:42:54,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:54,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:54,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:54,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305545946] [2020-10-13 10:42:54,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:54,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:42:54,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599453122] [2020-10-13 10:42:54,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:42:54,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:54,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:42:54,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:42:54,907 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-10-13 10:42:54,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:54,983 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-10-13 10:42:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:42:54,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 10:42:54,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:54,986 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:42:54,987 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 10:42:54,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:42:54,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 10:42:54,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2020-10-13 10:42:54,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 10:42:54,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-13 10:42:54,996 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-13 10:42:54,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:54,996 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-13 10:42:54,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:42:54,996 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-13 10:42:54,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:42:54,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:54,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:54,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:42:54,998 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:54,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:54,999 INFO L82 PathProgramCache]: Analyzing trace with hash -544788776, now seen corresponding path program 1 times [2020-10-13 10:42:54,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:54,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134673884] [2020-10-13 10:42:55,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:55,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:55,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:42:55,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:55,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-13 10:42:55,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:55,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:42:55,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:55,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:42:55,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:55,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:55,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:55,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:55,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:55,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:42:55,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:55,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:55,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:55,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:55,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:55,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134673884] [2020-10-13 10:42:55,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:55,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:42:55,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097718578] [2020-10-13 10:42:55,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:42:55,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:55,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:42:55,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:42:55,279 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-10-13 10:42:55,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:55,356 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-10-13 10:42:55,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:42:55,357 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-13 10:42:55,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:55,358 INFO L225 Difference]: With dead ends: 42 [2020-10-13 10:42:55,358 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 10:42:55,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:42:55,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 10:42:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 21. [2020-10-13 10:42:55,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:42:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 10:42:55,365 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2020-10-13 10:42:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:55,366 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 10:42:55,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:42:55,366 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 10:42:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:42:55,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:55,367 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:55,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:42:55,368 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:55,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:55,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1787541642, now seen corresponding path program 2 times [2020-10-13 10:42:55,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:55,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909250275] [2020-10-13 10:42:55,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:55,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:55,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:42:55,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:55,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-13 10:42:55,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:55,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:42:55,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:55,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:42:55,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:55,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:55,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:55,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:55,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:55,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:42:55,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:55,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:55,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:55,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:55,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:55,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909250275] [2020-10-13 10:42:55,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:55,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:42:55,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199759603] [2020-10-13 10:42:55,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:42:55,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:55,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:42:55,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:42:55,594 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-13 10:42:55,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:55,687 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2020-10-13 10:42:55,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:42:55,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 10:42:55,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:55,690 INFO L225 Difference]: With dead ends: 49 [2020-10-13 10:42:55,690 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 10:42:55,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:42:55,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 10:42:55,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2020-10-13 10:42:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:42:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-13 10:42:55,697 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2020-10-13 10:42:55,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:55,697 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-13 10:42:55,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:42:55,698 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-13 10:42:55,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:42:55,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:55,699 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:55,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:42:55,700 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:55,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:55,700 INFO L82 PathProgramCache]: Analyzing trace with hash -2072137580, now seen corresponding path program 3 times [2020-10-13 10:42:55,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:55,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848656484] [2020-10-13 10:42:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:55,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:56,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:42:56,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:56,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-13 10:42:56,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:56,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:42:56,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:56,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:42:56,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:56,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:56,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:56,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:56,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:56,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:42:56,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:56,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:56,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:56,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:56,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:56,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848656484] [2020-10-13 10:42:56,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:56,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:42:56,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426153543] [2020-10-13 10:42:56,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:42:56,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:56,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:42:56,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:42:56,100 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2020-10-13 10:42:56,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:56,205 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2020-10-13 10:42:56,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:42:56,206 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-13 10:42:56,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:56,208 INFO L225 Difference]: With dead ends: 56 [2020-10-13 10:42:56,208 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:42:56,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:42:56,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:42:56,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 25. [2020-10-13 10:42:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 10:42:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-13 10:42:56,215 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-10-13 10:42:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:56,216 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-13 10:42:56,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:42:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-13 10:42:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:42:56,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:56,217 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:56,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:42:56,218 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:56,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:56,218 INFO L82 PathProgramCache]: Analyzing trace with hash -690927054, now seen corresponding path program 4 times [2020-10-13 10:42:56,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:56,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291396155] [2020-10-13 10:42:56,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:56,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:56,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:42:56,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:56,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-13 10:42:56,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:56,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:42:56,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 10:42:56,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:42:56,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:56,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:56,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:56,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:56,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:56,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:56,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:56,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:56,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:56,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:56,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 10:42:56,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291396155] [2020-10-13 10:42:56,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:56,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:42:56,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175900497] [2020-10-13 10:42:56,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:42:56,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:56,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:42:56,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:42:56,634 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-13 10:42:56,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:56,734 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-13 10:42:56,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:42:56,734 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-13 10:42:56,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:56,735 INFO L225 Difference]: With dead ends: 34 [2020-10-13 10:42:56,735 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 10:42:56,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:42:56,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 10:42:56,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-13 10:42:56,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 10:42:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-13 10:42:56,742 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-10-13 10:42:56,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:56,742 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-13 10:42:56,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:42:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-13 10:42:56,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:42:56,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:56,744 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:56,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:42:56,744 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:56,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:56,745 INFO L82 PathProgramCache]: Analyzing trace with hash 304603949, now seen corresponding path program 1 times [2020-10-13 10:42:56,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:56,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578702795] [2020-10-13 10:42:56,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:56,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:57,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:57,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:42:57,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:57,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 458 [2020-10-13 10:42:57,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:57,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:42:57,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:57,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:42:57,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:57,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:57,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:57,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:57,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:57,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:57,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:42:57,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:57,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:57,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:57,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:57,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:42:57,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578702795] [2020-10-13 10:42:57,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:57,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:42:57,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534847217] [2020-10-13 10:42:57,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:42:57,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:57,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:42:57,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:42:57,300 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states. [2020-10-13 10:42:57,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:57,431 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2020-10-13 10:42:57,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:42:57,432 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-13 10:42:57,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:57,433 INFO L225 Difference]: With dead ends: 65 [2020-10-13 10:42:57,433 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 10:42:57,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:42:57,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 10:42:57,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2020-10-13 10:42:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 10:42:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-13 10:42:57,450 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 27 [2020-10-13 10:42:57,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:57,451 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-13 10:42:57,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:42:57,451 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-13 10:42:57,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:42:57,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:57,452 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:57,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:42:57,453 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:57,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:57,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1505578571, now seen corresponding path program 2 times [2020-10-13 10:42:57,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:57,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425173351] [2020-10-13 10:42:57,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:57,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:57,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:58,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:58,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:42:58,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:58,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 586 [2020-10-13 10:42:58,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:58,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:42:58,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:58,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:42:58,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:58,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:58,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:58,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:58,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:58,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:58,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:58,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:58,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:58,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:58,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:58,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:42:58,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425173351] [2020-10-13 10:42:58,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:58,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:42:58,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337937053] [2020-10-13 10:42:58,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:42:58,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:58,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:42:58,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:42:58,140 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 9 states. [2020-10-13 10:42:58,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:58,291 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2020-10-13 10:42:58,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:42:58,292 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-13 10:42:58,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:58,293 INFO L225 Difference]: With dead ends: 72 [2020-10-13 10:42:58,294 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 10:42:58,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:42:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 10:42:58,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2020-10-13 10:42:58,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 10:42:58,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-13 10:42:58,304 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-10-13 10:42:58,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:58,307 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-13 10:42:58,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:42:58,308 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-13 10:42:58,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:42:58,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:58,311 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:58,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:42:58,312 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:58,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:58,312 INFO L82 PathProgramCache]: Analyzing trace with hash 295987689, now seen corresponding path program 3 times [2020-10-13 10:42:58,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:58,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407230033] [2020-10-13 10:42:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:58,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:58,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:58,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:58,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:42:58,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:58,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-13 10:42:58,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:58,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:42:58,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:42:58,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:42:58,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:58,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:58,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:58,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:58,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:58,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:58,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:58,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:58,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:58,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:58,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:58,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:42:58,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407230033] [2020-10-13 10:42:58,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:58,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:42:58,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103759681] [2020-10-13 10:42:58,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:42:58,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:58,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:42:58,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:42:58,814 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 7 states. [2020-10-13 10:42:58,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:58,917 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-10-13 10:42:58,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:42:58,918 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-13 10:42:58,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:58,919 INFO L225 Difference]: With dead ends: 42 [2020-10-13 10:42:58,919 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 10:42:58,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:42:58,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 10:42:58,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-13 10:42:58,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 10:42:58,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-13 10:42:58,924 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 31 [2020-10-13 10:42:58,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:58,925 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-13 10:42:58,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:42:58,925 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-13 10:42:58,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:42:58,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:58,926 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:58,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:42:58,926 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:58,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:58,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1785089892, now seen corresponding path program 4 times [2020-10-13 10:42:58,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:58,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945678061] [2020-10-13 10:42:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:58,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:58,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:59,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:59,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:42:59,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:59,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-13 10:42:59,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:42:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:59,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:42:59,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:59,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:59,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:59,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:59,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:59,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:59,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:59,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:59,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:59,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:59,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:59,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 10:42:59,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945678061] [2020-10-13 10:42:59,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:59,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:42:59,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045371176] [2020-10-13 10:42:59,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:42:59,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:59,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:42:59,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:42:59,867 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 10 states. [2020-10-13 10:42:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:59,997 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2020-10-13 10:42:59,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:42:59,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-13 10:42:59,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:59,999 INFO L225 Difference]: With dead ends: 82 [2020-10-13 10:42:59,999 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 10:43:00,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:43:00,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 10:43:00,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2020-10-13 10:43:00,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 10:43:00,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-13 10:43:00,006 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 35 [2020-10-13 10:43:00,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:00,006 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-13 10:43:00,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:43:00,007 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-13 10:43:00,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:43:00,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:00,008 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:00,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:43:00,009 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:00,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1197849730, now seen corresponding path program 5 times [2020-10-13 10:43:00,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:00,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802895042] [2020-10-13 10:43:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:00,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:00,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:00,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:00,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:43:00,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:00,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 673 [2020-10-13 10:43:00,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:00,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:43:00,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:00,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:43:00,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:00,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:00,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:00,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:00,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:00,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:00,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:00,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:00,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:00,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:00,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:00,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 10:43:00,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802895042] [2020-10-13 10:43:00,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:00,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:43:00,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217560191] [2020-10-13 10:43:00,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:43:00,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:00,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:43:00,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:43:00,809 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 11 states. [2020-10-13 10:43:01,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:01,025 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2020-10-13 10:43:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:43:01,027 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-13 10:43:01,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:01,028 INFO L225 Difference]: With dead ends: 89 [2020-10-13 10:43:01,028 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 10:43:01,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:43:01,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 10:43:01,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2020-10-13 10:43:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 10:43:01,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-13 10:43:01,042 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 37 [2020-10-13 10:43:01,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:01,043 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-13 10:43:01,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:43:01,043 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-13 10:43:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:43:01,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:01,046 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:01,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:43:01,046 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:01,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:01,047 INFO L82 PathProgramCache]: Analyzing trace with hash -499230176, now seen corresponding path program 6 times [2020-10-13 10:43:01,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:01,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338292145] [2020-10-13 10:43:01,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:01,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:01,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:02,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:02,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:43:02,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:02,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1438 [2020-10-13 10:43:02,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:02,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:43:02,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 10:43:02,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:43:02,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:02,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:02,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:02,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:02,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:02,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:02,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:02,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:02,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:02,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:02,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:02,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 10:43:02,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338292145] [2020-10-13 10:43:02,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:02,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:43:02,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804467567] [2020-10-13 10:43:02,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:43:02,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:02,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:43:02,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:43:02,581 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 8 states. [2020-10-13 10:43:02,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:02,691 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-13 10:43:02,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:43:02,692 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-13 10:43:02,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:02,693 INFO L225 Difference]: With dead ends: 50 [2020-10-13 10:43:02,693 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 10:43:02,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:43:02,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 10:43:02,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-13 10:43:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 10:43:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-13 10:43:02,703 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 39 [2020-10-13 10:43:02,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:02,704 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-13 10:43:02,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:43:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-13 10:43:02,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:43:02,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:02,707 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:02,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:43:02,707 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:02,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:02,708 INFO L82 PathProgramCache]: Analyzing trace with hash 2140097563, now seen corresponding path program 7 times [2020-10-13 10:43:02,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:02,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107471511] [2020-10-13 10:43:02,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:02,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:02,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:04,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:04,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:43:04,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:04,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1693 [2020-10-13 10:43:04,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:04,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:43:04,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:04,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:43:04,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:04,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:04,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:04,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:04,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:04,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:04,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:04,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:04,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:04,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:04,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:04,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 10:43:04,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107471511] [2020-10-13 10:43:04,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:04,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:43:04,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240365357] [2020-10-13 10:43:04,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:43:04,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:04,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:43:04,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:43:04,557 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 12 states. [2020-10-13 10:43:04,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:04,734 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2020-10-13 10:43:04,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:43:04,735 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-13 10:43:04,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:04,736 INFO L225 Difference]: With dead ends: 99 [2020-10-13 10:43:04,736 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 10:43:04,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:43:04,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 10:43:04,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 46. [2020-10-13 10:43:04,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:43:04,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-13 10:43:04,753 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 43 [2020-10-13 10:43:04,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:04,753 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-13 10:43:04,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:43:04,754 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-13 10:43:04,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:43:04,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:04,755 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:04,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:43:04,757 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:04,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:04,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1893120825, now seen corresponding path program 8 times [2020-10-13 10:43:04,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:04,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867603618] [2020-10-13 10:43:04,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:04,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:04,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:05,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:05,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:43:05,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:05,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1105 [2020-10-13 10:43:05,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:05,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:43:05,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:05,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:43:05,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:05,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:06,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:06,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:06,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:06,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:06,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:06,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:06,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:06,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:06,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:06,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 10:43:06,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867603618] [2020-10-13 10:43:06,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:06,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:43:06,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593889021] [2020-10-13 10:43:06,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:43:06,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:06,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:43:06,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:43:06,011 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 13 states. [2020-10-13 10:43:06,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:06,156 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2020-10-13 10:43:06,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:43:06,157 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-13 10:43:06,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:06,158 INFO L225 Difference]: With dead ends: 106 [2020-10-13 10:43:06,158 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 10:43:06,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:43:06,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 10:43:06,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 48. [2020-10-13 10:43:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 10:43:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-13 10:43:06,164 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 45 [2020-10-13 10:43:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:06,164 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-13 10:43:06,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:43:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-13 10:43:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:43:06,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:06,165 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:06,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:43:06,166 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:06,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:06,166 INFO L82 PathProgramCache]: Analyzing trace with hash 771676887, now seen corresponding path program 9 times [2020-10-13 10:43:06,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:06,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014493059] [2020-10-13 10:43:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:06,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:06,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:07,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:07,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:43:07,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:07,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1160 [2020-10-13 10:43:07,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:07,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:43:07,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 10:43:07,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:43:07,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:07,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:07,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:07,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:07,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:07,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:07,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:07,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:07,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:07,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:07,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:07,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 10:43:07,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014493059] [2020-10-13 10:43:07,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:07,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:43:07,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128590098] [2020-10-13 10:43:07,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:43:07,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:07,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:43:07,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:43:07,434 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 9 states. [2020-10-13 10:43:07,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:07,603 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-13 10:43:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:43:07,604 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-13 10:43:07,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:07,605 INFO L225 Difference]: With dead ends: 58 [2020-10-13 10:43:07,605 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 10:43:07,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:43:07,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 10:43:07,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-13 10:43:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 10:43:07,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-13 10:43:07,611 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 47 [2020-10-13 10:43:07,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:07,611 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-13 10:43:07,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:43:07,611 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-13 10:43:07,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:43:07,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:07,612 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:07,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:43:07,613 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:07,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:07,614 INFO L82 PathProgramCache]: Analyzing trace with hash 19044690, now seen corresponding path program 10 times [2020-10-13 10:43:07,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:07,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531779087] [2020-10-13 10:43:07,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:07,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:07,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:09,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:09,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 10:43:09,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:09,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1513 [2020-10-13 10:43:09,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:09,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:43:09,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:09,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:43:09,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:09,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:09,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:09,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:09,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:09,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:09,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:09,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:09,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:09,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:09,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:09,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:43:09,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531779087] [2020-10-13 10:43:09,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:09,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:43:09,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571053736] [2020-10-13 10:43:09,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:43:09,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:09,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:43:09,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:43:09,288 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 14 states. [2020-10-13 10:43:09,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:09,478 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2020-10-13 10:43:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:43:09,479 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-13 10:43:09,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:09,480 INFO L225 Difference]: With dead ends: 116 [2020-10-13 10:43:09,480 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 10:43:09,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:43:09,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 10:43:09,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 54. [2020-10-13 10:43:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 10:43:09,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-13 10:43:09,486 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 51 [2020-10-13 10:43:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:09,486 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-13 10:43:09,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:43:09,487 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-13 10:43:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 10:43:09,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:09,487 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:09,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:43:09,488 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:09,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:09,488 INFO L82 PathProgramCache]: Analyzing trace with hash -946861456, now seen corresponding path program 11 times [2020-10-13 10:43:09,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:09,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002340489] [2020-10-13 10:43:09,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:09,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:09,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:10,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:10,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 10:43:10,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:10,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1445 [2020-10-13 10:43:10,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:10,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:43:10,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:10,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:43:10,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:11,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:11,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:11,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:11,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:11,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:11,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:11,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:11,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:11,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:11,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:11,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:43:11,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002340489] [2020-10-13 10:43:11,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:11,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:43:11,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955273503] [2020-10-13 10:43:11,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:43:11,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:11,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:43:11,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:43:11,174 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 15 states. [2020-10-13 10:43:11,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:11,436 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2020-10-13 10:43:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:43:11,437 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-13 10:43:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:11,438 INFO L225 Difference]: With dead ends: 123 [2020-10-13 10:43:11,438 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 10:43:11,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:43:11,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 10:43:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 56. [2020-10-13 10:43:11,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 10:43:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-13 10:43:11,444 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 53 [2020-10-13 10:43:11,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:11,445 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-13 10:43:11,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:43:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-13 10:43:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 10:43:11,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:11,447 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:11,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:43:11,447 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:11,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1469731826, now seen corresponding path program 12 times [2020-10-13 10:43:11,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:11,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907759443] [2020-10-13 10:43:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:11,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:11,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:14,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:14,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:43:14,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:14,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3041 [2020-10-13 10:43:14,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:14,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:43:14,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 10:43:14,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:43:14,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:14,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:14,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:14,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:14,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:14,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:14,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:14,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:14,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:14,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:14,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:14,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-13 10:43:14,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907759443] [2020-10-13 10:43:14,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:14,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:43:14,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823811758] [2020-10-13 10:43:14,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:43:14,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:14,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:43:14,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:43:14,603 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 10 states. [2020-10-13 10:43:14,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:14,737 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-10-13 10:43:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:43:14,738 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-13 10:43:14,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:14,739 INFO L225 Difference]: With dead ends: 66 [2020-10-13 10:43:14,739 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 10:43:14,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:43:14,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 10:43:14,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-13 10:43:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 10:43:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-13 10:43:14,748 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 55 [2020-10-13 10:43:14,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:14,752 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-13 10:43:14,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:43:14,752 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-13 10:43:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 10:43:14,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:14,753 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:14,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:43:14,753 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:14,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:14,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1556084489, now seen corresponding path program 13 times [2020-10-13 10:43:14,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:14,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983270235] [2020-10-13 10:43:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:14,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:14,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:16,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:16,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 10:43:16,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:16,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1956 [2020-10-13 10:43:16,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:16,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:43:16,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:16,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:43:16,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:16,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:16,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:16,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:16,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:16,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:16,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:16,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:16,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-13 10:43:16,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983270235] [2020-10-13 10:43:16,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:16,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:43:16,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334717937] [2020-10-13 10:43:16,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:43:16,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:16,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:43:16,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:43:16,908 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 16 states. [2020-10-13 10:43:17,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:17,084 INFO L93 Difference]: Finished difference Result 133 states and 163 transitions. [2020-10-13 10:43:17,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:43:17,085 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-10-13 10:43:17,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:17,086 INFO L225 Difference]: With dead ends: 133 [2020-10-13 10:43:17,086 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 10:43:17,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:43:17,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 10:43:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 62. [2020-10-13 10:43:17,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 10:43:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2020-10-13 10:43:17,094 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 59 [2020-10-13 10:43:17,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:17,095 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2020-10-13 10:43:17,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:43:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2020-10-13 10:43:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 10:43:17,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:17,096 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:17,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:43:17,096 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:17,097 INFO L82 PathProgramCache]: Analyzing trace with hash -80647641, now seen corresponding path program 14 times [2020-10-13 10:43:17,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:17,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711125422] [2020-10-13 10:43:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:17,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:17,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:19,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:19,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 10:43:19,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:19,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1948 [2020-10-13 10:43:19,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:43:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:43:19,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:19,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:19,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:19,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:19,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:19,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:19,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:19,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:19,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:19,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:19,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:19,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-13 10:43:19,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711125422] [2020-10-13 10:43:19,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:19,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:43:19,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716266880] [2020-10-13 10:43:19,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:43:19,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:19,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:43:19,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:43:19,257 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 17 states. [2020-10-13 10:43:19,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:19,439 INFO L93 Difference]: Finished difference Result 140 states and 172 transitions. [2020-10-13 10:43:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:43:19,440 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-10-13 10:43:19,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:19,441 INFO L225 Difference]: With dead ends: 140 [2020-10-13 10:43:19,441 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 10:43:19,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:43:19,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 10:43:19,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 64. [2020-10-13 10:43:19,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 10:43:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-10-13 10:43:19,446 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 61 [2020-10-13 10:43:19,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:19,447 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-10-13 10:43:19,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:43:19,447 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-10-13 10:43:19,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:43:19,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:19,452 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:19,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:43:19,452 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:19,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:19,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1022194235, now seen corresponding path program 15 times [2020-10-13 10:43:19,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:19,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226485609] [2020-10-13 10:43:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:19,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:19,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:21,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:21,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 10:43:21,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:21,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2159 [2020-10-13 10:43:21,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:21,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:43:21,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 10:43:21,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:43:21,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:21,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:21,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:21,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:21,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:21,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:21,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:21,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:21,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:21,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:21,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:21,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-13 10:43:21,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226485609] [2020-10-13 10:43:21,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:21,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:43:21,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445515228] [2020-10-13 10:43:21,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:43:21,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:21,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:43:21,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:43:21,717 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 11 states. [2020-10-13 10:43:21,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:21,841 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-13 10:43:21,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:43:21,842 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 63 [2020-10-13 10:43:21,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:21,842 INFO L225 Difference]: With dead ends: 74 [2020-10-13 10:43:21,843 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 10:43:21,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:43:21,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 10:43:21,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-13 10:43:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 10:43:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2020-10-13 10:43:21,847 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 63 [2020-10-13 10:43:21,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:21,847 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2020-10-13 10:43:21,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:43:21,848 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2020-10-13 10:43:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 10:43:21,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:21,848 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:21,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:43:21,849 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:21,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:21,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1373166272, now seen corresponding path program 16 times [2020-10-13 10:43:21,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:21,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244016604] [2020-10-13 10:43:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:21,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:22,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:24,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:24,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 10:43:24,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:24,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2777 [2020-10-13 10:43:24,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:24,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:43:24,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:24,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:43:24,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:24,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:24,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:24,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:24,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:24,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:24,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:24,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:24,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:24,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:24,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:24,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-13 10:43:24,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244016604] [2020-10-13 10:43:24,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:24,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:43:24,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076997977] [2020-10-13 10:43:24,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:43:24,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:24,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:43:24,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:43:24,830 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 18 states. [2020-10-13 10:43:25,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:25,026 INFO L93 Difference]: Finished difference Result 150 states and 184 transitions. [2020-10-13 10:43:25,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:43:25,029 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-10-13 10:43:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:25,030 INFO L225 Difference]: With dead ends: 150 [2020-10-13 10:43:25,030 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 10:43:25,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:43:25,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 10:43:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 70. [2020-10-13 10:43:25,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 10:43:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-10-13 10:43:25,035 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 67 [2020-10-13 10:43:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:25,035 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-10-13 10:43:25,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:43:25,035 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-10-13 10:43:25,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 10:43:25,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:25,036 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:25,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:43:25,037 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:25,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:25,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1769642590, now seen corresponding path program 17 times [2020-10-13 10:43:25,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:25,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963494502] [2020-10-13 10:43:25,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:25,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:25,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:27,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:27,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:43:27,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:27,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2444 [2020-10-13 10:43:27,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:27,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:43:27,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:27,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:43:27,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:27,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:27,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:27,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:27,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:27,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:27,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:27,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:27,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:27,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:27,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:27,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-13 10:43:27,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963494502] [2020-10-13 10:43:27,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:27,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:43:27,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618566547] [2020-10-13 10:43:27,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:43:27,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:27,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:43:27,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:43:27,703 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 19 states. [2020-10-13 10:43:27,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:27,933 INFO L93 Difference]: Finished difference Result 157 states and 193 transitions. [2020-10-13 10:43:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:43:27,934 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2020-10-13 10:43:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:27,935 INFO L225 Difference]: With dead ends: 157 [2020-10-13 10:43:27,935 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 10:43:27,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:43:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 10:43:27,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 72. [2020-10-13 10:43:27,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 10:43:27,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-10-13 10:43:27,941 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 69 [2020-10-13 10:43:27,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:27,942 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-10-13 10:43:27,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:43:27,942 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-10-13 10:43:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 10:43:27,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:27,944 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:27,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:43:27,945 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:27,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:27,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1648017412, now seen corresponding path program 18 times [2020-10-13 10:43:27,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:27,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898440734] [2020-10-13 10:43:27,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:27,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:28,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:31,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:31,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 10:43:31,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:31,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3127 [2020-10-13 10:43:31,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:31,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:43:31,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 10:43:31,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:43:31,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:31,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:31,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:31,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:31,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:31,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:31,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:31,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:31,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:31,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:31,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:31,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 10:43:31,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898440734] [2020-10-13 10:43:31,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:31,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:43:31,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118752037] [2020-10-13 10:43:31,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:43:31,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:31,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:43:31,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:43:31,211 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 12 states. [2020-10-13 10:43:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:31,401 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-10-13 10:43:31,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:43:31,402 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-13 10:43:31,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:31,403 INFO L225 Difference]: With dead ends: 82 [2020-10-13 10:43:31,403 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 10:43:31,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:43:31,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 10:43:31,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-13 10:43:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 10:43:31,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-10-13 10:43:31,409 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 71 [2020-10-13 10:43:31,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:31,410 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-10-13 10:43:31,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:43:31,410 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-10-13 10:43:31,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 10:43:31,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:31,412 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:31,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:43:31,415 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:31,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:31,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1355291657, now seen corresponding path program 19 times [2020-10-13 10:43:31,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:31,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516827004] [2020-10-13 10:43:31,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:31,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:31,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:36,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:36,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 10:43:36,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:36,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4781 [2020-10-13 10:43:36,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:36,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:43:36,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:36,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:43:36,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:36,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:36,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:36,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:36,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:36,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:36,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:36,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:36,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:36,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:36,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:36,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-13 10:43:36,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516827004] [2020-10-13 10:43:36,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:36,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:43:36,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21252262] [2020-10-13 10:43:36,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:43:36,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:36,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:43:36,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:43:36,480 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 20 states. [2020-10-13 10:43:36,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:36,688 INFO L93 Difference]: Finished difference Result 167 states and 205 transitions. [2020-10-13 10:43:36,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:43:36,688 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2020-10-13 10:43:36,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:36,689 INFO L225 Difference]: With dead ends: 167 [2020-10-13 10:43:36,689 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 10:43:36,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:43:36,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 10:43:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 78. [2020-10-13 10:43:36,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 10:43:36,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2020-10-13 10:43:36,699 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 75 [2020-10-13 10:43:36,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:36,699 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2020-10-13 10:43:36,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:43:36,699 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2020-10-13 10:43:36,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 10:43:36,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:36,700 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:36,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:43:36,700 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:36,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:36,701 INFO L82 PathProgramCache]: Analyzing trace with hash 239819541, now seen corresponding path program 20 times [2020-10-13 10:43:36,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:36,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461772803] [2020-10-13 10:43:36,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:36,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:36,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:39,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:39,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 10:43:39,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:39,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2365 [2020-10-13 10:43:39,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:39,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:43:39,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:39,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:43:39,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:39,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:39,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:39,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:39,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:39,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:39,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:39,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:39,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:39,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:39,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:39,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-13 10:43:39,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461772803] [2020-10-13 10:43:39,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:39,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:43:39,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923116152] [2020-10-13 10:43:39,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:43:39,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:39,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:43:39,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:43:39,333 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 21 states. [2020-10-13 10:43:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:39,599 INFO L93 Difference]: Finished difference Result 174 states and 214 transitions. [2020-10-13 10:43:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:43:39,599 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 77 [2020-10-13 10:43:39,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:39,600 INFO L225 Difference]: With dead ends: 174 [2020-10-13 10:43:39,600 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 10:43:39,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:43:39,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 10:43:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 80. [2020-10-13 10:43:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 10:43:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2020-10-13 10:43:39,606 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 77 [2020-10-13 10:43:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:39,606 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2020-10-13 10:43:39,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:43:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2020-10-13 10:43:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 10:43:39,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:39,607 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:39,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:43:39,607 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:39,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:39,608 INFO L82 PathProgramCache]: Analyzing trace with hash -161643853, now seen corresponding path program 21 times [2020-10-13 10:43:39,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:39,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652997357] [2020-10-13 10:43:39,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:39,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:40,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:42,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:42,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 10:43:42,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:42,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2791 [2020-10-13 10:43:42,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:42,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:43:42,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 10:43:42,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:43:42,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:42,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:42,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:42,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:42,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:42,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:42,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:42,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:42,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:42,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:42,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:42,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 10:43:42,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652997357] [2020-10-13 10:43:42,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:42,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:43:42,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141464219] [2020-10-13 10:43:42,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:43:42,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:42,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:43:42,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:43:42,516 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 13 states. [2020-10-13 10:43:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:42,681 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2020-10-13 10:43:42,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:43:42,681 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2020-10-13 10:43:42,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:42,682 INFO L225 Difference]: With dead ends: 90 [2020-10-13 10:43:42,682 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 10:43:42,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:43:42,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 10:43:42,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-13 10:43:42,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 10:43:42,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-10-13 10:43:42,689 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 79 [2020-10-13 10:43:42,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:42,689 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-10-13 10:43:42,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:43:42,689 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-10-13 10:43:42,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 10:43:42,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:42,690 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:42,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:43:42,691 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:42,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:42,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1477315794, now seen corresponding path program 22 times [2020-10-13 10:43:42,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:42,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604723657] [2020-10-13 10:43:42,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:42,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:42,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:45,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:45,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 10:43:45,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:45,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3120 [2020-10-13 10:43:45,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:45,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:43:45,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:45,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:43:45,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:46,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:46,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:46,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:46,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:46,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:46,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:46,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:46,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:46,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:46,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:46,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-13 10:43:46,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604723657] [2020-10-13 10:43:46,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:46,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:43:46,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174669413] [2020-10-13 10:43:46,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:43:46,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:46,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:43:46,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:43:46,096 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 22 states. [2020-10-13 10:43:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:46,361 INFO L93 Difference]: Finished difference Result 184 states and 226 transitions. [2020-10-13 10:43:46,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:43:46,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 83 [2020-10-13 10:43:46,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:46,363 INFO L225 Difference]: With dead ends: 184 [2020-10-13 10:43:46,363 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 10:43:46,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:43:46,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 10:43:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 86. [2020-10-13 10:43:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 10:43:46,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2020-10-13 10:43:46,372 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 83 [2020-10-13 10:43:46,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:46,373 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2020-10-13 10:43:46,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:43:46,373 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2020-10-13 10:43:46,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 10:43:46,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:46,374 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:46,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:43:46,375 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:46,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:46,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1940089932, now seen corresponding path program 23 times [2020-10-13 10:43:46,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:46,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762721181] [2020-10-13 10:43:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:46,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:46,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:49,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:49,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 10:43:49,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:49,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3244 [2020-10-13 10:43:49,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:49,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:43:49,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:43:49,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:43:49,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:49,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:49,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:49,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:49,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:49,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:49,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:49,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:49,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:49,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:49,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:49,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-13 10:43:49,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762721181] [2020-10-13 10:43:49,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:49,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:43:49,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910739121] [2020-10-13 10:43:49,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:43:49,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:49,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:43:49,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:43:49,925 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 23 states. [2020-10-13 10:43:50,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:50,200 INFO L93 Difference]: Finished difference Result 191 states and 235 transitions. [2020-10-13 10:43:50,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:43:50,200 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2020-10-13 10:43:50,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:50,201 INFO L225 Difference]: With dead ends: 191 [2020-10-13 10:43:50,201 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 10:43:50,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:43:50,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 10:43:50,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 88. [2020-10-13 10:43:50,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 10:43:50,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2020-10-13 10:43:50,208 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 85 [2020-10-13 10:43:50,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:50,209 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2020-10-13 10:43:50,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:43:50,209 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2020-10-13 10:43:50,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 10:43:50,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:50,210 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:50,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:43:50,210 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:50,211 INFO L82 PathProgramCache]: Analyzing trace with hash 417011178, now seen corresponding path program 24 times [2020-10-13 10:43:50,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:50,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416114349] [2020-10-13 10:43:50,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:50,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:50,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:55,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:55,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 10:43:55,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:43:55,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 10:43:55,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:43:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 10:43:55,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 10:43:55,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:55,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:55,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:55,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:55,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:55,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:55,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:55,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:55,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:55,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:55,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:55,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-13 10:43:55,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416114349] [2020-10-13 10:43:55,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:55,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:43:55,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702541429] [2020-10-13 10:43:55,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:43:55,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:55,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:43:55,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:43:55,347 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand 14 states. [2020-10-13 10:43:55,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:55,519 INFO L93 Difference]: Finished difference Result 98 states and 109 transitions. [2020-10-13 10:43:55,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:43:55,524 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 87 [2020-10-13 10:43:55,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:55,525 INFO L225 Difference]: With dead ends: 98 [2020-10-13 10:43:55,525 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 10:43:55,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:43:55,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 10:43:55,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-13 10:43:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 10:43:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2020-10-13 10:43:55,532 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 87 [2020-10-13 10:43:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:55,533 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2020-10-13 10:43:55,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:43:55,533 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2020-10-13 10:43:55,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 10:43:55,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:55,533 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:55,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:43:55,534 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:55,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:55,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1584730853, now seen corresponding path program 25 times [2020-10-13 10:43:55,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:55,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758477419] [2020-10-13 10:43:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:55,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:55,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:00,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:00,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 10:44:00,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:00,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4714 [2020-10-13 10:44:00,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:00,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:44:00,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:00,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:44:00,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:00,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:00,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:00,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:00,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:00,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:00,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:00,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:00,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:00,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:00,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:00,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-13 10:44:00,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758477419] [2020-10-13 10:44:00,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:00,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:44:00,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636669440] [2020-10-13 10:44:00,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:44:00,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:00,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:44:00,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:44:00,581 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand 24 states. [2020-10-13 10:44:00,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:00,875 INFO L93 Difference]: Finished difference Result 201 states and 247 transitions. [2020-10-13 10:44:00,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:44:00,875 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 91 [2020-10-13 10:44:00,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:00,877 INFO L225 Difference]: With dead ends: 201 [2020-10-13 10:44:00,877 INFO L226 Difference]: Without dead ends: 156 [2020-10-13 10:44:00,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:44:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-13 10:44:00,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 94. [2020-10-13 10:44:00,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 10:44:00,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2020-10-13 10:44:00,882 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 91 [2020-10-13 10:44:00,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:00,883 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2020-10-13 10:44:00,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:44:00,883 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2020-10-13 10:44:00,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 10:44:00,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:00,884 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:00,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:44:00,884 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:00,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:00,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1583182333, now seen corresponding path program 26 times [2020-10-13 10:44:00,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:00,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67570075] [2020-10-13 10:44:00,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:00,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:00,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:05,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:05,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 10:44:05,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:05,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:44:05,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:05,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:44:05,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:05,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:44:05,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:06,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:06,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:06,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:06,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:06,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:06,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:06,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:06,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:06,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:06,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:06,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-13 10:44:06,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67570075] [2020-10-13 10:44:06,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:06,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:44:06,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465147792] [2020-10-13 10:44:06,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:44:06,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:06,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:44:06,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:44:06,253 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand 25 states. [2020-10-13 10:44:06,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:06,513 INFO L93 Difference]: Finished difference Result 208 states and 256 transitions. [2020-10-13 10:44:06,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:44:06,514 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 93 [2020-10-13 10:44:06,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:06,515 INFO L225 Difference]: With dead ends: 208 [2020-10-13 10:44:06,515 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 10:44:06,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:44:06,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 10:44:06,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 96. [2020-10-13 10:44:06,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 10:44:06,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2020-10-13 10:44:06,521 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 93 [2020-10-13 10:44:06,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:06,521 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2020-10-13 10:44:06,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:44:06,522 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2020-10-13 10:44:06,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 10:44:06,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:06,522 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:06,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:44:06,522 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:06,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:06,523 INFO L82 PathProgramCache]: Analyzing trace with hash -815941215, now seen corresponding path program 27 times [2020-10-13 10:44:06,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:06,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363555434] [2020-10-13 10:44:06,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:06,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:06,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:11,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:11,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 10:44:11,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:11,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 10:44:11,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:11,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:44:11,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 10:44:11,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:44:11,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:11,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:11,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:11,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:11,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:11,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:11,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:11,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:11,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:11,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:11,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:11,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-13 10:44:11,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363555434] [2020-10-13 10:44:11,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:11,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:44:11,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555729688] [2020-10-13 10:44:11,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:44:11,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:11,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:44:11,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:44:11,673 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand 15 states. [2020-10-13 10:44:11,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:11,849 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2020-10-13 10:44:11,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:44:11,850 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 95 [2020-10-13 10:44:11,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:11,851 INFO L225 Difference]: With dead ends: 106 [2020-10-13 10:44:11,851 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 10:44:11,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:44:11,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 10:44:11,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-13 10:44:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 10:44:11,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2020-10-13 10:44:11,858 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 95 [2020-10-13 10:44:11,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:11,858 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2020-10-13 10:44:11,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:44:11,859 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2020-10-13 10:44:11,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 10:44:11,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:11,859 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:11,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:44:11,860 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:11,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:11,863 INFO L82 PathProgramCache]: Analyzing trace with hash 117506844, now seen corresponding path program 28 times [2020-10-13 10:44:11,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:11,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941592923] [2020-10-13 10:44:11,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:11,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:12,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:16,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:16,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 10:44:16,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:16,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:44:16,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:16,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:44:16,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:16,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:44:16,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:17,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:17,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:17,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:17,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:17,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:17,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:17,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:17,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 10:44:17,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941592923] [2020-10-13 10:44:17,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:17,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:44:17,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81181346] [2020-10-13 10:44:17,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:44:17,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:17,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:44:17,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:44:17,247 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand 26 states. [2020-10-13 10:44:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:17,531 INFO L93 Difference]: Finished difference Result 218 states and 268 transitions. [2020-10-13 10:44:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:44:17,533 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 99 [2020-10-13 10:44:17,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:17,534 INFO L225 Difference]: With dead ends: 218 [2020-10-13 10:44:17,534 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 10:44:17,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:44:17,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 10:44:17,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 102. [2020-10-13 10:44:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 10:44:17,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2020-10-13 10:44:17,540 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 99 [2020-10-13 10:44:17,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:17,541 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2020-10-13 10:44:17,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:44:17,541 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2020-10-13 10:44:17,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 10:44:17,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:17,542 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:17,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:44:17,542 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:17,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:17,542 INFO L82 PathProgramCache]: Analyzing trace with hash 243826746, now seen corresponding path program 29 times [2020-10-13 10:44:17,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:17,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660094277] [2020-10-13 10:44:17,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:17,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:18,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:22,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:22,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 10:44:22,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:22,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:44:22,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:22,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:44:22,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:22,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:44:22,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:22,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:22,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:22,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:22,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:22,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:22,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:22,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:22,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:22,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:22,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:22,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 10:44:22,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660094277] [2020-10-13 10:44:22,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:22,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:44:22,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119557172] [2020-10-13 10:44:22,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:44:22,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:22,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:44:22,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:44:22,929 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand 27 states. [2020-10-13 10:44:23,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:23,261 INFO L93 Difference]: Finished difference Result 225 states and 277 transitions. [2020-10-13 10:44:23,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:44:23,264 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 101 [2020-10-13 10:44:23,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:23,265 INFO L225 Difference]: With dead ends: 225 [2020-10-13 10:44:23,266 INFO L226 Difference]: Without dead ends: 176 [2020-10-13 10:44:23,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:44:23,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-13 10:44:23,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 104. [2020-10-13 10:44:23,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 10:44:23,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 116 transitions. [2020-10-13 10:44:23,277 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 116 transitions. Word has length 101 [2020-10-13 10:44:23,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:23,277 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 116 transitions. [2020-10-13 10:44:23,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:44:23,277 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 116 transitions. [2020-10-13 10:44:23,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 10:44:23,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:23,281 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:23,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:44:23,282 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:23,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:23,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1378168280, now seen corresponding path program 30 times [2020-10-13 10:44:23,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:23,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001796068] [2020-10-13 10:44:23,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:23,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:23,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:28,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:28,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 10:44:28,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:28,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 10:44:28,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:28,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:44:28,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 10:44:28,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 10:44:28,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:28,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:28,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:28,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:28,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:28,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:28,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:28,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:28,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:28,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:28,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:28,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 10:44:28,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001796068] [2020-10-13 10:44:28,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:28,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:44:28,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457301739] [2020-10-13 10:44:28,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:44:28,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:28,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:44:28,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:44:28,476 INFO L87 Difference]: Start difference. First operand 104 states and 116 transitions. Second operand 16 states. [2020-10-13 10:44:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:28,666 INFO L93 Difference]: Finished difference Result 114 states and 127 transitions. [2020-10-13 10:44:28,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:44:28,666 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 103 [2020-10-13 10:44:28,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:28,667 INFO L225 Difference]: With dead ends: 114 [2020-10-13 10:44:28,668 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 10:44:28,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:44:28,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 10:44:28,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-13 10:44:28,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 10:44:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2020-10-13 10:44:28,673 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 103 [2020-10-13 10:44:28,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:28,674 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2020-10-13 10:44:28,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:44:28,674 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2020-10-13 10:44:28,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 10:44:28,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:28,675 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:28,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:44:28,675 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:28,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:28,676 INFO L82 PathProgramCache]: Analyzing trace with hash 871728083, now seen corresponding path program 31 times [2020-10-13 10:44:28,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:28,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982537067] [2020-10-13 10:44:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:28,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:29,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:33,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:33,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 10:44:33,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:33,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:44:33,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:33,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:44:33,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:33,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:44:33,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:34,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:34,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:34,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:34,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:34,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:34,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:34,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:34,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:34,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:34,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:34,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-10-13 10:44:34,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982537067] [2020-10-13 10:44:34,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:34,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:44:34,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663560151] [2020-10-13 10:44:34,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:44:34,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:34,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:44:34,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:44:34,101 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand 28 states. [2020-10-13 10:44:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:34,427 INFO L93 Difference]: Finished difference Result 235 states and 289 transitions. [2020-10-13 10:44:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:44:34,428 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2020-10-13 10:44:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:34,429 INFO L225 Difference]: With dead ends: 235 [2020-10-13 10:44:34,429 INFO L226 Difference]: Without dead ends: 182 [2020-10-13 10:44:34,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:44:34,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-13 10:44:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 110. [2020-10-13 10:44:34,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 10:44:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2020-10-13 10:44:34,436 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 107 [2020-10-13 10:44:34,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:34,437 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2020-10-13 10:44:34,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:44:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2020-10-13 10:44:34,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 10:44:34,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:34,438 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:34,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:44:34,438 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:34,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:34,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1900739855, now seen corresponding path program 32 times [2020-10-13 10:44:34,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:34,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314122374] [2020-10-13 10:44:34,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:34,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:35,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:39,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:39,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 10:44:39,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:39,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 10:44:39,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:39,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:44:39,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:39,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 10:44:39,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:39,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:39,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:39,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:39,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:39,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:39,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:39,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:39,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:39,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:39,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:39,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-10-13 10:44:39,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314122374] [2020-10-13 10:44:39,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:39,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:44:39,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805511673] [2020-10-13 10:44:39,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:44:39,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:39,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:44:39,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:44:39,895 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 29 states. [2020-10-13 10:44:40,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:40,241 INFO L93 Difference]: Finished difference Result 242 states and 298 transitions. [2020-10-13 10:44:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:44:40,241 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 109 [2020-10-13 10:44:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:40,242 INFO L225 Difference]: With dead ends: 242 [2020-10-13 10:44:40,243 INFO L226 Difference]: Without dead ends: 189 [2020-10-13 10:44:40,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:44:40,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-13 10:44:40,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 112. [2020-10-13 10:44:40,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 10:44:40,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 125 transitions. [2020-10-13 10:44:40,248 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 125 transitions. Word has length 109 [2020-10-13 10:44:40,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:40,248 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 125 transitions. [2020-10-13 10:44:40,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:44:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 125 transitions. [2020-10-13 10:44:40,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 10:44:40,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:40,249 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:40,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:44:40,250 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:40,250 INFO L82 PathProgramCache]: Analyzing trace with hash 932262543, now seen corresponding path program 33 times [2020-10-13 10:44:40,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:40,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934887873] [2020-10-13 10:44:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:40,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:40,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:45,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:45,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 10:44:45,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:45,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 10:44:45,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:45,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:44:45,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 10:44:45,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 10:44:45,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:45,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:45,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:45,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:45,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:45,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:45,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:44:45,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:45,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:45,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:45,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:45,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-13 10:44:45,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934887873] [2020-10-13 10:44:45,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:45,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:44:45,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638150723] [2020-10-13 10:44:45,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:44:45,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:45,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:44:45,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:44:45,443 INFO L87 Difference]: Start difference. First operand 112 states and 125 transitions. Second operand 17 states. [2020-10-13 10:44:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:45,638 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2020-10-13 10:44:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:44:45,639 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 111 [2020-10-13 10:44:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:45,640 INFO L225 Difference]: With dead ends: 122 [2020-10-13 10:44:45,640 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 10:44:45,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:44:45,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 10:44:45,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-13 10:44:45,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 10:44:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2020-10-13 10:44:45,646 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 111 [2020-10-13 10:44:45,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:45,646 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2020-10-13 10:44:45,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:44:45,647 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2020-10-13 10:44:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 10:44:45,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:45,648 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:45,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:44:45,648 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:45,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:45,648 INFO L82 PathProgramCache]: Analyzing trace with hash -976071414, now seen corresponding path program 34 times [2020-10-13 10:44:45,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:45,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343204041] [2020-10-13 10:44:45,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:45,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:46,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:50,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:50,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 10:44:50,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:50,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 10:44:50,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:50,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:44:50,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:50,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:44:50,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:51,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:51,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:51,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:51,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:51,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:51,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:44:51,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:51,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:51,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:51,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:51,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-13 10:44:51,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343204041] [2020-10-13 10:44:51,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:51,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:44:51,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281398862] [2020-10-13 10:44:51,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:44:51,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:51,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:44:51,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:44:51,191 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand 30 states. [2020-10-13 10:44:51,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:51,571 INFO L93 Difference]: Finished difference Result 252 states and 310 transitions. [2020-10-13 10:44:51,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:44:51,572 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 115 [2020-10-13 10:44:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:51,573 INFO L225 Difference]: With dead ends: 252 [2020-10-13 10:44:51,573 INFO L226 Difference]: Without dead ends: 195 [2020-10-13 10:44:51,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:44:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-13 10:44:51,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 118. [2020-10-13 10:44:51,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 10:44:51,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 132 transitions. [2020-10-13 10:44:51,579 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 132 transitions. Word has length 115 [2020-10-13 10:44:51,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:51,580 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 132 transitions. [2020-10-13 10:44:51,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:44:51,580 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 132 transitions. [2020-10-13 10:44:51,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 10:44:51,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:51,581 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:51,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:44:51,581 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:51,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:51,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1151850024, now seen corresponding path program 35 times [2020-10-13 10:44:51,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:51,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376847485] [2020-10-13 10:44:51,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:51,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:52,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:56,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:56,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 10:44:56,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:44:56,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 10:44:56,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:56,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:44:56,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:44:56,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:44:56,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:57,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:44:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:57,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:57,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:57,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:44:57,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:57,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:44:57,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:57,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:44:57,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:57,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:44:57,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-13 10:44:57,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376847485] [2020-10-13 10:44:57,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:57,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:44:57,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734328542] [2020-10-13 10:44:57,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:44:57,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:57,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:44:57,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:44:57,123 INFO L87 Difference]: Start difference. First operand 118 states and 132 transitions. Second operand 31 states. [2020-10-13 10:44:57,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:57,508 INFO L93 Difference]: Finished difference Result 259 states and 319 transitions. [2020-10-13 10:44:57,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:44:57,508 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 117 [2020-10-13 10:44:57,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:57,510 INFO L225 Difference]: With dead ends: 259 [2020-10-13 10:44:57,510 INFO L226 Difference]: Without dead ends: 202 [2020-10-13 10:44:57,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:44:57,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-13 10:44:57,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 120. [2020-10-13 10:44:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 10:44:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 134 transitions. [2020-10-13 10:44:57,520 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 134 transitions. Word has length 117 [2020-10-13 10:44:57,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:57,521 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 134 transitions. [2020-10-13 10:44:57,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:44:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 134 transitions. [2020-10-13 10:44:57,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 10:44:57,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:57,522 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:57,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:44:57,523 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:57,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:57,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1679919046, now seen corresponding path program 36 times [2020-10-13 10:44:57,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:57,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110440473] [2020-10-13 10:44:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:57,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:58,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:02,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:02,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 10:45:02,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:02,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 10:45:02,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:02,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:45:02,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-13 10:45:02,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 10:45:02,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:02,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:02,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:02,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:02,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:02,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:02,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:02,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:02,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:02,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:02,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:02,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-13 10:45:02,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110440473] [2020-10-13 10:45:02,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:02,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:45:02,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171034190] [2020-10-13 10:45:02,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:45:02,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:02,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:45:02,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:45:02,745 INFO L87 Difference]: Start difference. First operand 120 states and 134 transitions. Second operand 18 states. [2020-10-13 10:45:02,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:02,959 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2020-10-13 10:45:02,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:45:02,959 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 119 [2020-10-13 10:45:02,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:02,960 INFO L225 Difference]: With dead ends: 130 [2020-10-13 10:45:02,960 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 10:45:02,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:45:02,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 10:45:02,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-13 10:45:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 10:45:02,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 139 transitions. [2020-10-13 10:45:02,966 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 139 transitions. Word has length 119 [2020-10-13 10:45:02,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:02,967 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 139 transitions. [2020-10-13 10:45:02,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:45:02,967 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 139 transitions. [2020-10-13 10:45:02,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 10:45:02,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:02,968 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:02,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:45:02,968 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:02,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:02,969 INFO L82 PathProgramCache]: Analyzing trace with hash -617138495, now seen corresponding path program 37 times [2020-10-13 10:45:02,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:02,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82934571] [2020-10-13 10:45:02,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:03,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:03,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:08,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:08,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 10:45:08,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:08,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 10:45:08,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:08,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:45:08,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:45:08,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 10:45:08,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:08,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:08,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:08,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:08,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:08,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:08,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:08,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:08,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:08,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:08,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:08,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-13 10:45:08,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82934571] [2020-10-13 10:45:08,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:08,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:45:08,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30993511] [2020-10-13 10:45:08,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:45:08,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:08,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:45:08,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:45:08,577 INFO L87 Difference]: Start difference. First operand 124 states and 139 transitions. Second operand 32 states. [2020-10-13 10:45:08,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:08,964 INFO L93 Difference]: Finished difference Result 269 states and 331 transitions. [2020-10-13 10:45:08,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:45:08,968 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 123 [2020-10-13 10:45:08,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:08,970 INFO L225 Difference]: With dead ends: 269 [2020-10-13 10:45:08,970 INFO L226 Difference]: Without dead ends: 208 [2020-10-13 10:45:08,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:45:08,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-13 10:45:08,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 126. [2020-10-13 10:45:08,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 10:45:08,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 141 transitions. [2020-10-13 10:45:08,976 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 141 transitions. Word has length 123 [2020-10-13 10:45:08,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:08,977 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 141 transitions. [2020-10-13 10:45:08,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:45:08,977 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 141 transitions. [2020-10-13 10:45:08,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 10:45:08,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:08,978 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:08,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:45:08,978 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:08,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:08,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1862223393, now seen corresponding path program 38 times [2020-10-13 10:45:08,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:08,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792446279] [2020-10-13 10:45:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:09,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:09,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:14,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:14,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 10:45:14,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:14,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 10:45:14,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:14,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:45:14,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:45:14,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 10:45:14,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:14,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:14,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:14,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:14,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:14,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:14,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:14,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:14,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:14,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:14,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:14,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-13 10:45:14,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792446279] [2020-10-13 10:45:14,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:14,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:45:14,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635825195] [2020-10-13 10:45:14,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:45:14,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:14,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:45:14,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:45:14,580 INFO L87 Difference]: Start difference. First operand 126 states and 141 transitions. Second operand 33 states. [2020-10-13 10:45:14,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:14,973 INFO L93 Difference]: Finished difference Result 276 states and 340 transitions. [2020-10-13 10:45:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:45:14,973 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 125 [2020-10-13 10:45:14,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:14,975 INFO L225 Difference]: With dead ends: 276 [2020-10-13 10:45:14,975 INFO L226 Difference]: Without dead ends: 215 [2020-10-13 10:45:14,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:45:14,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-13 10:45:14,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 128. [2020-10-13 10:45:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 10:45:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 143 transitions. [2020-10-13 10:45:14,983 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 143 transitions. Word has length 125 [2020-10-13 10:45:14,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:14,983 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 143 transitions. [2020-10-13 10:45:14,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:45:14,983 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 143 transitions. [2020-10-13 10:45:14,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 10:45:14,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:14,984 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:14,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:45:14,984 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:14,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:14,985 INFO L82 PathProgramCache]: Analyzing trace with hash -92934787, now seen corresponding path program 39 times [2020-10-13 10:45:14,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:14,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823302614] [2020-10-13 10:45:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:15,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:15,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:20,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:20,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 10:45:20,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:20,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:45:20,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:20,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:45:20,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 10:45:20,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 10:45:20,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:20,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:20,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:20,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:20,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:20,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:20,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:20,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:20,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:20,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:20,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:20,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-13 10:45:20,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823302614] [2020-10-13 10:45:20,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:20,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:45:20,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403488668] [2020-10-13 10:45:20,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:45:20,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:20,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:45:20,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:45:20,210 INFO L87 Difference]: Start difference. First operand 128 states and 143 transitions. Second operand 19 states. [2020-10-13 10:45:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:20,441 INFO L93 Difference]: Finished difference Result 138 states and 154 transitions. [2020-10-13 10:45:20,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:45:20,442 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 127 [2020-10-13 10:45:20,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:20,444 INFO L225 Difference]: With dead ends: 138 [2020-10-13 10:45:20,444 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 10:45:20,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:45:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 10:45:20,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-10-13 10:45:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 10:45:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 148 transitions. [2020-10-13 10:45:20,450 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 148 transitions. Word has length 127 [2020-10-13 10:45:20,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:20,451 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 148 transitions. [2020-10-13 10:45:20,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:45:20,451 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 148 transitions. [2020-10-13 10:45:20,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 10:45:20,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:20,452 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:20,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:45:20,452 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:20,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:20,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1058805512, now seen corresponding path program 40 times [2020-10-13 10:45:20,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:20,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607260784] [2020-10-13 10:45:20,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:20,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:21,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:25,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:25,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 10:45:25,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:25,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 10:45:25,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:25,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:45:25,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:45:25,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:45:25,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:26,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:26,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:26,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:26,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:26,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:26,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:26,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:26,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:26,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:26,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:26,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-10-13 10:45:26,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607260784] [2020-10-13 10:45:26,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:26,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:45:26,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821464062] [2020-10-13 10:45:26,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:45:26,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:26,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:45:26,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:45:26,089 INFO L87 Difference]: Start difference. First operand 132 states and 148 transitions. Second operand 34 states. [2020-10-13 10:45:26,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:26,453 INFO L93 Difference]: Finished difference Result 286 states and 352 transitions. [2020-10-13 10:45:26,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:45:26,454 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 131 [2020-10-13 10:45:26,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:26,456 INFO L225 Difference]: With dead ends: 286 [2020-10-13 10:45:26,456 INFO L226 Difference]: Without dead ends: 221 [2020-10-13 10:45:26,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:45:26,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-13 10:45:26,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 134. [2020-10-13 10:45:26,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 10:45:26,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 150 transitions. [2020-10-13 10:45:26,462 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 150 transitions. Word has length 131 [2020-10-13 10:45:26,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:26,462 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 150 transitions. [2020-10-13 10:45:26,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:45:26,463 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 150 transitions. [2020-10-13 10:45:26,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 10:45:26,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:26,463 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:26,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:45:26,464 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:26,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:26,464 INFO L82 PathProgramCache]: Analyzing trace with hash 41905686, now seen corresponding path program 41 times [2020-10-13 10:45:26,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:26,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723301979] [2020-10-13 10:45:26,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:26,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:27,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:31,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:31,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 10:45:31,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:31,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 10:45:31,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:31,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:45:31,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:45:31,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 10:45:31,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:32,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:32,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:32,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:32,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:32,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:32,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:32,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:32,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:32,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:32,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:32,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-10-13 10:45:32,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723301979] [2020-10-13 10:45:32,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:32,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 10:45:32,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866133674] [2020-10-13 10:45:32,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 10:45:32,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:32,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 10:45:32,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:45:32,121 INFO L87 Difference]: Start difference. First operand 134 states and 150 transitions. Second operand 35 states. [2020-10-13 10:45:32,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:32,539 INFO L93 Difference]: Finished difference Result 293 states and 361 transitions. [2020-10-13 10:45:32,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:45:32,540 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2020-10-13 10:45:32,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:32,541 INFO L225 Difference]: With dead ends: 293 [2020-10-13 10:45:32,542 INFO L226 Difference]: Without dead ends: 228 [2020-10-13 10:45:32,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:45:32,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-13 10:45:32,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 136. [2020-10-13 10:45:32,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 10:45:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 152 transitions. [2020-10-13 10:45:32,548 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 152 transitions. Word has length 133 [2020-10-13 10:45:32,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:32,548 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 152 transitions. [2020-10-13 10:45:32,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 10:45:32,549 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 152 transitions. [2020-10-13 10:45:32,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 10:45:32,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:32,550 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:32,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:45:32,550 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:32,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:32,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1263412148, now seen corresponding path program 42 times [2020-10-13 10:45:32,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:32,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941638050] [2020-10-13 10:45:32,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:32,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:34,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:37,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:37,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-13 10:45:37,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:37,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:45:37,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:37,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:45:37,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 10:45:37,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 10:45:37,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:37,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:37,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:37,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:37,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:37,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:37,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:37,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:37,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:37,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:37,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:37,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-13 10:45:37,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941638050] [2020-10-13 10:45:37,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:37,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:45:37,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52651813] [2020-10-13 10:45:37,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:45:37,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:37,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:45:37,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:45:37,800 INFO L87 Difference]: Start difference. First operand 136 states and 152 transitions. Second operand 20 states. [2020-10-13 10:45:38,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:38,019 INFO L93 Difference]: Finished difference Result 146 states and 163 transitions. [2020-10-13 10:45:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:45:38,020 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 135 [2020-10-13 10:45:38,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:38,022 INFO L225 Difference]: With dead ends: 146 [2020-10-13 10:45:38,022 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 10:45:38,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:45:38,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 10:45:38,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-10-13 10:45:38,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 10:45:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 157 transitions. [2020-10-13 10:45:38,028 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 157 transitions. Word has length 135 [2020-10-13 10:45:38,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:38,028 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 157 transitions. [2020-10-13 10:45:38,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:45:38,029 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 157 transitions. [2020-10-13 10:45:38,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-13 10:45:38,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:38,030 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:38,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 10:45:38,030 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:38,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:38,030 INFO L82 PathProgramCache]: Analyzing trace with hash -508023889, now seen corresponding path program 43 times [2020-10-13 10:45:38,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:38,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297011464] [2020-10-13 10:45:38,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:38,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:38,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:43,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:43,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-13 10:45:43,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:43,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 10:45:43,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:43,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:45:43,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:45:43,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 10:45:43,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:43,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:43,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:43,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:43,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:43,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:43,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:43,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:43,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:43,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:43,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:43,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-10-13 10:45:43,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297011464] [2020-10-13 10:45:43,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:43,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 10:45:43,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490914596] [2020-10-13 10:45:43,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 10:45:43,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:43,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 10:45:43,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:45:43,736 INFO L87 Difference]: Start difference. First operand 140 states and 157 transitions. Second operand 36 states. [2020-10-13 10:45:44,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:44,121 INFO L93 Difference]: Finished difference Result 303 states and 373 transitions. [2020-10-13 10:45:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:45:44,122 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 139 [2020-10-13 10:45:44,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:44,124 INFO L225 Difference]: With dead ends: 303 [2020-10-13 10:45:44,124 INFO L226 Difference]: Without dead ends: 234 [2020-10-13 10:45:44,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:45:44,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-13 10:45:44,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 142. [2020-10-13 10:45:44,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 10:45:44,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 159 transitions. [2020-10-13 10:45:44,133 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 159 transitions. Word has length 139 [2020-10-13 10:45:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:44,134 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 159 transitions. [2020-10-13 10:45:44,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 10:45:44,134 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 159 transitions. [2020-10-13 10:45:44,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 10:45:44,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:44,135 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:44,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 10:45:44,135 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:44,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:44,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1174647501, now seen corresponding path program 44 times [2020-10-13 10:45:44,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:44,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602332201] [2020-10-13 10:45:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:44,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:44,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:49,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:49,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 10:45:49,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:49,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 10:45:49,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:49,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:45:49,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:45:49,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 10:45:49,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:49,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:49,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:49,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:49,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:49,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:49,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:45:49,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:49,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:49,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:49,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:49,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-10-13 10:45:49,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602332201] [2020-10-13 10:45:49,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:49,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 10:45:49,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009432492] [2020-10-13 10:45:49,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 10:45:49,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:49,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 10:45:49,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:45:49,897 INFO L87 Difference]: Start difference. First operand 142 states and 159 transitions. Second operand 37 states. [2020-10-13 10:45:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:50,278 INFO L93 Difference]: Finished difference Result 310 states and 382 transitions. [2020-10-13 10:45:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:45:50,279 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 141 [2020-10-13 10:45:50,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:50,281 INFO L225 Difference]: With dead ends: 310 [2020-10-13 10:45:50,281 INFO L226 Difference]: Without dead ends: 241 [2020-10-13 10:45:50,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:45:50,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-13 10:45:50,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 144. [2020-10-13 10:45:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 10:45:50,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 161 transitions. [2020-10-13 10:45:50,288 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 161 transitions. Word has length 141 [2020-10-13 10:45:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:50,288 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 161 transitions. [2020-10-13 10:45:50,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 10:45:50,288 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 161 transitions. [2020-10-13 10:45:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 10:45:50,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:50,289 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:50,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 10:45:50,290 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:50,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:50,290 INFO L82 PathProgramCache]: Analyzing trace with hash -980817301, now seen corresponding path program 45 times [2020-10-13 10:45:50,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:50,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758952958] [2020-10-13 10:45:50,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:50,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:52,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:55,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:55,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 10:45:55,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:45:55,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 10:45:55,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:55,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:45:55,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 10:45:55,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 10:45:55,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:55,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:45:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:55,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:55,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:45:55,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:45:55,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:45:55,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:45:55,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:45:55,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:45:55,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:45:55,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:45:55,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:45:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1621 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-13 10:45:55,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758952958] [2020-10-13 10:45:55,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:45:55,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:45:55,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754083837] [2020-10-13 10:45:55,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:45:55,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:45:55,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:45:55,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:45:55,614 INFO L87 Difference]: Start difference. First operand 144 states and 161 transitions. Second operand 21 states. [2020-10-13 10:45:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:45:55,869 INFO L93 Difference]: Finished difference Result 154 states and 172 transitions. [2020-10-13 10:45:55,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:45:55,870 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 143 [2020-10-13 10:45:55,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:45:55,872 INFO L225 Difference]: With dead ends: 154 [2020-10-13 10:45:55,872 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 10:45:55,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:45:55,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 10:45:55,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-13 10:45:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 10:45:55,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 166 transitions. [2020-10-13 10:45:55,880 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 166 transitions. Word has length 143 [2020-10-13 10:45:55,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:45:55,881 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 166 transitions. [2020-10-13 10:45:55,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:45:55,882 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 166 transitions. [2020-10-13 10:45:55,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 10:45:55,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:45:55,884 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:45:55,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 10:45:55,884 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:45:55,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:45:55,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1229734170, now seen corresponding path program 46 times [2020-10-13 10:45:55,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:45:55,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026308007] [2020-10-13 10:45:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:45:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:45:55,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:45:57,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:00,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:00,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 10:46:00,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:46:00,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 10:46:00,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:00,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:46:00,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:46:00,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 10:46:00,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:01,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:01,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:01,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:01,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:46:01,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:01,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:01,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:01,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:01,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:01,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:01,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-13 10:46:01,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026308007] [2020-10-13 10:46:01,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:01,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 10:46:01,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570005298] [2020-10-13 10:46:01,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 10:46:01,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:01,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 10:46:01,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:46:01,686 INFO L87 Difference]: Start difference. First operand 148 states and 166 transitions. Second operand 38 states. [2020-10-13 10:46:02,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:02,197 INFO L93 Difference]: Finished difference Result 320 states and 394 transitions. [2020-10-13 10:46:02,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 10:46:02,198 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 147 [2020-10-13 10:46:02,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:02,200 INFO L225 Difference]: With dead ends: 320 [2020-10-13 10:46:02,200 INFO L226 Difference]: Without dead ends: 247 [2020-10-13 10:46:02,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:46:02,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-13 10:46:02,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 150. [2020-10-13 10:46:02,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 10:46:02,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 168 transitions. [2020-10-13 10:46:02,206 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 168 transitions. Word has length 147 [2020-10-13 10:46:02,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:02,206 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 168 transitions. [2020-10-13 10:46:02,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 10:46:02,206 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 168 transitions. [2020-10-13 10:46:02,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 10:46:02,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:02,208 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:02,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 10:46:02,208 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:02,208 INFO L82 PathProgramCache]: Analyzing trace with hash 378357764, now seen corresponding path program 47 times [2020-10-13 10:46:02,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:02,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178864676] [2020-10-13 10:46:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:02,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:03,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:07,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:07,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 10:46:07,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:46:07,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 10:46:07,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:07,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 10:46:07,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:46:07,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 10:46:07,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:08,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:08,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:08,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:08,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:46:08,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:08,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:08,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:08,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:08,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:08,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:08,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-13 10:46:08,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178864676] [2020-10-13 10:46:08,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:08,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 10:46:08,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498748902] [2020-10-13 10:46:08,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 10:46:08,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:08,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 10:46:08,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:46:08,068 INFO L87 Difference]: Start difference. First operand 150 states and 168 transitions. Second operand 39 states. [2020-10-13 10:46:08,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:08,604 INFO L93 Difference]: Finished difference Result 327 states and 403 transitions. [2020-10-13 10:46:08,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 10:46:08,605 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 149 [2020-10-13 10:46:08,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:08,607 INFO L225 Difference]: With dead ends: 327 [2020-10-13 10:46:08,607 INFO L226 Difference]: Without dead ends: 254 [2020-10-13 10:46:08,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:46:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-13 10:46:08,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 152. [2020-10-13 10:46:08,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 10:46:08,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 170 transitions. [2020-10-13 10:46:08,617 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 170 transitions. Word has length 149 [2020-10-13 10:46:08,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:08,618 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 170 transitions. [2020-10-13 10:46:08,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 10:46:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 170 transitions. [2020-10-13 10:46:08,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 10:46:08,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:08,620 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:08,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 10:46:08,620 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:08,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:08,621 INFO L82 PathProgramCache]: Analyzing trace with hash -433520222, now seen corresponding path program 48 times [2020-10-13 10:46:08,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:08,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873339868] [2020-10-13 10:46:08,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:08,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:10,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:13,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:13,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 10:46:13,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:46:13,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 10:46:13,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:13,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:46:13,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-13 10:46:13,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 10:46:13,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:13,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:13,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:13,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:13,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:46:13,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:13,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:13,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:13,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:13,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:13,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:13,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-13 10:46:13,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873339868] [2020-10-13 10:46:13,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:13,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:46:13,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559062575] [2020-10-13 10:46:13,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:46:13,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:13,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:46:13,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:46:13,941 INFO L87 Difference]: Start difference. First operand 152 states and 170 transitions. Second operand 22 states. [2020-10-13 10:46:14,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:14,167 INFO L93 Difference]: Finished difference Result 162 states and 181 transitions. [2020-10-13 10:46:14,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:46:14,167 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 151 [2020-10-13 10:46:14,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:14,169 INFO L225 Difference]: With dead ends: 162 [2020-10-13 10:46:14,169 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 10:46:14,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:46:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 10:46:14,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-13 10:46:14,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 10:46:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 175 transitions. [2020-10-13 10:46:14,175 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 175 transitions. Word has length 151 [2020-10-13 10:46:14,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:14,176 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 175 transitions. [2020-10-13 10:46:14,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:46:14,176 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 175 transitions. [2020-10-13 10:46:14,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 10:46:14,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:14,177 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:14,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 10:46:14,177 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:14,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:14,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1225366883, now seen corresponding path program 49 times [2020-10-13 10:46:14,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:14,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710695963] [2020-10-13 10:46:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:14,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:16,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:19,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:19,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 10:46:19,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:46:19,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 10:46:19,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:19,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 10:46:19,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:46:19,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 10:46:19,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:20,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:20,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:20,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:20,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:46:20,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:20,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:46:20,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:20,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:20,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:20,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:20,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-10-13 10:46:20,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710695963] [2020-10-13 10:46:20,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:20,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 10:46:20,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711759848] [2020-10-13 10:46:20,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 10:46:20,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:20,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 10:46:20,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:46:20,051 INFO L87 Difference]: Start difference. First operand 156 states and 175 transitions. Second operand 40 states. [2020-10-13 10:46:20,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:20,564 INFO L93 Difference]: Finished difference Result 337 states and 415 transitions. [2020-10-13 10:46:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 10:46:20,565 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 155 [2020-10-13 10:46:20,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:20,566 INFO L225 Difference]: With dead ends: 337 [2020-10-13 10:46:20,566 INFO L226 Difference]: Without dead ends: 260 [2020-10-13 10:46:20,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:46:20,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-13 10:46:20,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 158. [2020-10-13 10:46:20,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-13 10:46:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 177 transitions. [2020-10-13 10:46:20,572 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 177 transitions. Word has length 155 [2020-10-13 10:46:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:20,572 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 177 transitions. [2020-10-13 10:46:20,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 10:46:20,573 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 177 transitions. [2020-10-13 10:46:20,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-13 10:46:20,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:20,574 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:20,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 10:46:20,574 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:20,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:20,574 INFO L82 PathProgramCache]: Analyzing trace with hash 758902203, now seen corresponding path program 50 times [2020-10-13 10:46:20,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:20,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630854079] [2020-10-13 10:46:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:20,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:22,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:25,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:25,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 10:46:25,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:46:25,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 10:46:25,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:25,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 10:46:25,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:46:25,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 10:46:25,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:26,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:26,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:26,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:26,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:46:26,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:26,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:26,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:26,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:26,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:26,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:26,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-10-13 10:46:26,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630854079] [2020-10-13 10:46:26,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:26,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 10:46:26,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882092831] [2020-10-13 10:46:26,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 10:46:26,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:26,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 10:46:26,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:46:26,536 INFO L87 Difference]: Start difference. First operand 158 states and 177 transitions. Second operand 41 states. [2020-10-13 10:46:26,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:26,970 INFO L93 Difference]: Finished difference Result 344 states and 424 transitions. [2020-10-13 10:46:26,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 10:46:26,970 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 157 [2020-10-13 10:46:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:26,972 INFO L225 Difference]: With dead ends: 344 [2020-10-13 10:46:26,972 INFO L226 Difference]: Without dead ends: 267 [2020-10-13 10:46:26,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:46:26,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-13 10:46:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 160. [2020-10-13 10:46:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 10:46:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 179 transitions. [2020-10-13 10:46:26,976 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 179 transitions. Word has length 157 [2020-10-13 10:46:26,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:26,977 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 179 transitions. [2020-10-13 10:46:26,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 10:46:26,977 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 179 transitions. [2020-10-13 10:46:26,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-13 10:46:26,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:26,978 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:26,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 10:46:26,978 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:26,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:26,978 INFO L82 PathProgramCache]: Analyzing trace with hash 676014425, now seen corresponding path program 51 times [2020-10-13 10:46:26,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:26,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629033541] [2020-10-13 10:46:26,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:27,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:27,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:32,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:32,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-13 10:46:32,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:46:32,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-13 10:46:32,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:32,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:46:32,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-13 10:46:32,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 10:46:32,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:32,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:32,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:32,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:32,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:46:32,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:32,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:32,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:32,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:32,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:32,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:32,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2039 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-10-13 10:46:32,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629033541] [2020-10-13 10:46:32,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:32,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:46:32,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888295545] [2020-10-13 10:46:32,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:46:32,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:32,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:46:32,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:46:32,314 INFO L87 Difference]: Start difference. First operand 160 states and 179 transitions. Second operand 23 states. [2020-10-13 10:46:32,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:32,576 INFO L93 Difference]: Finished difference Result 170 states and 190 transitions. [2020-10-13 10:46:32,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:46:32,576 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 159 [2020-10-13 10:46:32,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:32,578 INFO L225 Difference]: With dead ends: 170 [2020-10-13 10:46:32,578 INFO L226 Difference]: Without dead ends: 165 [2020-10-13 10:46:32,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:46:32,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-13 10:46:32,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2020-10-13 10:46:32,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-13 10:46:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 184 transitions. [2020-10-13 10:46:32,583 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 184 transitions. Word has length 159 [2020-10-13 10:46:32,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:32,584 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 184 transitions. [2020-10-13 10:46:32,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:46:32,584 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 184 transitions. [2020-10-13 10:46:32,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-13 10:46:32,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:32,585 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:32,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 10:46:32,585 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:32,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1203754708, now seen corresponding path program 52 times [2020-10-13 10:46:32,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:32,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917369590] [2020-10-13 10:46:32,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:32,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:34,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:37,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:37,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-13 10:46:37,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:46:37,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 10:46:37,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:37,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 10:46:37,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:46:37,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 10:46:37,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:38,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:38,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:38,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:38,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:46:38,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:38,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:46:38,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:38,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:38,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:38,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:38,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2110 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2020-10-13 10:46:38,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917369590] [2020-10-13 10:46:38,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:38,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 10:46:38,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538727649] [2020-10-13 10:46:38,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 10:46:38,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:38,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 10:46:38,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:46:38,541 INFO L87 Difference]: Start difference. First operand 164 states and 184 transitions. Second operand 42 states. [2020-10-13 10:46:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:39,004 INFO L93 Difference]: Finished difference Result 354 states and 436 transitions. [2020-10-13 10:46:39,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 10:46:39,004 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 163 [2020-10-13 10:46:39,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:39,007 INFO L225 Difference]: With dead ends: 354 [2020-10-13 10:46:39,007 INFO L226 Difference]: Without dead ends: 273 [2020-10-13 10:46:39,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:46:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-13 10:46:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 166. [2020-10-13 10:46:39,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 10:46:39,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 186 transitions. [2020-10-13 10:46:39,014 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 186 transitions. Word has length 163 [2020-10-13 10:46:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:39,014 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 186 transitions. [2020-10-13 10:46:39,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 10:46:39,014 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 186 transitions. [2020-10-13 10:46:39,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-13 10:46:39,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:39,015 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:39,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 10:46:39,016 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:39,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:39,016 INFO L82 PathProgramCache]: Analyzing trace with hash 827286514, now seen corresponding path program 53 times [2020-10-13 10:46:39,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:39,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730252129] [2020-10-13 10:46:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:39,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:39,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:44,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:44,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-13 10:46:44,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:46:44,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:46:44,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:44,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 10:46:44,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:46:44,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 10:46:44,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:44,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:46:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:44,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:46:44,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:46:44,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:46:44,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:46:44,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:46:44,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:46:44,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:46:44,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:46:44,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:46:44,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:46:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2020-10-13 10:46:45,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730252129] [2020-10-13 10:46:45,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:46:45,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 10:46:45,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894235433] [2020-10-13 10:46:45,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 10:46:45,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:46:45,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 10:46:45,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:46:45,011 INFO L87 Difference]: Start difference. First operand 166 states and 186 transitions. Second operand 43 states. [2020-10-13 10:46:45,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:46:45,477 INFO L93 Difference]: Finished difference Result 361 states and 445 transitions. [2020-10-13 10:46:45,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 10:46:45,478 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 165 [2020-10-13 10:46:45,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:46:45,480 INFO L225 Difference]: With dead ends: 361 [2020-10-13 10:46:45,480 INFO L226 Difference]: Without dead ends: 280 [2020-10-13 10:46:45,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:46:45,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-13 10:46:45,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 168. [2020-10-13 10:46:45,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-13 10:46:45,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 188 transitions. [2020-10-13 10:46:45,487 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 188 transitions. Word has length 165 [2020-10-13 10:46:45,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:46:45,487 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 188 transitions. [2020-10-13 10:46:45,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 10:46:45,487 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 188 transitions. [2020-10-13 10:46:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 10:46:45,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:46:45,488 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:46:45,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 10:46:45,490 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:46:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:46:45,490 INFO L82 PathProgramCache]: Analyzing trace with hash -181395056, now seen corresponding path program 54 times [2020-10-13 10:46:45,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:46:45,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102242151] [2020-10-13 10:46:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:46:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:46:45,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking...