/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/loops-crafted-1/in-de20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:56:42,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:56:42,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:56:42,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:56:42,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:56:42,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:56:42,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:56:42,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:56:42,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:56:42,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:56:42,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:56:42,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:56:42,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:56:42,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:56:42,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:56:42,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:56:42,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:56:42,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:56:42,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:56:42,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:56:42,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:56:42,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:56:42,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:56:42,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:56:42,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:56:42,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:56:42,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:56:42,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:56:42,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:56:42,555 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:56:42,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:56:42,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:56:42,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:56:42,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:56:42,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:56:42,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:56:42,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:56:42,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:56:42,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:56:42,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:56:42,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:56:42,566 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 [2020-10-14 23:56:42,606 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:56:42,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:56:42,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:56:42,610 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:56:42,611 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:56:42,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:56:42,611 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:56:42,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:56:42,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:56:42,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:56:42,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:56:42,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:56:42,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:56:42,615 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:56:42,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:56:42,615 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:56:42,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:56:42,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:56:42,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:56:42,616 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:56:42,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:56:42,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:56:42,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:56:42,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:56:42,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:56:42,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:56:42,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:56:42,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:56:42,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:56:42,618 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:56:42,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:56:42,919 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:56:42,922 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:56:42,924 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:56:42,924 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:56:42,925 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de20.c [2020-10-14 23:56:42,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c108f527/26ccf185d16b40c082c55974c9cac1d3/FLAG6c038f486 [2020-10-14 23:56:43,476 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:56:43,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de20.c [2020-10-14 23:56:43,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c108f527/26ccf185d16b40c082c55974c9cac1d3/FLAG6c038f486 [2020-10-14 23:56:43,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c108f527/26ccf185d16b40c082c55974c9cac1d3 [2020-10-14 23:56:43,859 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:56:43,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:56:43,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:56:43,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:56:43,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:56:43,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:43" (1/1) ... [2020-10-14 23:56:43,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70c28f8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:43, skipping insertion in model container [2020-10-14 23:56:43,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:43" (1/1) ... [2020-10-14 23:56:43,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:56:43,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:56:44,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:56:44,084 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:56:44,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:56:44,118 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:56:44,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:44 WrapperNode [2020-10-14 23:56:44,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:56:44,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:56:44,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:56:44,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:56:44,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:44" (1/1) ... [2020-10-14 23:56:44,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:44" (1/1) ... [2020-10-14 23:56:44,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:44" (1/1) ... [2020-10-14 23:56:44,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:44" (1/1) ... [2020-10-14 23:56:44,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:44" (1/1) ... [2020-10-14 23:56:44,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:44" (1/1) ... [2020-10-14 23:56:44,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:44" (1/1) ... [2020-10-14 23:56:44,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:56:44,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:56:44,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:56:44,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:56:44,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:44" (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 [2020-10-14 23:56:44,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:56:44,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:56:44,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:56:44,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:56:44,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:56:44,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 23:56:44,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:56:44,313 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:56:44,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:56:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:56:44,506 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:56:44,506 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 23:56:44,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:44 BoogieIcfgContainer [2020-10-14 23:56:44,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:56:44,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:56:44,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:56:44,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:56:44,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:56:43" (1/3) ... [2020-10-14 23:56:44,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a98148c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:44, skipping insertion in model container [2020-10-14 23:56:44,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:44" (2/3) ... [2020-10-14 23:56:44,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a98148c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:44, skipping insertion in model container [2020-10-14 23:56:44,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:44" (3/3) ... [2020-10-14 23:56:44,520 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de20.c [2020-10-14 23:56:44,533 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:56:44,541 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:56:44,556 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:56:44,579 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:56:44,580 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:56:44,580 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:56:44,580 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:56:44,580 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:56:44,580 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:56:44,580 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:56:44,581 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:56:44,599 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-14 23:56:44,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 23:56:44,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:44,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:44,606 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:44,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:44,612 INFO L82 PathProgramCache]: Analyzing trace with hash -636194921, now seen corresponding path program 1 times [2020-10-14 23:56:44,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:44,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437656959] [2020-10-14 23:56:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:44,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:44,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:44,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 23:56:44,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:44,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-14 23:56:44,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:44,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:44,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:56:44,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:44,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:56:44,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:56:45,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:45,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:45,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:45,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:45,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:45,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:56:45,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:45,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:45,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:45,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:45,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:45,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:56:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:45,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437656959] [2020-10-14 23:56:45,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:56:45,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 23:56:45,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251859418] [2020-10-14 23:56:45,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:56:45,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:45,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:56:45,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:56:45,132 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-10-14 23:56:45,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:45,249 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2020-10-14 23:56:45,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:56:45,252 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-14 23:56:45,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:45,262 INFO L225 Difference]: With dead ends: 45 [2020-10-14 23:56:45,262 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 23:56:45,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:56:45,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 23:56:45,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-14 23:56:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-14 23:56:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-14 23:56:45,316 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2020-10-14 23:56:45,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:45,317 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-14 23:56:45,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:56:45,317 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-14 23:56:45,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 23:56:45,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:45,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:45,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:56:45,319 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:45,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:45,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1788331685, now seen corresponding path program 1 times [2020-10-14 23:56:45,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:45,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788772507] [2020-10-14 23:56:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:45,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:45,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:45,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 23:56:45,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:45,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-14 23:56:45,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:45,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:45,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:56:45,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:45,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 23:56:45,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:45,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:45,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:45,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:45,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:45,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:45,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:56:45,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:45,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:45,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:45,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:45,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:45,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:45,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788772507] [2020-10-14 23:56:45,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:56:45,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 23:56:45,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56022370] [2020-10-14 23:56:45,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:56:45,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:45,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:56:45,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:56:45,520 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2020-10-14 23:56:45,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:45,564 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-10-14 23:56:45,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:56:45,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-14 23:56:45,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:45,566 INFO L225 Difference]: With dead ends: 22 [2020-10-14 23:56:45,566 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 23:56:45,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:56:45,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 23:56:45,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 23:56:45,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 23:56:45,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-14 23:56:45,573 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 13 [2020-10-14 23:56:45,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:45,573 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-14 23:56:45,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:56:45,573 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-14 23:56:45,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 23:56:45,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:45,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:45,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:56:45,575 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:45,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:45,575 INFO L82 PathProgramCache]: Analyzing trace with hash -308732090, now seen corresponding path program 1 times [2020-10-14 23:56:45,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:45,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536649000] [2020-10-14 23:56:45,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:45,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:45,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:45,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 23:56:45,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:45,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-14 23:56:45,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:45,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:45,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:56:45,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:45,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 23:56:45,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:45,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:45,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:45,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:45,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:45,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:45,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:45,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:45,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:45,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:45,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:45,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:45,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:45,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536649000] [2020-10-14 23:56:45,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:45,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:56:45,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077236037] [2020-10-14 23:56:45,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:56:45,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:45,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:56:45,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:56:45,724 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-10-14 23:56:45,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:45,770 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-14 23:56:45,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:56:45,771 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-14 23:56:45,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:45,773 INFO L225 Difference]: With dead ends: 24 [2020-10-14 23:56:45,774 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 23:56:45,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:56:45,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 23:56:45,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-14 23:56:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 23:56:45,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-14 23:56:45,781 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-10-14 23:56:45,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:45,782 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-14 23:56:45,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:56:45,782 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-14 23:56:45,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 23:56:45,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:45,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:45,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:56:45,784 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:45,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:45,784 INFO L82 PathProgramCache]: Analyzing trace with hash -945222442, now seen corresponding path program 1 times [2020-10-14 23:56:45,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:45,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139734463] [2020-10-14 23:56:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:45,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:45,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:45,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 23:56:45,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:45,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-14 23:56:45,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:45,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:45,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:56:45,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:45,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:56:45,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:46,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:46,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:46,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:46,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:46,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:46,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:56:46,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:46,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:46,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:46,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:46,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:46,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:46,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139734463] [2020-10-14 23:56:46,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:46,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:56:46,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240628618] [2020-10-14 23:56:46,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:56:46,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:46,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:56:46,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:56:46,122 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 7 states. [2020-10-14 23:56:46,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:46,203 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-10-14 23:56:46,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:56:46,205 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-14 23:56:46,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:46,206 INFO L225 Difference]: With dead ends: 23 [2020-10-14 23:56:46,209 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 23:56:46,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:56:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 23:56:46,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-14 23:56:46,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-14 23:56:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-14 23:56:46,219 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2020-10-14 23:56:46,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:46,220 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-14 23:56:46,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:56:46,221 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-14 23:56:46,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 23:56:46,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:46,221 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:46,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:56:46,223 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:46,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:46,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1252681079, now seen corresponding path program 2 times [2020-10-14 23:56:46,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:46,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493135543] [2020-10-14 23:56:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:46,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:46,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:46,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 23:56:46,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:46,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-14 23:56:46,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:46,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:46,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:56:46,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:46,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:56:46,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:46,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:46,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:46,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:46,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:46,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:46,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:56:46,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:46,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:46,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:46,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:46,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:46,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:46,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493135543] [2020-10-14 23:56:46,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:46,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:56:46,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150903095] [2020-10-14 23:56:46,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:56:46,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:46,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:56:46,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:56:46,413 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2020-10-14 23:56:46,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:46,477 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-10-14 23:56:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:56:46,477 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-14 23:56:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:46,478 INFO L225 Difference]: With dead ends: 30 [2020-10-14 23:56:46,479 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 23:56:46,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:56:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 23:56:46,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-10-14 23:56:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 23:56:46,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-14 23:56:46,491 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2020-10-14 23:56:46,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:46,492 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-14 23:56:46,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:56:46,492 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-14 23:56:46,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 23:56:46,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:46,493 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:46,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:56:46,494 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:46,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:46,494 INFO L82 PathProgramCache]: Analyzing trace with hash 798413126, now seen corresponding path program 2 times [2020-10-14 23:56:46,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:46,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74391572] [2020-10-14 23:56:46,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:46,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:46,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:46,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 23:56:46,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:46,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-14 23:56:46,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:46,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:46,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:56:46,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:46,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:56:46,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:46,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:46,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:46,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:46,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:46,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:46,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:46,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:46,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:46,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:46,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:46,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:46,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:46,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74391572] [2020-10-14 23:56:46,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:46,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:56:46,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575648288] [2020-10-14 23:56:46,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:56:46,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:46,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:56:46,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:56:46,690 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2020-10-14 23:56:46,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:46,756 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-14 23:56:46,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:56:46,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-14 23:56:46,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:46,759 INFO L225 Difference]: With dead ends: 27 [2020-10-14 23:56:46,759 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 23:56:46,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:56:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 23:56:46,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-14 23:56:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-14 23:56:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-14 23:56:46,769 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-10-14 23:56:46,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:46,770 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-14 23:56:46,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:56:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-14 23:56:46,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 23:56:46,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:46,771 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:46,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:56:46,774 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:46,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:46,775 INFO L82 PathProgramCache]: Analyzing trace with hash 213945541, now seen corresponding path program 3 times [2020-10-14 23:56:46,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:46,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458869976] [2020-10-14 23:56:46,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:46,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:46,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:46,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 23:56:46,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:46,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-14 23:56:46,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:46,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:46,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:56:46,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:46,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:56:46,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:46,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:46,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:46,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:46,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:46,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:46,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 23:56:46,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:46,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:46,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:46,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:46,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:46,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:47,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458869976] [2020-10-14 23:56:47,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:47,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:56:47,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054175907] [2020-10-14 23:56:47,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:56:47,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:47,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:56:47,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:56:47,004 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 7 states. [2020-10-14 23:56:47,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:47,088 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-10-14 23:56:47,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:56:47,088 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-14 23:56:47,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:47,089 INFO L225 Difference]: With dead ends: 26 [2020-10-14 23:56:47,089 INFO L226 Difference]: Without dead ends: 21 [2020-10-14 23:56:47,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:56:47,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-14 23:56:47,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-14 23:56:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 23:56:47,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-14 23:56:47,098 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-14 23:56:47,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:47,098 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-14 23:56:47,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:56:47,099 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-14 23:56:47,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 23:56:47,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:47,099 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:47,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:56:47,100 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:47,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:47,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1883118234, now seen corresponding path program 3 times [2020-10-14 23:56:47,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:47,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492048397] [2020-10-14 23:56:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:47,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:47,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:47,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 23:56:47,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:47,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-14 23:56:47,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:47,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:47,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:56:47,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:47,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:56:47,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:47,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:47,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:47,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:47,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:47,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:47,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:47,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:47,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:47,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:47,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:47,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:47,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:47,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492048397] [2020-10-14 23:56:47,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:47,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:56:47,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422336687] [2020-10-14 23:56:47,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:56:47,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:47,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:56:47,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:56:47,247 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2020-10-14 23:56:47,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:47,310 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-10-14 23:56:47,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:56:47,310 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-14 23:56:47,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:47,311 INFO L225 Difference]: With dead ends: 31 [2020-10-14 23:56:47,311 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 23:56:47,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:56:47,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 23:56:47,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2020-10-14 23:56:47,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 23:56:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-14 23:56:47,317 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2020-10-14 23:56:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:47,318 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-14 23:56:47,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:56:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-14 23:56:47,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:56:47,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:47,319 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:47,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:56:47,319 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:47,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:47,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1922085065, now seen corresponding path program 4 times [2020-10-14 23:56:47,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:47,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035007350] [2020-10-14 23:56:47,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:47,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:47,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:47,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:56:47,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:47,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-14 23:56:47,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:47,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:47,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:56:47,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:47,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:56:47,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:47,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:47,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:47,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:47,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:47,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:47,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:47,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:47,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:47,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:47,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:47,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:47,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:47,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035007350] [2020-10-14 23:56:47,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:47,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:56:47,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876428326] [2020-10-14 23:56:47,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:56:47,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:47,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:56:47,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:56:47,592 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 8 states. [2020-10-14 23:56:47,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:47,662 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-10-14 23:56:47,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:56:47,662 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-14 23:56:47,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:47,664 INFO L225 Difference]: With dead ends: 28 [2020-10-14 23:56:47,664 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 23:56:47,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:56:47,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 23:56:47,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-14 23:56:47,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 23:56:47,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-14 23:56:47,670 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2020-10-14 23:56:47,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:47,671 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-14 23:56:47,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:56:47,671 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-14 23:56:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:56:47,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:47,672 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:47,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:56:47,672 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:47,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:47,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1788414646, now seen corresponding path program 5 times [2020-10-14 23:56:47,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:47,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779988838] [2020-10-14 23:56:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:47,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:47,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:47,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:56:47,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:47,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-14 23:56:47,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:47,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:56:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:56:47,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:47,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:47,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:47,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:47,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:47,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:47,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:47,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:47,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:47,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:47,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:47,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:47,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:47,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779988838] [2020-10-14 23:56:47,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:47,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:56:47,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650861447] [2020-10-14 23:56:47,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:56:47,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:47,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:56:47,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:56:47,865 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2020-10-14 23:56:47,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:47,959 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-14 23:56:47,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:56:47,959 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-14 23:56:47,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:47,960 INFO L225 Difference]: With dead ends: 33 [2020-10-14 23:56:47,960 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 23:56:47,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:56:47,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 23:56:47,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2020-10-14 23:56:47,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 23:56:47,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-14 23:56:47,966 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2020-10-14 23:56:47,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:47,966 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-14 23:56:47,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:56:47,966 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-14 23:56:47,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:56:47,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:47,967 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:47,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:56:47,968 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:47,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:47,968 INFO L82 PathProgramCache]: Analyzing trace with hash -308649129, now seen corresponding path program 4 times [2020-10-14 23:56:47,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:47,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396516631] [2020-10-14 23:56:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:47,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:48,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:48,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:56:48,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:48,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-14 23:56:48,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:48,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:48,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:56:48,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:48,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:56:48,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:48,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:48,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:48,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:48,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:48,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:48,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:48,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:48,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:48,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:48,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:48,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:48,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:48,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396516631] [2020-10-14 23:56:48,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:48,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:56:48,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499765228] [2020-10-14 23:56:48,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:56:48,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:48,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:56:48,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:56:48,138 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2020-10-14 23:56:48,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:48,212 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-10-14 23:56:48,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:56:48,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-14 23:56:48,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:48,213 INFO L225 Difference]: With dead ends: 38 [2020-10-14 23:56:48,213 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 23:56:48,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:56:48,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 23:56:48,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2020-10-14 23:56:48,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 23:56:48,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-14 23:56:48,219 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2020-10-14 23:56:48,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:48,219 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-14 23:56:48,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:56:48,219 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-14 23:56:48,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:56:48,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:48,220 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:48,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:56:48,221 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:48,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:48,221 INFO L82 PathProgramCache]: Analyzing trace with hash 580442885, now seen corresponding path program 6 times [2020-10-14 23:56:48,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:48,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886723953] [2020-10-14 23:56:48,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:48,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:48,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:48,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:56:48,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:48,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-14 23:56:48,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:48,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:56:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:56:48,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:48,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:48,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:48,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:48,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:48,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:48,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:48,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:48,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:48,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:48,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:48,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:48,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:48,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886723953] [2020-10-14 23:56:48,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:48,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:56:48,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585770117] [2020-10-14 23:56:48,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:56:48,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:48,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:56:48,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:56:48,408 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2020-10-14 23:56:48,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:48,486 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-14 23:56:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:56:48,487 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-14 23:56:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:48,488 INFO L225 Difference]: With dead ends: 32 [2020-10-14 23:56:48,488 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 23:56:48,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:56:48,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 23:56:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 23:56:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 23:56:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-14 23:56:48,492 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2020-10-14 23:56:48,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:48,493 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-14 23:56:48,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:56:48,493 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-14 23:56:48,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:56:48,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:48,494 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:48,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:56:48,494 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:48,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:48,494 INFO L82 PathProgramCache]: Analyzing trace with hash -358183066, now seen corresponding path program 7 times [2020-10-14 23:56:48,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:48,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181492660] [2020-10-14 23:56:48,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:48,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:48,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:48,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:56:48,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:48,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-14 23:56:48,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:48,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:48,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:56:48,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:48,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:56:48,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:48,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:48,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:48,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:48,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:48,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:48,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:48,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:48,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:48,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:48,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:48,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:48,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:48,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181492660] [2020-10-14 23:56:48,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:48,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:56:48,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607436126] [2020-10-14 23:56:48,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:56:48,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:48,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:56:48,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:56:48,798 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 9 states. [2020-10-14 23:56:48,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:48,896 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-10-14 23:56:48,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:56:48,900 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-14 23:56:48,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:48,901 INFO L225 Difference]: With dead ends: 31 [2020-10-14 23:56:48,901 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 23:56:48,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:56:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 23:56:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-14 23:56:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 23:56:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-14 23:56:48,909 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2020-10-14 23:56:48,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:48,910 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-14 23:56:48,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:56:48,910 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-14 23:56:48,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:56:48,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:48,911 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:48,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:56:48,912 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:48,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:48,912 INFO L82 PathProgramCache]: Analyzing trace with hash -942650651, now seen corresponding path program 8 times [2020-10-14 23:56:48,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:48,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391995816] [2020-10-14 23:56:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:48,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:49,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:49,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:56:49,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:49,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-14 23:56:49,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:49,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:49,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:56:49,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:49,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:56:49,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:49,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:49,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:49,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:49,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:49,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:49,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:49,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:49,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:49,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:49,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:49,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:49,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:49,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391995816] [2020-10-14 23:56:49,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:49,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:56:49,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581832701] [2020-10-14 23:56:49,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:56:49,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:49,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:56:49,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:56:49,148 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 9 states. [2020-10-14 23:56:49,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:49,246 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-10-14 23:56:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:56:49,247 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-14 23:56:49,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:49,247 INFO L225 Difference]: With dead ends: 34 [2020-10-14 23:56:49,247 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 23:56:49,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:56:49,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 23:56:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2020-10-14 23:56:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 23:56:49,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-14 23:56:49,252 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2020-10-14 23:56:49,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:49,253 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-14 23:56:49,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:56:49,253 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-14 23:56:49,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:56:49,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:49,254 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:49,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:56:49,254 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:49,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:49,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1255252870, now seen corresponding path program 5 times [2020-10-14 23:56:49,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:49,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815666334] [2020-10-14 23:56:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:49,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:49,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:49,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:56:49,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:49,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-14 23:56:49,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:49,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:49,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:56:49,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:49,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:56:49,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:49,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:49,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:49,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:49,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:49,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:49,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:49,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:49,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:49,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:49,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:49,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815666334] [2020-10-14 23:56:49,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:49,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:56:49,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84956729] [2020-10-14 23:56:49,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:56:49,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:49,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:56:49,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:56:49,477 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 9 states. [2020-10-14 23:56:49,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:49,551 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-14 23:56:49,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:56:49,552 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-14 23:56:49,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:49,553 INFO L225 Difference]: With dead ends: 39 [2020-10-14 23:56:49,553 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 23:56:49,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:56:49,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 23:56:49,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2020-10-14 23:56:49,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 23:56:49,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-14 23:56:49,558 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2020-10-14 23:56:49,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:49,558 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-14 23:56:49,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:56:49,558 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-14 23:56:49,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:56:49,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:49,559 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:49,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:56:49,559 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:49,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:49,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1816764598, now seen corresponding path program 9 times [2020-10-14 23:56:49,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:49,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667016942] [2020-10-14 23:56:49,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:49,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:49,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:49,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:56:49,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:49,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-14 23:56:49,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:49,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:49,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:56:49,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:49,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:56:49,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:50,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:50,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:50,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:50,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:50,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:50,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:50,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:50,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:50,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:50,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:50,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:50,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:50,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667016942] [2020-10-14 23:56:50,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:50,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:56:50,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720475575] [2020-10-14 23:56:50,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:56:50,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:50,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:56:50,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:56:50,174 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 11 states. [2020-10-14 23:56:50,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:50,291 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-10-14 23:56:50,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:56:50,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-10-14 23:56:50,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:50,292 INFO L225 Difference]: With dead ends: 33 [2020-10-14 23:56:50,292 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 23:56:50,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:56:50,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 23:56:50,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-14 23:56:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 23:56:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-14 23:56:50,298 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 18 [2020-10-14 23:56:50,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:50,298 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-14 23:56:50,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:56:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-14 23:56:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:56:50,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:50,300 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:50,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:56:50,300 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:50,300 INFO L82 PathProgramCache]: Analyzing trace with hash 878138647, now seen corresponding path program 10 times [2020-10-14 23:56:50,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:50,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663791605] [2020-10-14 23:56:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:50,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:50,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:50,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:56:50,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:50,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-14 23:56:50,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:50,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:50,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:56:50,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:50,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:56:50,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:50,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:50,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:50,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:50,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:50,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:50,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:50,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:50,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:50,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:50,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663791605] [2020-10-14 23:56:50,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:50,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:56:50,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424945252] [2020-10-14 23:56:50,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:56:50,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:50,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:56:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:56:50,553 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 10 states. [2020-10-14 23:56:50,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:50,703 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-14 23:56:50,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:56:50,704 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-14 23:56:50,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:50,704 INFO L225 Difference]: With dead ends: 39 [2020-10-14 23:56:50,705 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 23:56:50,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:56:50,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 23:56:50,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2020-10-14 23:56:50,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 23:56:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-14 23:56:50,710 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 18 [2020-10-14 23:56:50,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:50,711 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-14 23:56:50,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:56:50,711 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-14 23:56:50,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:56:50,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:50,712 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:50,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:56:50,712 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:50,713 INFO L82 PathProgramCache]: Analyzing trace with hash 293671062, now seen corresponding path program 11 times [2020-10-14 23:56:50,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:50,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10089307] [2020-10-14 23:56:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:50,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:50,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:50,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:56:50,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:50,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-14 23:56:50,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:50,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:50,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:56:50,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:50,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:56:50,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:50,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:50,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:50,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:50,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:50,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:50,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:50,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:50,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:50,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:50,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:50,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:50,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:50,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10089307] [2020-10-14 23:56:50,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:50,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:56:50,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360810892] [2020-10-14 23:56:50,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:56:50,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:50,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:56:50,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:56:50,973 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 10 states. [2020-10-14 23:56:51,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:51,103 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-14 23:56:51,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:56:51,104 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-14 23:56:51,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:51,104 INFO L225 Difference]: With dead ends: 42 [2020-10-14 23:56:51,104 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 23:56:51,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:56:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 23:56:51,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2020-10-14 23:56:51,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 23:56:51,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-14 23:56:51,111 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 18 [2020-10-14 23:56:51,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:51,111 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-14 23:56:51,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:56:51,111 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-14 23:56:51,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:56:51,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:51,112 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:51,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:56:51,112 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:51,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:51,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1803392713, now seen corresponding path program 6 times [2020-10-14 23:56:51,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:51,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672774850] [2020-10-14 23:56:51,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:51,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:51,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:51,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:56:51,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:51,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-14 23:56:51,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:51,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:51,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:56:51,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:51,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:56:51,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:51,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:51,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:51,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:51,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:51,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:51,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:51,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:51,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:51,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:51,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:51,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:51,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:51,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672774850] [2020-10-14 23:56:51,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:51,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:56:51,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314035794] [2020-10-14 23:56:51,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:56:51,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:51,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:56:51,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:56:51,392 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 10 states. [2020-10-14 23:56:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:51,518 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-14 23:56:51,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:56:51,519 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-14 23:56:51,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:51,520 INFO L225 Difference]: With dead ends: 47 [2020-10-14 23:56:51,520 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 23:56:51,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:56:51,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 23:56:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2020-10-14 23:56:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 23:56:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-14 23:56:51,526 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-10-14 23:56:51,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:51,526 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-14 23:56:51,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:56:51,527 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-14 23:56:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:56:51,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:51,527 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:51,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:56:51,528 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:51,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:51,528 INFO L82 PathProgramCache]: Analyzing trace with hash 520665446, now seen corresponding path program 12 times [2020-10-14 23:56:51,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:51,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474151370] [2020-10-14 23:56:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:51,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:51,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:51,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:56:51,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:51,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-14 23:56:51,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:51,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:51,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:56:51,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:51,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:56:51,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:51,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:51,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:51,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:51,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:51,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:51,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:51,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:51,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:51,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:51,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:51,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474151370] [2020-10-14 23:56:51,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:51,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:56:51,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055200215] [2020-10-14 23:56:51,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:56:51,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:51,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:56:51,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:56:51,786 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 10 states. [2020-10-14 23:56:51,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:51,890 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-14 23:56:51,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:56:51,891 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-14 23:56:51,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:51,892 INFO L225 Difference]: With dead ends: 37 [2020-10-14 23:56:51,892 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 23:56:51,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:56:51,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 23:56:51,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-14 23:56:51,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 23:56:51,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-14 23:56:51,898 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2020-10-14 23:56:51,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:51,898 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-14 23:56:51,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:56:51,898 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-14 23:56:51,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:56:51,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:51,900 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:51,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:56:51,900 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:51,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1488032037, now seen corresponding path program 13 times [2020-10-14 23:56:51,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:51,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649209573] [2020-10-14 23:56:51,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:51,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:52,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:52,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:56:52,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:52,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-14 23:56:52,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:52,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:52,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:56:52,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:52,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:56:52,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:52,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:52,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:52,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:52,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:52,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:52,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:52,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:52,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:52,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:52,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:52,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:52,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:52,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649209573] [2020-10-14 23:56:52,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:52,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:56:52,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765620167] [2020-10-14 23:56:52,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:56:52,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:52,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:56:52,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:56:52,231 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 11 states. [2020-10-14 23:56:52,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:52,373 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-10-14 23:56:52,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:56:52,373 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-14 23:56:52,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:52,374 INFO L225 Difference]: With dead ends: 36 [2020-10-14 23:56:52,374 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 23:56:52,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:56:52,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 23:56:52,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-10-14 23:56:52,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 23:56:52,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-14 23:56:52,384 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-10-14 23:56:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:52,384 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-14 23:56:52,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:56:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-14 23:56:52,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:56:52,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:52,385 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:52,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:56:52,385 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:52,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:52,386 INFO L82 PathProgramCache]: Analyzing trace with hash 549406086, now seen corresponding path program 14 times [2020-10-14 23:56:52,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:52,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577537587] [2020-10-14 23:56:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:52,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:52,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:52,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:56:52,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:52,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-14 23:56:52,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:52,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:52,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:56:52,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:52,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:56:52,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:52,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:52,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:52,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:52,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:52,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:52,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:52,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:52,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:52,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:52,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:52,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:52,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:52,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577537587] [2020-10-14 23:56:52,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:52,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:56:52,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368953662] [2020-10-14 23:56:52,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:56:52,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:52,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:56:52,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:56:52,703 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 11 states. [2020-10-14 23:56:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:52,858 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-14 23:56:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:56:52,860 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-14 23:56:52,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:52,861 INFO L225 Difference]: With dead ends: 40 [2020-10-14 23:56:52,861 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 23:56:52,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:56:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 23:56:52,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-10-14 23:56:52,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 23:56:52,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-14 23:56:52,875 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-10-14 23:56:52,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:52,875 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-14 23:56:52,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:56:52,875 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-14 23:56:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:56:52,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:52,876 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:52,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:56:52,876 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:52,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:52,877 INFO L82 PathProgramCache]: Analyzing trace with hash -35061499, now seen corresponding path program 15 times [2020-10-14 23:56:52,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:52,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197312757] [2020-10-14 23:56:52,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:52,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:53,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:53,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:56:53,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:53,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-14 23:56:53,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:53,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:53,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:56:53,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:53,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:56:53,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:53,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:53,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:53,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:53,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:53,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:53,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:53,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:53,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:53,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:53,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:53,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:53,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:53,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197312757] [2020-10-14 23:56:53,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:53,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:56:53,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694622524] [2020-10-14 23:56:53,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:56:53,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:53,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:56:53,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:56:53,179 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 11 states. [2020-10-14 23:56:53,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:53,333 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-10-14 23:56:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:56:53,334 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-14 23:56:53,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:53,335 INFO L225 Difference]: With dead ends: 43 [2020-10-14 23:56:53,335 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 23:56:53,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:56:53,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 23:56:53,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2020-10-14 23:56:53,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 23:56:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-14 23:56:53,353 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-10-14 23:56:53,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:53,354 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-14 23:56:53,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:56:53,354 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-14 23:56:53,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:56:53,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:53,357 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:53,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:56:53,358 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:53,360 INFO L82 PathProgramCache]: Analyzing trace with hash -2132125274, now seen corresponding path program 7 times [2020-10-14 23:56:53,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:53,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670418478] [2020-10-14 23:56:53,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:53,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:53,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:53,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:56:53,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:53,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-14 23:56:53,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:53,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:53,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:56:53,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:53,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:56:53,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:53,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:53,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:53,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:53,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:53,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:53,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:56:53,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:53,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:53,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:53,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:53,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:53,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:56:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:53,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670418478] [2020-10-14 23:56:53,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:53,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:56:53,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615120933] [2020-10-14 23:56:53,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:56:53,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:53,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:56:53,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:56:53,810 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 11 states. [2020-10-14 23:56:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:53,982 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-10-14 23:56:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:56:53,983 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-14 23:56:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:53,984 INFO L225 Difference]: With dead ends: 48 [2020-10-14 23:56:53,984 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 23:56:53,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:56:53,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 23:56:53,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2020-10-14 23:56:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 23:56:53,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-14 23:56:53,998 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 19 [2020-10-14 23:56:53,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:53,998 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-14 23:56:53,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:56:53,999 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-14 23:56:54,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:56:54,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:54,004 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:54,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:56:54,007 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:54,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:54,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1080109353, now seen corresponding path program 16 times [2020-10-14 23:56:54,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:54,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269463041] [2020-10-14 23:56:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:54,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:54,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:54,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:56:54,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:54,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-14 23:56:54,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:54,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:54,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:56:54,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:54,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:56:54,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:54,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:54,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:54,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:54,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:54,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:54,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:54,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:54,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:54,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:54,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:54,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:54,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:54,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269463041] [2020-10-14 23:56:54,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:54,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:56:54,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194740] [2020-10-14 23:56:54,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:56:54,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:54,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:56:54,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:56:54,475 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 10 states. [2020-10-14 23:56:54,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:54,570 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-14 23:56:54,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:56:54,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-14 23:56:54,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:54,571 INFO L225 Difference]: With dead ends: 38 [2020-10-14 23:56:54,571 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 23:56:54,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:56:54,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 23:56:54,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-14 23:56:54,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 23:56:54,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-14 23:56:54,581 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2020-10-14 23:56:54,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:54,582 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-14 23:56:54,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:56:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-14 23:56:54,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:56:54,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:54,582 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:54,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:56:54,583 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:54,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:54,583 INFO L82 PathProgramCache]: Analyzing trace with hash -112742762, now seen corresponding path program 17 times [2020-10-14 23:56:54,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:54,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548880747] [2020-10-14 23:56:54,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:54,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:54,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:54,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:56:54,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:54,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-14 23:56:54,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:54,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:54,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:56:54,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:54,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:56:54,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:54,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:54,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:54,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:54,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:54,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:54,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:54,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:54,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:54,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:54,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:54,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:54,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:54,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548880747] [2020-10-14 23:56:54,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:54,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:56:54,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42328017] [2020-10-14 23:56:54,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:56:54,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:54,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:56:54,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:56:54,955 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 12 states. [2020-10-14 23:56:55,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:55,177 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-14 23:56:55,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:56:55,177 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-14 23:56:55,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:55,178 INFO L225 Difference]: With dead ends: 45 [2020-10-14 23:56:55,178 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 23:56:55,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:56:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 23:56:55,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2020-10-14 23:56:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 23:56:55,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-14 23:56:55,188 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2020-10-14 23:56:55,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:55,189 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-14 23:56:55,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:56:55,189 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-14 23:56:55,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:56:55,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:55,190 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:55,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:56:55,190 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:55,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:55,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1051368713, now seen corresponding path program 18 times [2020-10-14 23:56:55,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:55,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451166878] [2020-10-14 23:56:55,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:55,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:55,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:55,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:56:55,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:55,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-14 23:56:55,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:55,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:55,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:56:55,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:55,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:56:55,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:55,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:55,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:55,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:55,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:55,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:55,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:55,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:55,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:55,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:55,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:55,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:55,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:55,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451166878] [2020-10-14 23:56:55,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:55,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:56:55,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311520005] [2020-10-14 23:56:55,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:56:55,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:55,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:56:55,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:56:55,567 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 12 states. [2020-10-14 23:56:55,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:55,810 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-10-14 23:56:55,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:56:55,811 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-14 23:56:55,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:55,812 INFO L225 Difference]: With dead ends: 49 [2020-10-14 23:56:55,812 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 23:56:55,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:56:55,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 23:56:55,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2020-10-14 23:56:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 23:56:55,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-14 23:56:55,822 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2020-10-14 23:56:55,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:55,823 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-14 23:56:55,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:56:55,823 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-14 23:56:55,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:56:55,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:55,826 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:55,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:56:55,826 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:55,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:55,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1635836298, now seen corresponding path program 19 times [2020-10-14 23:56:55,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:55,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452138772] [2020-10-14 23:56:55,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:55,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:56,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:56,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:56:56,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:56,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-14 23:56:56,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:56,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:56,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:56:56,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:56,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:56:56,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:56,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:56,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:56,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:56,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:56,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:56,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:56,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:56,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:56,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:56,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:56,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:56,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:56:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:56,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452138772] [2020-10-14 23:56:56,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:56,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:56:56,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422372216] [2020-10-14 23:56:56,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:56:56,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:56,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:56:56,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:56:56,258 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 12 states. [2020-10-14 23:56:56,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:56,461 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-10-14 23:56:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:56:56,462 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-14 23:56:56,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:56,462 INFO L225 Difference]: With dead ends: 52 [2020-10-14 23:56:56,462 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 23:56:56,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:56:56,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 23:56:56,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2020-10-14 23:56:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 23:56:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-14 23:56:56,471 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2020-10-14 23:56:56,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:56,472 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-14 23:56:56,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:56:56,472 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-14 23:56:56,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:56:56,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:56,472 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:56,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:56:56,473 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:56,473 INFO L82 PathProgramCache]: Analyzing trace with hash 562067223, now seen corresponding path program 8 times [2020-10-14 23:56:56,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:56,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189322620] [2020-10-14 23:56:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:56,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:56,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:56,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:56:56,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:56,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-14 23:56:56,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:56,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:56,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:56:56,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:56,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:56:56,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:56,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:56,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:56,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:56,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:56,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:56,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:56,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:56,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:56,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:56,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:56,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:56,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:56,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189322620] [2020-10-14 23:56:56,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:56,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:56:56,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681689453] [2020-10-14 23:56:56,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:56:56,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:56,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:56:56,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:56:56,855 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 12 states. [2020-10-14 23:56:57,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:57,012 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2020-10-14 23:56:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:56:57,013 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-14 23:56:57,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:57,014 INFO L225 Difference]: With dead ends: 57 [2020-10-14 23:56:57,014 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 23:56:57,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:56:57,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 23:56:57,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 32. [2020-10-14 23:56:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 23:56:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-10-14 23:56:57,023 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 20 [2020-10-14 23:56:57,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:57,024 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-10-14 23:56:57,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:56:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-10-14 23:56:57,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:56:57,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:57,024 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:57,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:56:57,025 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:57,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:57,025 INFO L82 PathProgramCache]: Analyzing trace with hash 911886181, now seen corresponding path program 20 times [2020-10-14 23:56:57,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:57,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574825463] [2020-10-14 23:56:57,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:57,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:57,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:57,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:56:57,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:57,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-14 23:56:57,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:57,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:57,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:56:57,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:57,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:56:57,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:57,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:57,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:57,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:57,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:57,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:57,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:57,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:57,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:57,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:57,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:57,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:57,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:57,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574825463] [2020-10-14 23:56:57,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:57,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:56:57,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264727956] [2020-10-14 23:56:57,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:56:57,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:57,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:56:57,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:56:57,370 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 12 states. [2020-10-14 23:56:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:57,536 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-10-14 23:56:57,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:56:57,537 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-14 23:56:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:57,537 INFO L225 Difference]: With dead ends: 42 [2020-10-14 23:56:57,538 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 23:56:57,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:56:57,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 23:56:57,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-14 23:56:57,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 23:56:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-14 23:56:57,546 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 21 [2020-10-14 23:56:57,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:57,546 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-14 23:56:57,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:56:57,547 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-14 23:56:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:56:57,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:57,547 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:57,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:56:57,547 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:57,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:57,548 INFO L82 PathProgramCache]: Analyzing trace with hash 835479430, now seen corresponding path program 21 times [2020-10-14 23:56:57,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:57,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833469204] [2020-10-14 23:56:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:57,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:57,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:57,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:56:57,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:57,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-14 23:56:57,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:57,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:57,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:56:57,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:57,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:56:57,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:57,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:57,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:57,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:57,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:57,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:57,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:57,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:57,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:57,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:57,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:57,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:57,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:57,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833469204] [2020-10-14 23:56:57,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:57,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:56:57,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228204519] [2020-10-14 23:56:57,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:56:57,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:57,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:56:57,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:56:57,978 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 13 states. [2020-10-14 23:56:58,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:58,173 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-10-14 23:56:58,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:56:58,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-14 23:56:58,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:58,175 INFO L225 Difference]: With dead ends: 41 [2020-10-14 23:56:58,175 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 23:56:58,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:56:58,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 23:56:58,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-10-14 23:56:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:56:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-14 23:56:58,182 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2020-10-14 23:56:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:58,183 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-14 23:56:58,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:56:58,183 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-14 23:56:58,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:56:58,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:58,183 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:58,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:56:58,184 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:58,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:58,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1802846021, now seen corresponding path program 22 times [2020-10-14 23:56:58,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:58,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027442540] [2020-10-14 23:56:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:58,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:58,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:58,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:56:58,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:58,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-14 23:56:58,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:58,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:58,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:56:58,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:58,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:56:58,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:58,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:58,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:58,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:58,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:58,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:58,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:56:58,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:58,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:58,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:58,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:58,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:58,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:56:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:58,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027442540] [2020-10-14 23:56:58,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:58,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:56:58,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165650752] [2020-10-14 23:56:58,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:56:58,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:58,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:56:58,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:56:58,588 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 13 states. [2020-10-14 23:56:58,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:58,836 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-14 23:56:58,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:56:58,837 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-14 23:56:58,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:58,837 INFO L225 Difference]: With dead ends: 46 [2020-10-14 23:56:58,837 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 23:56:58,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:56:58,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 23:56:58,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2020-10-14 23:56:58,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:56:58,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-14 23:56:58,848 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2020-10-14 23:56:58,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:58,848 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-14 23:56:58,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:56:58,848 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-14 23:56:58,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:56:58,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:58,848 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:58,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:56:58,849 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:58,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:58,849 INFO L82 PathProgramCache]: Analyzing trace with hash 864220070, now seen corresponding path program 23 times [2020-10-14 23:56:58,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:58,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070695799] [2020-10-14 23:56:58,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:58,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:59,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:59,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:56:59,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:59,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-14 23:56:59,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:59,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:59,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:56:59,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:59,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:56:59,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:59,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:59,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:59,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:59,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:59,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:59,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:56:59,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:59,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:59,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:59,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:59,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:59,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:59,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070695799] [2020-10-14 23:56:59,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:59,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:56:59,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405202262] [2020-10-14 23:56:59,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:56:59,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:59,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:56:59,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:56:59,270 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 13 states. [2020-10-14 23:56:59,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:56:59,505 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-14 23:56:59,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:56:59,506 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-14 23:56:59,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:56:59,507 INFO L225 Difference]: With dead ends: 50 [2020-10-14 23:56:59,507 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 23:56:59,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:56:59,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 23:56:59,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2020-10-14 23:56:59,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:56:59,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-14 23:56:59,519 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2020-10-14 23:56:59,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:56:59,521 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-14 23:56:59,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:56:59,521 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-14 23:56:59,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:56:59,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:56:59,522 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:56:59,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:56:59,522 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:56:59,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:56:59,523 INFO L82 PathProgramCache]: Analyzing trace with hash 279752485, now seen corresponding path program 24 times [2020-10-14 23:56:59,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:56:59,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535321937] [2020-10-14 23:56:59,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:56:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:59,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:59,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:59,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:56:59,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:59,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-14 23:56:59,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:59,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:59,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:56:59,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:56:59,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:56:59,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:59,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:56:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:56:59,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:56:59,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:56:59,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:56:59,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:56:59,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:56:59,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:56:59,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:56:59,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:56:59,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:56:59,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:56:59,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:56:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:56:59,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535321937] [2020-10-14 23:56:59,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:56:59,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:56:59,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063362339] [2020-10-14 23:56:59,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:56:59,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:56:59,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:56:59,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:56:59,934 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 13 states. [2020-10-14 23:57:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:00,144 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-10-14 23:57:00,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:57:00,144 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-14 23:57:00,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:00,145 INFO L225 Difference]: With dead ends: 53 [2020-10-14 23:57:00,145 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 23:57:00,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:57:00,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 23:57:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-10-14 23:57:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:57:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-14 23:57:00,156 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2020-10-14 23:57:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:00,156 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-14 23:57:00,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:57:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-14 23:57:00,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:57:00,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:00,157 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:00,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:57:00,157 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:00,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:00,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1817311290, now seen corresponding path program 9 times [2020-10-14 23:57:00,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:00,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621765014] [2020-10-14 23:57:00,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:00,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:00,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:00,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:57:00,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:00,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-14 23:57:00,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:00,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:00,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:57:00,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:00,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:57:00,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:00,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:00,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:00,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:00,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:00,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:00,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:00,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:00,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:00,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:00,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:00,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:00,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:00,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621765014] [2020-10-14 23:57:00,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:00,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:57:00,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641608453] [2020-10-14 23:57:00,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:57:00,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:00,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:57:00,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:57:00,592 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 13 states. [2020-10-14 23:57:00,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:00,769 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2020-10-14 23:57:00,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:57:00,769 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-14 23:57:00,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:00,770 INFO L225 Difference]: With dead ends: 58 [2020-10-14 23:57:00,770 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 23:57:00,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:57:00,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 23:57:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2020-10-14 23:57:00,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 23:57:00,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-14 23:57:00,778 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2020-10-14 23:57:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:00,778 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-14 23:57:00,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:57:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-14 23:57:00,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:57:00,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:00,779 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:00,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:57:00,779 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:00,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:00,779 INFO L82 PathProgramCache]: Analyzing trace with hash 165596310, now seen corresponding path program 25 times [2020-10-14 23:57:00,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:00,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215204345] [2020-10-14 23:57:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:00,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:01,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:01,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:57:01,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:01,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-14 23:57:01,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:01,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:01,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:57:01,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:01,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:57:01,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:01,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:01,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:01,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:01,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:01,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:01,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:01,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:01,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:01,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:01,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:01,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:01,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:01,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215204345] [2020-10-14 23:57:01,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:01,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:57:01,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974315905] [2020-10-14 23:57:01,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:57:01,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:01,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:57:01,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:57:01,282 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 11 states. [2020-10-14 23:57:01,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:01,406 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-14 23:57:01,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:57:01,406 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-14 23:57:01,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:01,407 INFO L225 Difference]: With dead ends: 43 [2020-10-14 23:57:01,407 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 23:57:01,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:57:01,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 23:57:01,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-10-14 23:57:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 23:57:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-14 23:57:01,416 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 22 [2020-10-14 23:57:01,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:01,416 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-14 23:57:01,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:57:01,417 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-14 23:57:01,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:57:01,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:01,417 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:01,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:57:01,417 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:01,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:01,418 INFO L82 PathProgramCache]: Analyzing trace with hash 89189559, now seen corresponding path program 26 times [2020-10-14 23:57:01,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:01,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425117145] [2020-10-14 23:57:01,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:01,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:01,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:01,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:57:01,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:01,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-14 23:57:01,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:01,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:01,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:57:01,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:01,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:57:01,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:01,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:01,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:01,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:01,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:01,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:01,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:01,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:01,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:01,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:01,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:01,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:01,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:01,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425117145] [2020-10-14 23:57:01,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:01,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:57:01,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639028558] [2020-10-14 23:57:01,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:57:01,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:01,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:57:01,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:57:01,831 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 14 states. [2020-10-14 23:57:02,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:02,125 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-10-14 23:57:02,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:57:02,126 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-14 23:57:02,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:02,127 INFO L225 Difference]: With dead ends: 51 [2020-10-14 23:57:02,127 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 23:57:02,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:57:02,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 23:57:02,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-10-14 23:57:02,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 23:57:02,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-14 23:57:02,140 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 22 [2020-10-14 23:57:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:02,140 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-14 23:57:02,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:57:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-14 23:57:02,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:57:02,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:02,141 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:02,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:57:02,141 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:02,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1056556150, now seen corresponding path program 27 times [2020-10-14 23:57:02,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:02,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076533747] [2020-10-14 23:57:02,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:02,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:02,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:02,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:57:02,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:02,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-14 23:57:02,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:02,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:02,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:57:02,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:02,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:57:02,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:02,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:02,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:02,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:02,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:02,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:02,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:02,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:02,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:02,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:02,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:02,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:02,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:02,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076533747] [2020-10-14 23:57:02,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:02,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:57:02,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961201986] [2020-10-14 23:57:02,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:57:02,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:02,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:57:02,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:57:02,548 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 14 states. [2020-10-14 23:57:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:02,864 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-14 23:57:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:57:02,865 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-14 23:57:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:02,866 INFO L225 Difference]: With dead ends: 56 [2020-10-14 23:57:02,866 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 23:57:02,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:57:02,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 23:57:02,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2020-10-14 23:57:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 23:57:02,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-14 23:57:02,876 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 22 [2020-10-14 23:57:02,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:02,876 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-14 23:57:02,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:57:02,876 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-14 23:57:02,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:57:02,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:02,877 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:02,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:57:02,877 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:02,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:02,877 INFO L82 PathProgramCache]: Analyzing trace with hash 117930199, now seen corresponding path program 28 times [2020-10-14 23:57:02,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:02,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690973381] [2020-10-14 23:57:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:02,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:03,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:03,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:57:03,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:03,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-14 23:57:03,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:03,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:03,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:57:03,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:03,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:57:03,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:03,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:03,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:03,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:03,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:03,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:03,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:03,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:03,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:03,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:03,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:03,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:03,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:03,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690973381] [2020-10-14 23:57:03,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:03,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:57:03,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720301861] [2020-10-14 23:57:03,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:57:03,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:03,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:57:03,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:57:03,375 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 14 states. [2020-10-14 23:57:03,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:03,657 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-14 23:57:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:57:03,658 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-14 23:57:03,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:03,659 INFO L225 Difference]: With dead ends: 60 [2020-10-14 23:57:03,659 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 23:57:03,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:57:03,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 23:57:03,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2020-10-14 23:57:03,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 23:57:03,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-14 23:57:03,669 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 22 [2020-10-14 23:57:03,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:03,670 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-14 23:57:03,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:57:03,670 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-14 23:57:03,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:57:03,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:03,671 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:03,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 23:57:03,671 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:03,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:03,671 INFO L82 PathProgramCache]: Analyzing trace with hash -466537386, now seen corresponding path program 29 times [2020-10-14 23:57:03,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:03,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221396900] [2020-10-14 23:57:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:03,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:03,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:03,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:57:03,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:03,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-14 23:57:03,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:03,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:03,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:57:03,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:03,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:57:03,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:04,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:04,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:04,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:04,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:04,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:04,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:04,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:04,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:04,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:04,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:04,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:04,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:04,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221396900] [2020-10-14 23:57:04,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:04,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:57:04,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397817806] [2020-10-14 23:57:04,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:57:04,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:04,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:57:04,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:57:04,059 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 14 states. [2020-10-14 23:57:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:04,287 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-10-14 23:57:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:57:04,287 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-14 23:57:04,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:04,288 INFO L225 Difference]: With dead ends: 63 [2020-10-14 23:57:04,288 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 23:57:04,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:57:04,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 23:57:04,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 34. [2020-10-14 23:57:04,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 23:57:04,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-14 23:57:04,297 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 22 [2020-10-14 23:57:04,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:04,298 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-14 23:57:04,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:57:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-14 23:57:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:57:04,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:04,298 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:04,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 23:57:04,299 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:04,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:04,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1731366135, now seen corresponding path program 10 times [2020-10-14 23:57:04,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:04,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043201603] [2020-10-14 23:57:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:04,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:04,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:04,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:57:04,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:04,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-14 23:57:04,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:04,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:04,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:57:04,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:04,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:57:04,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:04,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:04,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:04,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:04,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:04,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:04,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:04,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:04,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:04,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:04,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:04,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:04,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:04,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043201603] [2020-10-14 23:57:04,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:04,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:57:04,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013079540] [2020-10-14 23:57:04,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:57:04,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:04,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:57:04,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:57:04,730 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 14 states. [2020-10-14 23:57:04,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:04,941 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2020-10-14 23:57:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:57:04,942 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-14 23:57:04,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:04,942 INFO L225 Difference]: With dead ends: 68 [2020-10-14 23:57:04,942 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 23:57:04,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:57:04,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 23:57:04,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2020-10-14 23:57:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 23:57:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-14 23:57:04,955 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 22 [2020-10-14 23:57:04,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:04,955 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-14 23:57:04,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:57:04,956 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-14 23:57:04,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:57:04,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:04,956 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:04,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 23:57:04,957 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:04,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:04,957 INFO L82 PathProgramCache]: Analyzing trace with hash 874056070, now seen corresponding path program 30 times [2020-10-14 23:57:04,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:04,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338409346] [2020-10-14 23:57:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:04,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:05,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:05,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:57:05,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:05,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-14 23:57:05,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:05,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:05,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:57:05,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:05,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:57:05,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:05,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:05,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:05,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:05,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:05,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:05,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:05,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:05,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:05,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:05,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:05,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:05,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:05,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338409346] [2020-10-14 23:57:05,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:05,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:57:05,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782883691] [2020-10-14 23:57:05,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:57:05,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:05,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:57:05,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:57:05,381 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 14 states. [2020-10-14 23:57:05,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:05,599 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2020-10-14 23:57:05,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:57:05,600 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-14 23:57:05,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:05,600 INFO L225 Difference]: With dead ends: 47 [2020-10-14 23:57:05,600 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 23:57:05,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:57:05,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 23:57:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-14 23:57:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 23:57:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-14 23:57:05,609 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2020-10-14 23:57:05,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:05,609 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-14 23:57:05,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:57:05,610 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-14 23:57:05,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:57:05,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:05,610 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:05,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 23:57:05,610 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:05,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1494553211, now seen corresponding path program 31 times [2020-10-14 23:57:05,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:05,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816340030] [2020-10-14 23:57:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:05,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:05,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:05,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:57:05,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:05,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-14 23:57:05,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:05,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:05,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:57:05,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:05,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:57:05,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:06,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:06,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:06,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:06,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:06,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:06,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:06,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:06,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:06,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:06,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:06,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:06,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:06,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816340030] [2020-10-14 23:57:06,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:06,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:57:06,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902128236] [2020-10-14 23:57:06,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:57:06,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:06,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:57:06,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:57:06,089 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 15 states. [2020-10-14 23:57:06,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:06,330 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-14 23:57:06,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:57:06,333 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-14 23:57:06,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:06,333 INFO L225 Difference]: With dead ends: 46 [2020-10-14 23:57:06,333 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 23:57:06,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:57:06,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 23:57:06,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2020-10-14 23:57:06,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 23:57:06,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-14 23:57:06,351 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2020-10-14 23:57:06,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:06,353 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-14 23:57:06,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:57:06,353 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-14 23:57:06,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:57:06,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:06,354 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:06,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 23:57:06,354 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:06,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:06,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1570959962, now seen corresponding path program 32 times [2020-10-14 23:57:06,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:06,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161749678] [2020-10-14 23:57:06,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:06,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:06,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:06,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:57:06,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:06,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-14 23:57:06,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:06,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:06,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:57:06,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:06,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:57:06,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:06,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:06,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:06,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:06,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:06,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:06,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:06,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:06,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:06,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:06,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:06,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:06,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:06,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161749678] [2020-10-14 23:57:06,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:06,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:57:06,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275743041] [2020-10-14 23:57:06,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:57:06,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:06,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:57:06,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:57:06,808 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 15 states. [2020-10-14 23:57:07,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:07,140 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-14 23:57:07,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:57:07,141 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-14 23:57:07,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:07,142 INFO L225 Difference]: With dead ends: 52 [2020-10-14 23:57:07,142 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 23:57:07,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:57:07,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 23:57:07,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2020-10-14 23:57:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 23:57:07,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-14 23:57:07,153 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2020-10-14 23:57:07,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:07,154 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-14 23:57:07,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:57:07,154 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-14 23:57:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:57:07,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:07,154 INFO L422 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:07,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 23:57:07,155 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:07,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:07,156 INFO L82 PathProgramCache]: Analyzing trace with hash -603593371, now seen corresponding path program 33 times [2020-10-14 23:57:07,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:07,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311782130] [2020-10-14 23:57:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:07,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:07,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:07,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:57:07,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:07,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-14 23:57:07,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:07,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:07,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:57:07,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:07,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:57:07,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:07,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:07,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:07,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:07,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:07,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:07,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:07,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:07,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:07,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:07,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:07,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:07,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:07,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311782130] [2020-10-14 23:57:07,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:07,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:57:07,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993459687] [2020-10-14 23:57:07,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:57:07,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:07,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:57:07,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:57:07,592 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 15 states. [2020-10-14 23:57:07,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:07,921 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-10-14 23:57:07,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:57:07,921 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-14 23:57:07,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:07,922 INFO L225 Difference]: With dead ends: 57 [2020-10-14 23:57:07,922 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 23:57:07,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:57:07,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 23:57:07,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2020-10-14 23:57:07,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 23:57:07,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-14 23:57:07,937 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2020-10-14 23:57:07,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:07,937 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-14 23:57:07,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:57:07,937 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-14 23:57:07,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:57:07,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:07,938 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:07,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 23:57:07,938 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:07,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:07,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1542219322, now seen corresponding path program 34 times [2020-10-14 23:57:07,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:07,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947817604] [2020-10-14 23:57:07,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:07,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:08,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:08,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:57:08,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:08,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-14 23:57:08,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:08,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:08,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:57:08,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:08,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:57:08,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:08,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:08,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:08,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:08,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:08,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:08,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:08,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:08,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:08,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:08,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:08,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:08,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:08,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947817604] [2020-10-14 23:57:08,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:08,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:57:08,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765622298] [2020-10-14 23:57:08,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:57:08,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:08,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:57:08,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:57:08,344 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 15 states. [2020-10-14 23:57:08,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:08,615 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-14 23:57:08,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:57:08,616 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-14 23:57:08,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:08,616 INFO L225 Difference]: With dead ends: 61 [2020-10-14 23:57:08,616 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 23:57:08,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:57:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 23:57:08,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2020-10-14 23:57:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 23:57:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-14 23:57:08,626 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2020-10-14 23:57:08,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:08,627 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-14 23:57:08,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:57:08,627 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-14 23:57:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:57:08,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:08,627 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:08,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 23:57:08,628 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:08,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:08,628 INFO L82 PathProgramCache]: Analyzing trace with hash -2126686907, now seen corresponding path program 35 times [2020-10-14 23:57:08,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:08,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253706748] [2020-10-14 23:57:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:08,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:08,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:08,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:57:08,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:08,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-14 23:57:08,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:08,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:08,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:57:08,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:08,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:57:08,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:09,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:09,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:09,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:09,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:09,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:09,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:09,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:09,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:09,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:09,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:09,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:09,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:09,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253706748] [2020-10-14 23:57:09,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:09,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:57:09,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652254107] [2020-10-14 23:57:09,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:57:09,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:09,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:57:09,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:57:09,061 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 15 states. [2020-10-14 23:57:09,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:09,301 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2020-10-14 23:57:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:57:09,301 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-14 23:57:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:09,302 INFO L225 Difference]: With dead ends: 64 [2020-10-14 23:57:09,302 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 23:57:09,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:57:09,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 23:57:09,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2020-10-14 23:57:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 23:57:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-14 23:57:09,312 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2020-10-14 23:57:09,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:09,312 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-14 23:57:09,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:57:09,313 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-14 23:57:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:57:09,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:09,313 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:09,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 23:57:09,314 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:09,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:09,314 INFO L82 PathProgramCache]: Analyzing trace with hash 71216614, now seen corresponding path program 11 times [2020-10-14 23:57:09,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:09,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533732742] [2020-10-14 23:57:09,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:09,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:09,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:09,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:57:09,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:09,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-14 23:57:09,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:09,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:09,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:57:09,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:09,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:57:09,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:09,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:09,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:09,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:09,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:09,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:09,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:57:09,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:09,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:09,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:09,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:09,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:09,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:09,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533732742] [2020-10-14 23:57:09,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:09,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:57:09,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88678940] [2020-10-14 23:57:09,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:57:09,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:09,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:57:09,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:57:09,809 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 15 states. [2020-10-14 23:57:10,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:10,043 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-10-14 23:57:10,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:57:10,044 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-14 23:57:10,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:10,045 INFO L225 Difference]: With dead ends: 69 [2020-10-14 23:57:10,045 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 23:57:10,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:57:10,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 23:57:10,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 37. [2020-10-14 23:57:10,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 23:57:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-14 23:57:10,067 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 23 [2020-10-14 23:57:10,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:10,067 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-14 23:57:10,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:57:10,067 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-14 23:57:10,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:57:10,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:10,068 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:10,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 23:57:10,069 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:10,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:10,069 INFO L82 PathProgramCache]: Analyzing trace with hash 949028471, now seen corresponding path program 36 times [2020-10-14 23:57:10,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:10,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799242660] [2020-10-14 23:57:10,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:10,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:10,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:10,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:57:10,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:10,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-14 23:57:10,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:10,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:10,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:57:10,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:10,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:57:10,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:13,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:13,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:13,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:13,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:13,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:13,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:13,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:13,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:13,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:13,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:13,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:13,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:13,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799242660] [2020-10-14 23:57:13,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:13,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:57:13,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371243540] [2020-10-14 23:57:13,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:57:13,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:13,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:57:13,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=235, Unknown=1, NotChecked=0, Total=272 [2020-10-14 23:57:13,319 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 17 states. [2020-10-14 23:57:13,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:13,805 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-10-14 23:57:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:57:13,805 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-10-14 23:57:13,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:13,806 INFO L225 Difference]: With dead ends: 48 [2020-10-14 23:57:13,806 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 23:57:13,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=40, Invalid=265, Unknown=1, NotChecked=0, Total=306 [2020-10-14 23:57:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 23:57:13,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-10-14 23:57:13,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 23:57:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-14 23:57:13,829 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 24 [2020-10-14 23:57:13,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:13,829 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-14 23:57:13,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:57:13,830 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-14 23:57:13,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:57:13,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:13,830 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:13,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 23:57:13,830 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:13,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:13,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1419580810, now seen corresponding path program 37 times [2020-10-14 23:57:13,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:13,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138495267] [2020-10-14 23:57:13,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:13,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:14,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:14,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:57:14,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:14,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-14 23:57:14,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:14,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:14,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:57:14,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:14,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:57:14,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:14,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:14,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:14,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:14,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:14,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:14,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:14,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:14,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:14,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:14,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:14,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:14,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:14,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138495267] [2020-10-14 23:57:14,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:14,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:57:14,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391645480] [2020-10-14 23:57:14,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:57:14,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:14,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:57:14,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:57:14,386 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 16 states. [2020-10-14 23:57:14,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:14,811 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-10-14 23:57:14,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:57:14,812 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-14 23:57:14,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:14,813 INFO L225 Difference]: With dead ends: 57 [2020-10-14 23:57:14,813 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 23:57:14,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:57:14,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 23:57:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2020-10-14 23:57:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 23:57:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-14 23:57:14,827 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 24 [2020-10-14 23:57:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:14,827 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-14 23:57:14,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:57:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-14 23:57:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:57:14,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:14,828 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:14,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 23:57:14,828 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:14,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:14,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1495987561, now seen corresponding path program 38 times [2020-10-14 23:57:14,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:14,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090937221] [2020-10-14 23:57:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:14,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:15,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:15,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:57:15,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:15,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-14 23:57:15,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:15,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:15,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:57:15,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:15,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:57:15,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:15,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:15,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:15,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:15,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:15,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:15,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:15,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:15,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:15,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:15,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:15,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:15,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:15,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090937221] [2020-10-14 23:57:15,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:15,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:57:15,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569463414] [2020-10-14 23:57:15,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:57:15,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:15,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:57:15,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:57:15,298 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 16 states. [2020-10-14 23:57:15,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:15,808 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2020-10-14 23:57:15,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:57:15,809 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-14 23:57:15,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:15,810 INFO L225 Difference]: With dead ends: 63 [2020-10-14 23:57:15,810 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 23:57:15,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:57:15,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 23:57:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 38. [2020-10-14 23:57:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 23:57:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-14 23:57:15,824 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 24 [2020-10-14 23:57:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:15,824 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-14 23:57:15,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:57:15,824 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-14 23:57:15,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:57:15,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:15,825 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:15,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 23:57:15,825 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:15,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:15,825 INFO L82 PathProgramCache]: Analyzing trace with hash -528620970, now seen corresponding path program 39 times [2020-10-14 23:57:15,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:15,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260392187] [2020-10-14 23:57:15,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:15,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:16,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:16,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:57:16,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:16,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-14 23:57:16,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:16,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:57:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:57:16,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:16,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:16,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:16,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:16,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:16,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:16,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:16,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:16,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:16,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:16,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:16,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:16,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:16,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260392187] [2020-10-14 23:57:16,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:16,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:57:16,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148415122] [2020-10-14 23:57:16,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:57:16,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:16,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:57:16,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:57:16,307 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 16 states. [2020-10-14 23:57:16,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:16,770 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2020-10-14 23:57:16,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:57:16,774 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-14 23:57:16,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:16,775 INFO L225 Difference]: With dead ends: 68 [2020-10-14 23:57:16,775 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 23:57:16,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:57:16,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 23:57:16,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2020-10-14 23:57:16,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 23:57:16,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-14 23:57:16,793 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 24 [2020-10-14 23:57:16,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:16,793 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-14 23:57:16,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:57:16,793 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-14 23:57:16,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:57:16,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:16,794 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:16,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 23:57:16,794 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:16,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:16,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1467246921, now seen corresponding path program 40 times [2020-10-14 23:57:16,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:16,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287776987] [2020-10-14 23:57:16,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:16,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:17,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:17,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:57:17,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:17,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-14 23:57:17,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:17,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:17,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:57:17,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:17,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:57:17,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:17,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:17,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:17,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:17,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:17,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:17,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:17,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:17,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:17,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:17,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:17,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:17,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:17,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287776987] [2020-10-14 23:57:17,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:17,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:57:17,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134197712] [2020-10-14 23:57:17,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:57:17,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:17,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:57:17,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:57:17,278 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 16 states. [2020-10-14 23:57:17,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:17,644 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-10-14 23:57:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:57:17,650 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-14 23:57:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:17,651 INFO L225 Difference]: With dead ends: 72 [2020-10-14 23:57:17,651 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 23:57:17,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:57:17,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 23:57:17,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 38. [2020-10-14 23:57:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 23:57:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-14 23:57:17,665 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 24 [2020-10-14 23:57:17,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:17,665 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-14 23:57:17,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:57:17,665 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-14 23:57:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:57:17,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:17,665 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:17,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 23:57:17,666 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:17,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:17,666 INFO L82 PathProgramCache]: Analyzing trace with hash -2051714506, now seen corresponding path program 41 times [2020-10-14 23:57:17,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:17,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586136332] [2020-10-14 23:57:17,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:17,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:17,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:17,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:57:17,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:17,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-14 23:57:17,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:17,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:17,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:57:17,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:17,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:57:17,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:18,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:18,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:18,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:18,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:18,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:18,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:18,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:18,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:18,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:18,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:18,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:18,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:18,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586136332] [2020-10-14 23:57:18,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:18,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:57:18,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808758026] [2020-10-14 23:57:18,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:57:18,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:18,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:57:18,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:57:18,214 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 16 states. [2020-10-14 23:57:18,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:18,543 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2020-10-14 23:57:18,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:57:18,544 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-14 23:57:18,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:18,545 INFO L225 Difference]: With dead ends: 75 [2020-10-14 23:57:18,545 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 23:57:18,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:57:18,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 23:57:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2020-10-14 23:57:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 23:57:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-14 23:57:18,560 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 24 [2020-10-14 23:57:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:18,560 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-14 23:57:18,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:57:18,560 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-14 23:57:18,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:57:18,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:18,561 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:18,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 23:57:18,561 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:18,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:18,561 INFO L82 PathProgramCache]: Analyzing trace with hash 146189015, now seen corresponding path program 12 times [2020-10-14 23:57:18,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:18,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991402437] [2020-10-14 23:57:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:18,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:18,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:18,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:57:18,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:18,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-14 23:57:18,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:18,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:18,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:57:18,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:18,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:57:18,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:19,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:19,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:19,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:19,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:19,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:19,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:19,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:19,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:19,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:19,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:19,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:19,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:19,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991402437] [2020-10-14 23:57:19,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:19,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:57:19,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884040250] [2020-10-14 23:57:19,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:57:19,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:19,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:57:19,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:57:19,020 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 16 states. [2020-10-14 23:57:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:19,323 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2020-10-14 23:57:19,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:57:19,324 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-14 23:57:19,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:19,325 INFO L225 Difference]: With dead ends: 80 [2020-10-14 23:57:19,325 INFO L226 Difference]: Without dead ends: 75 [2020-10-14 23:57:19,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:57:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-14 23:57:19,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 40. [2020-10-14 23:57:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 23:57:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-14 23:57:19,339 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 24 [2020-10-14 23:57:19,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:19,339 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-14 23:57:19,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:57:19,344 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-14 23:57:19,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:57:19,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:19,344 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:19,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 23:57:19,345 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:19,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:19,346 INFO L82 PathProgramCache]: Analyzing trace with hash -609350715, now seen corresponding path program 42 times [2020-10-14 23:57:19,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:19,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496493734] [2020-10-14 23:57:19,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:19,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:19,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:19,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:57:19,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:19,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-14 23:57:19,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:19,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:19,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:57:19,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:19,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:57:19,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:19,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:19,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:19,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:19,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:19,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:19,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:19,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:19,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:19,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:19,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:19,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:19,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:19,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496493734] [2020-10-14 23:57:19,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:19,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:57:19,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584834577] [2020-10-14 23:57:19,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:57:19,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:19,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:57:19,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:57:19,812 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 16 states. [2020-10-14 23:57:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:20,117 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-14 23:57:20,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:57:20,118 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-14 23:57:20,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:20,119 INFO L225 Difference]: With dead ends: 52 [2020-10-14 23:57:20,119 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 23:57:20,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:57:20,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 23:57:20,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-14 23:57:20,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 23:57:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-14 23:57:20,134 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 25 [2020-10-14 23:57:20,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:20,134 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-14 23:57:20,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:57:20,134 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-14 23:57:20,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:57:20,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:20,135 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:20,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 23:57:20,135 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:20,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:20,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1021794394, now seen corresponding path program 43 times [2020-10-14 23:57:20,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:20,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365663849] [2020-10-14 23:57:20,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:20,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:20,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:20,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:57:20,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:20,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-14 23:57:20,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:20,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:20,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:57:20,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:20,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:57:20,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:20,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:20,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:20,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:20,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:20,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:20,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:20,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:20,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:20,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:20,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:20,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:20,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:20,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365663849] [2020-10-14 23:57:20,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:20,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:57:20,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138083552] [2020-10-14 23:57:20,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:57:20,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:20,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:57:20,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:57:20,779 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 17 states. [2020-10-14 23:57:21,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:21,126 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-10-14 23:57:21,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:57:21,127 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-14 23:57:21,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:21,128 INFO L225 Difference]: With dead ends: 51 [2020-10-14 23:57:21,128 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 23:57:21,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:57:21,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 23:57:21,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-10-14 23:57:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 23:57:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-14 23:57:21,152 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 25 [2020-10-14 23:57:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:21,153 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-14 23:57:21,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:57:21,154 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-14 23:57:21,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:57:21,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:21,154 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:21,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 23:57:21,157 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:21,157 INFO L82 PathProgramCache]: Analyzing trace with hash 904563621, now seen corresponding path program 44 times [2020-10-14 23:57:21,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:21,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136751103] [2020-10-14 23:57:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:21,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:21,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:21,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:57:21,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:21,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-14 23:57:21,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:21,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:21,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:57:21,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:21,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:57:21,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:21,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:21,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:21,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:21,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:21,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:21,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:21,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:21,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:21,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:21,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:21,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:21,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136751103] [2020-10-14 23:57:21,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:21,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:57:21,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077281125] [2020-10-14 23:57:21,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:57:21,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:21,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:57:21,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:57:21,812 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 17 states. [2020-10-14 23:57:22,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:22,377 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-10-14 23:57:22,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:57:22,377 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-14 23:57:22,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:22,378 INFO L225 Difference]: With dead ends: 58 [2020-10-14 23:57:22,379 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 23:57:22,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:57:22,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 23:57:22,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2020-10-14 23:57:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 23:57:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-14 23:57:22,410 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 25 [2020-10-14 23:57:22,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:22,410 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-14 23:57:22,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:57:22,411 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-14 23:57:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:57:22,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:22,411 INFO L422 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:22,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 23:57:22,412 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:22,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:22,412 INFO L82 PathProgramCache]: Analyzing trace with hash 828156870, now seen corresponding path program 45 times [2020-10-14 23:57:22,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:22,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784823105] [2020-10-14 23:57:22,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:22,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:22,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:22,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:57:22,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:22,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-14 23:57:22,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:22,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:22,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:57:22,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:22,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:57:22,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:57:23,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:23,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:23,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:23,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:23,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:23,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:23,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:23,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:23,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:23,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:23,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:23,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:23,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784823105] [2020-10-14 23:57:23,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:23,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:57:23,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778562624] [2020-10-14 23:57:23,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:57:23,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:23,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:57:23,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:57:23,252 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 17 states. [2020-10-14 23:57:23,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:23,761 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-14 23:57:23,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:57:23,763 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-14 23:57:23,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:23,764 INFO L225 Difference]: With dead ends: 64 [2020-10-14 23:57:23,764 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 23:57:23,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:57:23,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 23:57:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2020-10-14 23:57:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 23:57:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-14 23:57:23,777 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 25 [2020-10-14 23:57:23,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:23,777 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-14 23:57:23,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:57:23,777 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-14 23:57:23,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:57:23,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:23,778 INFO L422 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:23,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 23:57:23,778 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:23,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:23,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1795523461, now seen corresponding path program 46 times [2020-10-14 23:57:23,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:23,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396418138] [2020-10-14 23:57:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:23,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:24,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:24,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:57:24,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:24,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-14 23:57:24,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:24,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:24,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:57:24,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:24,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:57:24,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:24,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:24,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:24,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:24,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:24,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:24,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:24,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:24,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:24,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:24,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:24,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:24,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:24,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396418138] [2020-10-14 23:57:24,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:24,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:57:24,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974083348] [2020-10-14 23:57:24,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:57:24,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:24,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:57:24,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:57:24,329 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 17 states. [2020-10-14 23:57:24,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:24,820 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2020-10-14 23:57:24,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:57:24,820 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-14 23:57:24,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:24,821 INFO L225 Difference]: With dead ends: 69 [2020-10-14 23:57:24,822 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 23:57:24,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:57:24,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 23:57:24,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 39. [2020-10-14 23:57:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 23:57:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-14 23:57:24,844 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 25 [2020-10-14 23:57:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:24,845 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-14 23:57:24,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:57:24,845 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-14 23:57:24,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:57:24,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:24,846 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:24,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 23:57:24,846 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:24,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:24,847 INFO L82 PathProgramCache]: Analyzing trace with hash 856897510, now seen corresponding path program 47 times [2020-10-14 23:57:24,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:24,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537738960] [2020-10-14 23:57:24,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:24,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:25,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:25,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:57:25,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:25,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-14 23:57:25,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:25,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:25,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:57:25,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:25,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:57:25,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:25,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:25,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:25,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:25,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:25,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:25,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:25,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:25,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:25,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:25,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:25,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:25,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:25,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537738960] [2020-10-14 23:57:25,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:25,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:57:25,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101483540] [2020-10-14 23:57:25,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:57:25,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:25,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:57:25,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:57:25,454 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 17 states. [2020-10-14 23:57:25,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:25,860 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-10-14 23:57:25,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:57:25,861 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-14 23:57:25,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:25,862 INFO L225 Difference]: With dead ends: 73 [2020-10-14 23:57:25,862 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 23:57:25,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:57:25,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 23:57:25,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2020-10-14 23:57:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 23:57:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-14 23:57:25,878 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 25 [2020-10-14 23:57:25,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:25,879 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-14 23:57:25,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:57:25,879 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-14 23:57:25,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:57:25,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:25,879 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:25,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 23:57:25,880 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:25,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:25,880 INFO L82 PathProgramCache]: Analyzing trace with hash 272429925, now seen corresponding path program 48 times [2020-10-14 23:57:25,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:25,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055712964] [2020-10-14 23:57:25,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:25,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:26,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:26,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:57:26,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:26,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-14 23:57:26,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:26,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:26,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:57:26,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:26,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:57:26,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:26,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:26,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:26,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:26,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:26,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:26,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:26,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:26,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:26,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:26,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:26,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:26,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:26,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055712964] [2020-10-14 23:57:26,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:26,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:57:26,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410719664] [2020-10-14 23:57:26,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:57:26,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:26,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:57:26,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:57:26,431 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 17 states. [2020-10-14 23:57:26,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:26,793 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-10-14 23:57:26,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:57:26,793 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-14 23:57:26,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:26,794 INFO L225 Difference]: With dead ends: 76 [2020-10-14 23:57:26,794 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 23:57:26,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:57:26,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 23:57:26,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 39. [2020-10-14 23:57:26,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 23:57:26,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-14 23:57:26,809 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 25 [2020-10-14 23:57:26,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:26,809 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-14 23:57:26,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:57:26,810 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-14 23:57:26,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:57:26,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:26,810 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:26,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 23:57:26,810 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:26,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:26,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1824633850, now seen corresponding path program 13 times [2020-10-14 23:57:26,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:26,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265718111] [2020-10-14 23:57:26,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:26,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:27,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:27,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:57:27,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:27,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-14 23:57:27,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:27,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:27,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:57:27,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:27,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:57:27,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:27,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:27,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:27,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:27,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:27,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:27,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:27,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:27,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:27,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:27,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:27,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:27,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:27,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265718111] [2020-10-14 23:57:27,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:27,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:57:27,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696002370] [2020-10-14 23:57:27,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:57:27,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:27,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:57:27,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:57:27,264 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 17 states. [2020-10-14 23:57:27,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:27,580 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-10-14 23:57:27,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:57:27,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-14 23:57:27,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:27,583 INFO L225 Difference]: With dead ends: 81 [2020-10-14 23:57:27,583 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 23:57:27,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:57:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 23:57:27,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 41. [2020-10-14 23:57:27,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:57:27,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-10-14 23:57:27,611 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 25 [2020-10-14 23:57:27,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:27,611 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-10-14 23:57:27,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:57:27,611 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-10-14 23:57:27,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:57:27,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:27,613 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:27,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 23:57:27,613 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:27,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:27,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1575317386, now seen corresponding path program 49 times [2020-10-14 23:57:27,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:27,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880254080] [2020-10-14 23:57:27,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:27,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:27,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:27,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:57:27,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:27,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-14 23:57:27,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:27,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:27,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:57:27,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:27,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:57:27,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:28,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:28,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:28,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:28,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:28,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:28,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:28,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:28,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:28,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:28,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:28,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:28,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:28,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880254080] [2020-10-14 23:57:28,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:28,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:57:28,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728809061] [2020-10-14 23:57:28,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:57:28,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:28,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:57:28,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:57:28,048 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 12 states. [2020-10-14 23:57:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:28,229 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-14 23:57:28,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:57:28,236 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-14 23:57:28,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:28,236 INFO L225 Difference]: With dead ends: 53 [2020-10-14 23:57:28,236 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 23:57:28,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:57:28,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 23:57:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-14 23:57:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 23:57:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-14 23:57:28,251 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 26 [2020-10-14 23:57:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:28,251 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-14 23:57:28,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:57:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-14 23:57:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:57:28,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:28,252 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:28,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-14 23:57:28,253 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:28,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:28,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1987761065, now seen corresponding path program 50 times [2020-10-14 23:57:28,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:28,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19835618] [2020-10-14 23:57:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:28,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:28,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:28,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:57:28,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:28,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-14 23:57:28,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:28,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:28,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:57:28,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:28,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:57:28,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:28,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:28,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:28,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:28,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:28,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:28,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:28,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:28,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:28,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:28,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:28,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:28,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:28,823 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:28,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19835618] [2020-10-14 23:57:28,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:28,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:57:28,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587688626] [2020-10-14 23:57:28,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:57:28,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:28,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:57:28,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:57:28,825 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 18 states. [2020-10-14 23:57:29,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:29,371 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2020-10-14 23:57:29,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:57:29,372 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-14 23:57:29,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:29,373 INFO L225 Difference]: With dead ends: 63 [2020-10-14 23:57:29,373 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 23:57:29,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:57:29,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 23:57:29,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2020-10-14 23:57:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 23:57:29,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-14 23:57:29,395 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 26 [2020-10-14 23:57:29,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:29,395 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-14 23:57:29,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:57:29,396 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-14 23:57:29,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:57:29,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:29,396 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:29,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-14 23:57:29,397 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:29,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:29,397 INFO L82 PathProgramCache]: Analyzing trace with hash -61403050, now seen corresponding path program 51 times [2020-10-14 23:57:29,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:29,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853398447] [2020-10-14 23:57:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:29,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:29,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:29,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:57:29,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:29,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-14 23:57:29,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:29,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:29,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:57:29,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:29,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:57:29,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:29,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:29,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:29,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:29,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:29,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:29,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:29,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:29,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:29,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:29,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:29,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:29,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:29,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853398447] [2020-10-14 23:57:29,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:29,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:57:29,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917971397] [2020-10-14 23:57:29,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:57:29,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:29,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:57:29,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:57:29,980 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 18 states. [2020-10-14 23:57:30,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:30,605 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-14 23:57:30,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:57:30,605 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-14 23:57:30,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:30,606 INFO L225 Difference]: With dead ends: 70 [2020-10-14 23:57:30,606 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 23:57:30,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:57:30,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 23:57:30,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 42. [2020-10-14 23:57:30,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 23:57:30,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-14 23:57:30,623 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 26 [2020-10-14 23:57:30,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:30,623 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-14 23:57:30,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:57:30,624 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-14 23:57:30,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:57:30,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:30,624 INFO L422 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:30,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-14 23:57:30,624 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:30,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:30,625 INFO L82 PathProgramCache]: Analyzing trace with hash -137809801, now seen corresponding path program 52 times [2020-10-14 23:57:30,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:30,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127352362] [2020-10-14 23:57:30,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:30,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:31,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:31,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:57:31,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:31,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-14 23:57:31,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:31,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:31,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:57:31,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:31,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:57:31,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:31,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:31,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:31,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:31,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:31,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:31,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:31,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:31,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:31,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:31,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:31,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:31,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:31,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127352362] [2020-10-14 23:57:31,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:31,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:57:31,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276373247] [2020-10-14 23:57:31,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:57:31,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:31,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:57:31,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:57:31,285 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 18 states. [2020-10-14 23:57:31,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:31,908 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-14 23:57:31,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:57:31,909 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-14 23:57:31,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:31,910 INFO L225 Difference]: With dead ends: 76 [2020-10-14 23:57:31,910 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 23:57:31,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:57:31,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 23:57:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 42. [2020-10-14 23:57:31,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 23:57:31,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-14 23:57:31,931 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 26 [2020-10-14 23:57:31,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:31,932 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-14 23:57:31,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:57:31,932 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-14 23:57:31,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:57:31,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:31,932 INFO L422 BasicCegarLoop]: trace histogram [11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:31,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-14 23:57:31,933 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:31,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:31,933 INFO L82 PathProgramCache]: Analyzing trace with hash 829556790, now seen corresponding path program 53 times [2020-10-14 23:57:31,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:31,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456549130] [2020-10-14 23:57:31,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:31,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:32,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:32,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:57:32,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:32,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-14 23:57:32,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:32,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:32,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:57:32,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:32,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:57:32,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:32,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:32,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:32,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:32,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:32,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:32,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:32,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:32,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:32,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:32,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456549130] [2020-10-14 23:57:32,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:32,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:57:32,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335074824] [2020-10-14 23:57:32,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:57:32,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:32,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:57:32,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:57:32,519 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 18 states. [2020-10-14 23:57:33,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:33,041 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-10-14 23:57:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:57:33,045 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-14 23:57:33,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:33,045 INFO L225 Difference]: With dead ends: 81 [2020-10-14 23:57:33,045 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 23:57:33,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:57:33,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 23:57:33,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 42. [2020-10-14 23:57:33,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 23:57:33,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-14 23:57:33,063 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 26 [2020-10-14 23:57:33,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:33,063 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-14 23:57:33,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:57:33,063 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-14 23:57:33,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:57:33,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:33,064 INFO L422 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:33,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-14 23:57:33,064 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:33,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:33,065 INFO L82 PathProgramCache]: Analyzing trace with hash -109069161, now seen corresponding path program 54 times [2020-10-14 23:57:33,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:33,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98131099] [2020-10-14 23:57:33,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:33,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:33,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:33,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:57:33,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:33,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-14 23:57:33,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:33,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:33,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:57:33,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:33,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:57:33,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:33,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:33,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:33,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:33,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:33,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:33,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:33,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:33,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:33,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:33,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:33,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:33,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:57:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:33,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98131099] [2020-10-14 23:57:33,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:33,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:57:33,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935122240] [2020-10-14 23:57:33,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:57:33,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:33,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:57:33,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:57:33,630 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 18 states. [2020-10-14 23:57:34,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:34,288 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2020-10-14 23:57:34,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:57:34,292 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-14 23:57:34,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:34,292 INFO L225 Difference]: With dead ends: 85 [2020-10-14 23:57:34,293 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 23:57:34,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:57:34,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 23:57:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 42. [2020-10-14 23:57:34,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 23:57:34,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-14 23:57:34,331 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 26 [2020-10-14 23:57:34,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:34,331 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-14 23:57:34,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:57:34,332 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-14 23:57:34,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:57:34,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:34,334 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:34,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-14 23:57:34,334 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:34,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:34,334 INFO L82 PathProgramCache]: Analyzing trace with hash -693536746, now seen corresponding path program 55 times [2020-10-14 23:57:34,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:34,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475301227] [2020-10-14 23:57:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:34,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:34,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:34,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:57:34,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:34,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-14 23:57:34,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:34,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:34,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:57:34,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:34,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:57:34,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:34,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:34,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:34,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:34,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:34,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:34,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:34,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:34,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:34,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:34,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:34,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:34,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:34,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475301227] [2020-10-14 23:57:34,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:34,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:57:34,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226971346] [2020-10-14 23:57:34,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:57:34,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:34,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:57:34,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:57:34,920 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 18 states. [2020-10-14 23:57:35,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:35,324 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2020-10-14 23:57:35,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:57:35,326 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-14 23:57:35,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:35,327 INFO L225 Difference]: With dead ends: 88 [2020-10-14 23:57:35,327 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 23:57:35,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:57:35,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 23:57:35,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 42. [2020-10-14 23:57:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 23:57:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-14 23:57:35,348 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 26 [2020-10-14 23:57:35,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:35,348 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-14 23:57:35,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:57:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-14 23:57:35,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:57:35,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:35,349 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:35,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-14 23:57:35,349 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:35,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:35,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1504366775, now seen corresponding path program 14 times [2020-10-14 23:57:35,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:35,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019905689] [2020-10-14 23:57:35,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:35,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:35,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:35,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:57:35,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:35,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-14 23:57:35,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:35,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:35,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:57:35,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:35,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:57:35,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:36,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:36,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:36,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:36,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:36,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:36,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:36,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:36,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:36,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:36,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:36,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:36,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:36,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019905689] [2020-10-14 23:57:36,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:36,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:57:36,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957877571] [2020-10-14 23:57:36,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:57:36,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:36,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:57:36,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:57:36,045 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 18 states. [2020-10-14 23:57:36,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:36,426 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2020-10-14 23:57:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:57:36,427 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-14 23:57:36,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:36,427 INFO L225 Difference]: With dead ends: 93 [2020-10-14 23:57:36,428 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 23:57:36,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:57:36,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 23:57:36,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 44. [2020-10-14 23:57:36,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 23:57:36,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-10-14 23:57:36,446 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 26 [2020-10-14 23:57:36,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:36,446 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-10-14 23:57:36,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:57:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-10-14 23:57:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:57:36,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:36,447 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:36,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-14 23:57:36,447 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:36,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:36,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1554660954, now seen corresponding path program 56 times [2020-10-14 23:57:36,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:36,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128947583] [2020-10-14 23:57:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:36,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:36,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:36,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:57:36,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:36,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-14 23:57:36,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:36,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:57:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:57:36,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:37,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:37,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:37,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:37,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:37,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:37,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 23:57:37,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:37,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:37,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:37,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:37,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:37,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:57:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:37,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128947583] [2020-10-14 23:57:37,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:37,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:57:37,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507282510] [2020-10-14 23:57:37,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:57:37,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:37,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:57:37,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:57:37,081 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 18 states. [2020-10-14 23:57:37,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:37,611 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-10-14 23:57:37,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:57:37,612 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-14 23:57:37,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:37,613 INFO L225 Difference]: With dead ends: 57 [2020-10-14 23:57:37,613 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 23:57:37,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:57:37,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 23:57:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-14 23:57:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 23:57:37,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-14 23:57:37,653 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 27 [2020-10-14 23:57:37,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:37,654 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-14 23:57:37,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:57:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-14 23:57:37,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:57:37,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:37,655 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:37,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-14 23:57:37,656 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:37,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1455513115, now seen corresponding path program 57 times [2020-10-14 23:57:37,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:37,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586137076] [2020-10-14 23:57:37,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:37,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:38,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:38,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:57:38,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:38,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-14 23:57:38,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:38,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:38,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:57:38,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:38,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:57:38,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:38,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:38,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:38,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:38,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:38,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:38,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:38,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:38,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:38,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:38,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:38,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:38,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:38,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586137076] [2020-10-14 23:57:38,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:38,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:57:38,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875509062] [2020-10-14 23:57:38,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:57:38,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:38,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:57:38,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:57:38,709 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 19 states. [2020-10-14 23:57:39,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:39,252 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-14 23:57:39,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:57:39,253 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-14 23:57:39,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:39,253 INFO L225 Difference]: With dead ends: 56 [2020-10-14 23:57:39,254 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 23:57:39,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:57:39,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 23:57:39,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-14 23:57:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:57:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-14 23:57:39,284 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 27 [2020-10-14 23:57:39,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:39,284 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-14 23:57:39,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:57:39,285 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-14 23:57:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:57:39,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:39,285 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:39,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-14 23:57:39,286 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:39,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:39,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1867956794, now seen corresponding path program 58 times [2020-10-14 23:57:39,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:39,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852215407] [2020-10-14 23:57:39,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:39,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:39,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:39,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:57:39,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:39,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-14 23:57:39,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:39,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:39,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:57:39,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:39,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:57:39,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:39,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:39,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:39,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:39,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:39,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:39,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:39,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:39,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:39,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:39,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:39,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:39,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:39,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852215407] [2020-10-14 23:57:39,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:39,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:57:39,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025449170] [2020-10-14 23:57:39,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:57:39,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:39,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:57:39,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:57:39,940 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 19 states. [2020-10-14 23:57:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:40,610 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-14 23:57:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:57:40,610 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-14 23:57:40,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:40,611 INFO L225 Difference]: With dead ends: 64 [2020-10-14 23:57:40,611 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 23:57:40,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:57:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 23:57:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2020-10-14 23:57:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:57:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-14 23:57:40,647 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 27 [2020-10-14 23:57:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:40,648 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-14 23:57:40,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:57:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-14 23:57:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:57:40,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:40,648 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:40,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-14 23:57:40,649 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:40,649 INFO L82 PathProgramCache]: Analyzing trace with hash 58401221, now seen corresponding path program 59 times [2020-10-14 23:57:40,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:40,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248106953] [2020-10-14 23:57:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:40,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:41,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:41,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:57:41,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:41,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-14 23:57:41,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:41,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:41,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:57:41,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:41,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:57:41,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:41,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:41,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:41,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:41,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:41,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:41,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:57:41,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:41,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:41,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:41,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:41,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:41,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:41,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248106953] [2020-10-14 23:57:41,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:41,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:57:41,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260592789] [2020-10-14 23:57:41,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:57:41,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:41,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:57:41,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:57:41,365 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 19 states. [2020-10-14 23:57:42,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:42,051 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-10-14 23:57:42,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:57:42,052 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-14 23:57:42,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:42,053 INFO L225 Difference]: With dead ends: 71 [2020-10-14 23:57:42,053 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 23:57:42,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:57:42,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 23:57:42,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 43. [2020-10-14 23:57:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:57:42,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-14 23:57:42,091 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 27 [2020-10-14 23:57:42,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:42,092 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-14 23:57:42,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:57:42,092 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-14 23:57:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:57:42,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:42,093 INFO L422 BasicCegarLoop]: trace histogram [11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:42,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-14 23:57:42,094 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:42,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:42,094 INFO L82 PathProgramCache]: Analyzing trace with hash -18005530, now seen corresponding path program 60 times [2020-10-14 23:57:42,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:42,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897286200] [2020-10-14 23:57:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:42,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:42,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:42,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:57:42,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:42,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-14 23:57:42,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:42,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:42,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:57:42,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:42,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:57:42,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:42,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:42,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:42,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:42,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:42,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:42,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:42,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:42,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:42,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:42,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:42,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:42,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:42,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897286200] [2020-10-14 23:57:42,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:42,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:57:42,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652739370] [2020-10-14 23:57:42,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:57:42,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:42,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:57:42,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:57:42,652 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 19 states. [2020-10-14 23:57:43,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:43,349 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2020-10-14 23:57:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:57:43,349 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-14 23:57:43,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:43,350 INFO L225 Difference]: With dead ends: 77 [2020-10-14 23:57:43,350 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 23:57:43,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:57:43,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 23:57:43,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 43. [2020-10-14 23:57:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:57:43,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-14 23:57:43,374 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 27 [2020-10-14 23:57:43,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:43,374 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-14 23:57:43,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:57:43,375 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-14 23:57:43,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:57:43,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:43,375 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:43,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-14 23:57:43,375 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:43,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:43,376 INFO L82 PathProgramCache]: Analyzing trace with hash 949361061, now seen corresponding path program 61 times [2020-10-14 23:57:43,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:43,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628065839] [2020-10-14 23:57:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:43,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:43,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:43,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:57:43,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:43,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-14 23:57:43,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:43,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:43,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:57:43,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:43,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:57:43,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:43,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:43,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:43,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:43,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:43,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:43,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:43,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:43,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:43,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:43,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:43,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:43,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:43,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628065839] [2020-10-14 23:57:43,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:43,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:57:43,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39101373] [2020-10-14 23:57:43,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:57:43,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:43,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:57:43,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:57:43,996 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 19 states. [2020-10-14 23:57:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:44,596 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2020-10-14 23:57:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:57:44,600 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-14 23:57:44,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:44,601 INFO L225 Difference]: With dead ends: 82 [2020-10-14 23:57:44,601 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 23:57:44,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:57:44,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 23:57:44,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 43. [2020-10-14 23:57:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:57:44,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-14 23:57:44,623 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 27 [2020-10-14 23:57:44,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:44,623 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-14 23:57:44,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:57:44,623 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-14 23:57:44,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:57:44,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:44,624 INFO L422 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:44,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-14 23:57:44,624 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:44,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:44,625 INFO L82 PathProgramCache]: Analyzing trace with hash 10735110, now seen corresponding path program 62 times [2020-10-14 23:57:44,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:44,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706448759] [2020-10-14 23:57:44,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:44,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:44,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:44,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:44,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:57:44,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:44,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-14 23:57:44,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:44,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:44,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:57:44,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:44,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:57:44,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:45,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:45,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:45,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:45,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:45,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:45,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:45,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:45,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:45,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:45,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:45,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:45,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:45,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706448759] [2020-10-14 23:57:45,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:45,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:57:45,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11888126] [2020-10-14 23:57:45,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:57:45,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:45,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:57:45,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:57:45,263 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 19 states. [2020-10-14 23:57:45,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:45,798 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-10-14 23:57:45,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:57:45,801 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-14 23:57:45,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:45,802 INFO L225 Difference]: With dead ends: 86 [2020-10-14 23:57:45,803 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 23:57:45,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:57:45,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 23:57:45,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2020-10-14 23:57:45,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:57:45,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-14 23:57:45,828 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 27 [2020-10-14 23:57:45,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:45,828 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-14 23:57:45,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:57:45,828 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-14 23:57:45,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:57:45,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:45,829 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:45,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-14 23:57:45,829 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:45,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:45,829 INFO L82 PathProgramCache]: Analyzing trace with hash -573732475, now seen corresponding path program 63 times [2020-10-14 23:57:45,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:45,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419284002] [2020-10-14 23:57:45,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:45,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:46,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:46,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:57:46,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:46,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-14 23:57:46,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:46,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:46,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:57:46,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:46,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:57:46,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:46,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:46,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:46,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:46,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:46,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:46,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:46,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:46,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:46,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:46,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:46,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:46,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419284002] [2020-10-14 23:57:46,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:46,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:57:46,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944890290] [2020-10-14 23:57:46,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:57:46,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:46,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:57:46,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:57:46,426 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 19 states. [2020-10-14 23:57:46,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:46,891 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2020-10-14 23:57:46,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:57:46,892 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-14 23:57:46,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:46,892 INFO L225 Difference]: With dead ends: 89 [2020-10-14 23:57:46,892 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 23:57:46,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:57:46,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 23:57:46,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 43. [2020-10-14 23:57:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:57:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-14 23:57:46,916 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 27 [2020-10-14 23:57:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:46,916 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-14 23:57:46,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:57:46,916 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-14 23:57:46,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:57:46,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:46,917 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:46,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-14 23:57:46,917 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:46,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1624171046, now seen corresponding path program 15 times [2020-10-14 23:57:46,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:46,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333774384] [2020-10-14 23:57:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:46,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:47,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:47,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:57:47,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:47,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 362 [2020-10-14 23:57:47,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:47,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:47,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:57:47,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:47,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:57:47,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:47,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:47,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:47,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:47,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:47,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:47,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:47,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:47,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:47,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:47,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:47,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:47,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:47,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333774384] [2020-10-14 23:57:47,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:47,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:57:47,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15839324] [2020-10-14 23:57:47,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:57:47,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:47,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:57:47,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:57:47,589 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 19 states. [2020-10-14 23:57:48,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:48,013 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-10-14 23:57:48,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:57:48,014 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-14 23:57:48,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:48,015 INFO L225 Difference]: With dead ends: 94 [2020-10-14 23:57:48,015 INFO L226 Difference]: Without dead ends: 89 [2020-10-14 23:57:48,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:57:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-14 23:57:48,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 45. [2020-10-14 23:57:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 23:57:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2020-10-14 23:57:48,037 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 27 [2020-10-14 23:57:48,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:48,038 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2020-10-14 23:57:48,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:57:48,038 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2020-10-14 23:57:48,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:57:48,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:48,038 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:48,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-14 23:57:48,038 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:48,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:48,039 INFO L82 PathProgramCache]: Analyzing trace with hash -2135695849, now seen corresponding path program 64 times [2020-10-14 23:57:48,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:48,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329745388] [2020-10-14 23:57:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:48,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:48,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:48,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:57:48,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:48,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-14 23:57:48,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:48,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:48,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:57:48,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:48,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:57:48,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:48,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:48,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:48,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:48,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:48,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:48,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:48,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:48,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:48,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:48,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329745388] [2020-10-14 23:57:48,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:48,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:57:48,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782908930] [2020-10-14 23:57:48,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:57:48,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:48,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:57:48,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:57:48,705 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 14 states. [2020-10-14 23:57:48,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:48,978 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-10-14 23:57:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:57:48,979 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-14 23:57:48,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:48,980 INFO L225 Difference]: With dead ends: 58 [2020-10-14 23:57:48,980 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 23:57:48,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:57:48,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 23:57:49,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-10-14 23:57:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 23:57:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-14 23:57:49,008 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 28 [2020-10-14 23:57:49,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:49,008 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-14 23:57:49,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:57:49,008 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-14 23:57:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:57:49,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:49,008 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:49,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-14 23:57:49,009 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:49,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:49,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2036548010, now seen corresponding path program 65 times [2020-10-14 23:57:49,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:49,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637120519] [2020-10-14 23:57:49,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:49,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:49,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:49,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:57:49,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:49,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-14 23:57:49,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:49,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:49,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:57:49,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:49,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:57:49,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:49,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:49,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:49,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:49,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:49,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:49,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:49,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:49,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:49,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:49,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:49,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:49,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:49,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637120519] [2020-10-14 23:57:49,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:49,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:57:49,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388734805] [2020-10-14 23:57:49,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:57:49,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:49,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:57:49,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:57:49,674 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 20 states. [2020-10-14 23:57:50,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:50,377 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2020-10-14 23:57:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:57:50,378 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-14 23:57:50,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:50,379 INFO L225 Difference]: With dead ends: 69 [2020-10-14 23:57:50,379 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 23:57:50,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:57:50,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 23:57:50,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2020-10-14 23:57:50,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 23:57:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-14 23:57:50,406 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 28 [2020-10-14 23:57:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:50,406 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-14 23:57:50,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:57:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-14 23:57:50,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:57:50,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:50,407 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:50,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-14 23:57:50,407 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:50,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:50,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1845975607, now seen corresponding path program 66 times [2020-10-14 23:57:50,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:50,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960796807] [2020-10-14 23:57:50,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:50,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:50,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:50,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:57:50,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:50,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-14 23:57:50,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:50,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:57:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:57:50,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:51,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:51,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:51,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:51,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:51,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:51,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:51,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:51,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:51,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:51,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:51,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:51,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:51,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960796807] [2020-10-14 23:57:51,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:51,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:57:51,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706072130] [2020-10-14 23:57:51,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:57:51,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:51,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:57:51,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:57:51,104 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 20 states. [2020-10-14 23:57:51,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:51,967 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2020-10-14 23:57:51,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:57:51,973 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-14 23:57:51,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:51,973 INFO L225 Difference]: With dead ends: 77 [2020-10-14 23:57:51,974 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 23:57:51,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:57:51,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 23:57:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-14 23:57:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 23:57:52,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-14 23:57:52,006 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 28 [2020-10-14 23:57:52,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:52,006 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-14 23:57:52,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:57:52,006 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-14 23:57:52,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:57:52,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:52,006 INFO L422 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:52,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-14 23:57:52,007 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:52,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:52,007 INFO L82 PathProgramCache]: Analyzing trace with hash -522633674, now seen corresponding path program 67 times [2020-10-14 23:57:52,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:52,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508906430] [2020-10-14 23:57:52,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:52,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:52,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:52,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:57:52,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:52,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-14 23:57:52,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:52,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:52,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:57:52,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:52,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:57:52,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:52,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:52,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:52,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:52,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:52,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:52,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:52,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:52,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:52,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:52,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:52,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:52,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:52,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508906430] [2020-10-14 23:57:52,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:52,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:57:52,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225015208] [2020-10-14 23:57:52,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:57:52,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:52,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:57:52,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:57:52,707 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 20 states. [2020-10-14 23:57:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:53,600 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-10-14 23:57:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:57:53,601 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-14 23:57:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:53,602 INFO L225 Difference]: With dead ends: 84 [2020-10-14 23:57:53,602 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 23:57:53,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:57:53,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 23:57:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 46. [2020-10-14 23:57:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 23:57:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-14 23:57:53,631 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 28 [2020-10-14 23:57:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:53,631 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-14 23:57:53,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:57:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-14 23:57:53,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:57:53,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:53,631 INFO L422 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:53,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-10-14 23:57:53,632 INFO L427 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:53,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:53,632 INFO L82 PathProgramCache]: Analyzing trace with hash -599040425, now seen corresponding path program 68 times [2020-10-14 23:57:53,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:53,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767325846] [2020-10-14 23:57:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:53,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:53,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:53,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:57:53,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:53,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-14 23:57:53,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:53,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:53,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:57:53,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:53,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:57:53,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:54,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:54,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:54,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:54,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:54,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:54,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:54,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:54,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:54,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:54,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:54,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:54,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:54,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767325846] [2020-10-14 23:57:54,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:54,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:57:54,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827294741] [2020-10-14 23:57:54,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:57:54,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:54,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:57:54,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:57:54,268 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 20 states. [2020-10-14 23:57:55,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:55,111 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-10-14 23:57:55,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:57:55,114 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-14 23:57:55,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:55,115 INFO L225 Difference]: With dead ends: 90 [2020-10-14 23:57:55,115 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 23:57:55,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:57:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 23:57:55,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 46. [2020-10-14 23:57:55,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 23:57:55,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-14 23:57:55,156 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 28 [2020-10-14 23:57:55,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:55,156 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-14 23:57:55,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:57:55,157 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-14 23:57:55,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:57:55,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:55,157 INFO L422 BasicCegarLoop]: trace histogram [13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:55,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-10-14 23:57:55,158 INFO L427 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:55,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:55,158 INFO L82 PathProgramCache]: Analyzing trace with hash 368326166, now seen corresponding path program 69 times [2020-10-14 23:57:55,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:55,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335856257] [2020-10-14 23:57:55,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:55,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:55,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:57:55,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:55,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-14 23:57:55,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:55,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:55,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:57:55,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:55,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:57:55,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:55,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:55,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:55,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:55,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:55,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:55,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:55,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:55,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:55,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:55,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:55,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:55,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335856257] [2020-10-14 23:57:55,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:55,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:57:55,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038636374] [2020-10-14 23:57:55,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:57:55,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:55,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:57:55,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:57:55,836 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 20 states. [2020-10-14 23:57:56,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:56,520 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2020-10-14 23:57:56,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:57:56,521 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-14 23:57:56,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:56,522 INFO L225 Difference]: With dead ends: 95 [2020-10-14 23:57:56,522 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 23:57:56,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:57:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 23:57:56,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 46. [2020-10-14 23:57:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 23:57:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-14 23:57:56,553 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 28 [2020-10-14 23:57:56,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:56,554 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-14 23:57:56,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:57:56,554 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-14 23:57:56,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:57:56,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:56,554 INFO L422 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:56,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-10-14 23:57:56,555 INFO L427 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:56,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:56,555 INFO L82 PathProgramCache]: Analyzing trace with hash -570299785, now seen corresponding path program 70 times [2020-10-14 23:57:56,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:56,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612616639] [2020-10-14 23:57:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:56,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:56,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:56,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:57:56,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:56,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-14 23:57:56,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:56,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:56,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:57:56,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:56,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:57:56,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:57,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:57,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:57,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:57,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:57,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:57,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:57,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:57,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:57,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:57,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:57,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:57,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612616639] [2020-10-14 23:57:57,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:57,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:57:57,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382883269] [2020-10-14 23:57:57,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:57:57,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:57,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:57:57,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:57:57,269 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 20 states. [2020-10-14 23:57:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:57,896 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-10-14 23:57:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:57:57,897 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-14 23:57:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:57,898 INFO L225 Difference]: With dead ends: 99 [2020-10-14 23:57:57,898 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 23:57:57,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:57:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 23:57:57,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 46. [2020-10-14 23:57:57,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 23:57:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-14 23:57:57,941 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 28 [2020-10-14 23:57:57,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:57,941 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-14 23:57:57,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:57:57,941 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-14 23:57:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:57:57,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:57,942 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:57,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-10-14 23:57:57,942 INFO L427 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:57,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:57,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1154767370, now seen corresponding path program 71 times [2020-10-14 23:57:57,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:57,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996013259] [2020-10-14 23:57:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:57,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:58,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:57:58,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:58,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-10-14 23:57:58,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:58,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:58,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:57:58,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:58,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:57:58,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:58,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:58,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:58,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:58,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:58,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:58,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:58,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:58,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:58,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996013259] [2020-10-14 23:57:58,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:58,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:57:58,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960814298] [2020-10-14 23:57:58,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:57:58,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:58,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:57:58,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:57:58,637 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 20 states. [2020-10-14 23:57:59,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:59,157 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2020-10-14 23:57:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:57:59,157 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-14 23:57:59,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:59,158 INFO L225 Difference]: With dead ends: 102 [2020-10-14 23:57:59,158 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 23:57:59,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:57:59,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 23:57:59,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 46. [2020-10-14 23:57:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 23:57:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-14 23:57:59,187 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 28 [2020-10-14 23:57:59,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:59,187 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-14 23:57:59,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:57:59,187 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-14 23:57:59,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:57:59,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:59,188 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:59,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-10-14 23:57:59,188 INFO L427 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:59,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:59,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1043136151, now seen corresponding path program 16 times [2020-10-14 23:57:59,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:59,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884480837] [2020-10-14 23:57:59,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:59,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:59,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:57:59,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:59,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-14 23:57:59,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:59,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:59,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:57:59,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:59,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:57:59,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:59,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:59,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:59,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:59,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:59,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:57:59,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:59,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:59,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:59,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:59,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:59,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:57:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:59,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884480837] [2020-10-14 23:57:59,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:59,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:57:59,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347287816] [2020-10-14 23:57:59,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:57:59,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:59,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:57:59,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:57:59,916 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 20 states. [2020-10-14 23:58:00,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:00,451 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2020-10-14 23:58:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:58:00,452 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-14 23:58:00,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:00,453 INFO L225 Difference]: With dead ends: 107 [2020-10-14 23:58:00,453 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 23:58:00,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:58:00,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 23:58:00,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 48. [2020-10-14 23:58:00,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 23:58:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-10-14 23:58:00,483 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 28 [2020-10-14 23:58:00,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:00,483 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-10-14 23:58:00,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:58:00,483 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-10-14 23:58:00,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:58:00,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:00,484 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:00,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-10-14 23:58:00,484 INFO L427 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:00,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:00,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1746524123, now seen corresponding path program 72 times [2020-10-14 23:58:00,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:00,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276835168] [2020-10-14 23:58:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:00,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:00,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:00,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:58:00,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:00,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-14 23:58:00,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:00,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:00,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:58:00,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:00,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:58:00,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:01,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:01,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:01,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:01,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:01,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:01,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:01,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:01,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:01,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:01,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:01,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:01,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:58:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:01,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276835168] [2020-10-14 23:58:01,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:01,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:58:01,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409872762] [2020-10-14 23:58:01,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:58:01,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:01,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:58:01,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:58:01,104 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 20 states. [2020-10-14 23:58:01,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:01,613 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-10-14 23:58:01,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:58:01,613 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-14 23:58:01,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:01,614 INFO L225 Difference]: With dead ends: 62 [2020-10-14 23:58:01,614 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 23:58:01,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:58:01,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 23:58:01,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-14 23:58:01,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 23:58:01,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-14 23:58:01,642 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 29 [2020-10-14 23:58:01,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:01,642 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-14 23:58:01,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:58:01,642 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-14 23:58:01,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:58:01,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:01,642 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:01,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-10-14 23:58:01,643 INFO L427 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:01,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:01,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1327058886, now seen corresponding path program 73 times [2020-10-14 23:58:01,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:01,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917050013] [2020-10-14 23:58:01,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:01,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:02,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:02,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:58:02,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:02,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-14 23:58:02,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:02,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:02,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:58:02,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:02,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:58:02,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:02,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:02,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:02,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:02,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:02,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:02,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:02,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:02,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:02,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:02,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:02,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:02,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:02,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917050013] [2020-10-14 23:58:02,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:02,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:58:02,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724762167] [2020-10-14 23:58:02,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:58:02,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:02,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:58:02,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:58:02,403 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 21 states. [2020-10-14 23:58:03,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:03,005 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-14 23:58:03,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:58:03,006 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-14 23:58:03,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:03,006 INFO L225 Difference]: With dead ends: 61 [2020-10-14 23:58:03,007 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 23:58:03,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:58:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 23:58:03,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2020-10-14 23:58:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:58:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-14 23:58:03,038 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 29 [2020-10-14 23:58:03,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:03,038 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-14 23:58:03,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:58:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-14 23:58:03,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:58:03,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:03,039 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:03,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2020-10-14 23:58:03,039 INFO L427 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:03,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:03,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1426206725, now seen corresponding path program 74 times [2020-10-14 23:58:03,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:03,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974205302] [2020-10-14 23:58:03,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:03,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:03,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:03,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:58:03,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:03,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-14 23:58:03,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:03,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:03,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:58:03,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:03,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:58:03,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:03,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:03,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:03,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:03,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:03,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:03,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:03,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:03,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:03,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:03,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:03,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:03,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:03,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974205302] [2020-10-14 23:58:03,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:03,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:58:03,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930714847] [2020-10-14 23:58:03,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:58:03,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:03,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:58:03,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:58:03,733 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 21 states. [2020-10-14 23:58:04,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:04,525 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-14 23:58:04,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:58:04,526 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-14 23:58:04,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:04,527 INFO L225 Difference]: With dead ends: 70 [2020-10-14 23:58:04,527 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 23:58:04,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:58:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 23:58:04,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2020-10-14 23:58:04,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:58:04,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-14 23:58:04,578 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 29 [2020-10-14 23:58:04,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:04,578 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-14 23:58:04,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:58:04,579 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-14 23:58:04,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:58:04,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:04,580 INFO L422 BasicCegarLoop]: trace histogram [11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:04,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2020-10-14 23:58:04,580 INFO L427 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:04,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:04,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1013763046, now seen corresponding path program 75 times [2020-10-14 23:58:04,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:04,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555426046] [2020-10-14 23:58:04,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:04,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:05,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:05,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:58:05,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:05,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-14 23:58:05,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:05,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:05,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:58:05,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:05,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:58:05,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:05,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:05,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:05,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:05,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:05,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:05,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:05,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:05,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:05,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:05,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:05,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:05,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:05,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555426046] [2020-10-14 23:58:05,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:05,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:58:05,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246483264] [2020-10-14 23:58:05,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:58:05,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:05,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:58:05,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:58:05,366 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 21 states. [2020-10-14 23:58:06,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:06,358 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-10-14 23:58:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:58:06,359 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-14 23:58:06,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:06,360 INFO L225 Difference]: With dead ends: 78 [2020-10-14 23:58:06,360 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 23:58:06,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:58:06,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 23:58:06,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 47. [2020-10-14 23:58:06,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:58:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-14 23:58:06,437 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 29 [2020-10-14 23:58:06,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:06,437 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-14 23:58:06,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:58:06,438 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-14 23:58:06,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:58:06,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:06,438 INFO L422 BasicCegarLoop]: trace histogram [12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:06,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2020-10-14 23:58:06,440 INFO L427 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:06,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1354846235, now seen corresponding path program 76 times [2020-10-14 23:58:06,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:06,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127414096] [2020-10-14 23:58:06,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:06,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:07,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:07,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:58:07,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:07,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-14 23:58:07,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:07,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:07,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:58:07,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:07,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:58:07,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:07,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:07,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:07,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:07,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:07,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:07,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:07,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:07,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:07,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:07,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:07,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:07,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:07,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127414096] [2020-10-14 23:58:07,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:07,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:58:07,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508000645] [2020-10-14 23:58:07,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:58:07,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:07,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:58:07,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:58:07,403 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 21 states. [2020-10-14 23:58:08,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:08,344 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-10-14 23:58:08,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 23:58:08,345 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-14 23:58:08,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:08,346 INFO L225 Difference]: With dead ends: 85 [2020-10-14 23:58:08,346 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 23:58:08,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:58:08,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 23:58:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 47. [2020-10-14 23:58:08,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:58:08,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-14 23:58:08,382 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 29 [2020-10-14 23:58:08,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:08,382 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-14 23:58:08,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:58:08,383 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-14 23:58:08,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:58:08,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:08,383 INFO L422 BasicCegarLoop]: trace histogram [13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:08,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2020-10-14 23:58:08,383 INFO L427 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:08,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:08,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1431252986, now seen corresponding path program 77 times [2020-10-14 23:58:08,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:08,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411523671] [2020-10-14 23:58:08,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:08,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:08,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:08,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:58:08,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:08,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-14 23:58:08,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:08,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:08,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:58:08,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:08,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:58:08,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:09,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:09,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:09,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:09,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:09,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:09,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:09,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:09,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:09,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:09,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:09,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:09,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:09,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411523671] [2020-10-14 23:58:09,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:09,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:58:09,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082831168] [2020-10-14 23:58:09,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:58:09,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:09,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:58:09,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:58:09,174 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 21 states. [2020-10-14 23:58:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:10,058 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2020-10-14 23:58:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:58:10,058 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-14 23:58:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:10,059 INFO L225 Difference]: With dead ends: 91 [2020-10-14 23:58:10,059 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 23:58:10,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:58:10,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 23:58:10,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 47. [2020-10-14 23:58:10,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:58:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-14 23:58:10,091 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 29 [2020-10-14 23:58:10,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:10,092 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-14 23:58:10,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:58:10,092 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-14 23:58:10,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:58:10,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:10,092 INFO L422 BasicCegarLoop]: trace histogram [14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:10,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2020-10-14 23:58:10,093 INFO L427 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:10,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:10,093 INFO L82 PathProgramCache]: Analyzing trace with hash -463886395, now seen corresponding path program 78 times [2020-10-14 23:58:10,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:10,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799602547] [2020-10-14 23:58:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:10,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:10,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:10,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:58:10,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:10,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-14 23:58:10,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:10,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:10,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:58:10,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:10,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:58:10,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:10,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:10,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:10,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:10,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:10,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:10,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:10,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:10,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:10,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:10,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:10,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:10,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:10,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799602547] [2020-10-14 23:58:10,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:10,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:58:10,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136033035] [2020-10-14 23:58:10,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:58:10,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:10,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:58:10,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:58:10,818 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 21 states. [2020-10-14 23:58:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:11,613 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2020-10-14 23:58:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:58:11,614 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-14 23:58:11,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:11,614 INFO L225 Difference]: With dead ends: 96 [2020-10-14 23:58:11,614 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 23:58:11,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:58:11,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 23:58:11,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 47. [2020-10-14 23:58:11,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:58:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-14 23:58:11,649 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 29 [2020-10-14 23:58:11,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:11,649 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-14 23:58:11,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:58:11,649 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-14 23:58:11,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:58:11,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:11,650 INFO L422 BasicCegarLoop]: trace histogram [15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:11,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2020-10-14 23:58:11,650 INFO L427 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:11,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:11,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1402512346, now seen corresponding path program 79 times [2020-10-14 23:58:11,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:11,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145155754] [2020-10-14 23:58:11,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:11,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:12,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:12,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:58:12,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:12,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-14 23:58:12,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:12,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:12,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:58:12,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:12,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:58:12,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:12,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:12,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:12,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:12,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:12,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:12,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:12,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:12,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:12,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:12,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:12,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:12,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:12,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145155754] [2020-10-14 23:58:12,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:12,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:58:12,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591845170] [2020-10-14 23:58:12,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:58:12,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:12,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:58:12,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:58:12,488 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 21 states. [2020-10-14 23:58:13,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:13,174 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2020-10-14 23:58:13,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:58:13,175 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-14 23:58:13,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:13,176 INFO L225 Difference]: With dead ends: 100 [2020-10-14 23:58:13,176 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 23:58:13,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:58:13,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 23:58:13,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 47. [2020-10-14 23:58:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:58:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-14 23:58:13,213 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 29 [2020-10-14 23:58:13,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:13,213 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-14 23:58:13,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:58:13,214 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-14 23:58:13,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:58:13,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:13,214 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:13,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2020-10-14 23:58:13,215 INFO L427 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:13,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:13,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1986979931, now seen corresponding path program 80 times [2020-10-14 23:58:13,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:13,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537039648] [2020-10-14 23:58:13,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:13,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:13,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:13,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:58:13,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:13,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 705 [2020-10-14 23:58:13,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:13,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:13,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:58:13,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:13,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:58:13,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:14,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:14,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:14,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:14,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:14,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:14,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:14,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:14,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:14,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:14,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:14,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:14,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:14,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537039648] [2020-10-14 23:58:14,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:14,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:58:14,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502509641] [2020-10-14 23:58:14,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:58:14,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:14,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:58:14,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:58:14,356 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 21 states. [2020-10-14 23:58:15,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:15,185 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2020-10-14 23:58:15,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:58:15,185 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-14 23:58:15,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:15,187 INFO L225 Difference]: With dead ends: 103 [2020-10-14 23:58:15,187 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 23:58:15,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:58:15,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 23:58:15,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 47. [2020-10-14 23:58:15,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:58:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-14 23:58:15,221 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 29 [2020-10-14 23:58:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:15,222 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-14 23:58:15,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:58:15,222 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-14 23:58:15,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:58:15,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:15,222 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:15,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2020-10-14 23:58:15,222 INFO L427 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:15,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:15,223 INFO L82 PathProgramCache]: Analyzing trace with hash 210923590, now seen corresponding path program 17 times [2020-10-14 23:58:15,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:15,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508229682] [2020-10-14 23:58:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:15,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:15,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:15,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:58:15,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:15,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-14 23:58:15,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:15,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:15,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:58:15,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:15,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:58:15,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:15,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:15,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:15,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:15,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:15,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:15,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:15,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:15,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:15,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:15,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:15,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:15,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:15,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508229682] [2020-10-14 23:58:15,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:15,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:58:15,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914298576] [2020-10-14 23:58:15,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:58:15,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:15,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:58:15,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:58:15,988 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 21 states. [2020-10-14 23:58:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:16,572 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2020-10-14 23:58:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:58:16,574 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-14 23:58:16,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:16,575 INFO L225 Difference]: With dead ends: 108 [2020-10-14 23:58:16,575 INFO L226 Difference]: Without dead ends: 103 [2020-10-14 23:58:16,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:58:16,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-14 23:58:16,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 49. [2020-10-14 23:58:16,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 23:58:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-10-14 23:58:16,611 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 29 [2020-10-14 23:58:16,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:16,611 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-10-14 23:58:16,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:58:16,612 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-10-14 23:58:16,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:58:16,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:16,612 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:16,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2020-10-14 23:58:16,612 INFO L427 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:16,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:16,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1775309738, now seen corresponding path program 81 times [2020-10-14 23:58:16,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:16,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274697362] [2020-10-14 23:58:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:16,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:17,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:17,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:58:17,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:17,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-14 23:58:17,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:17,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:17,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:58:17,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:17,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 23:58:17,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:17,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:17,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:17,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:17,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:17,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:17,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:17,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:17,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:17,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:17,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:17,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:17,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:17,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274697362] [2020-10-14 23:58:17,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:17,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:58:17,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27798884] [2020-10-14 23:58:17,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:58:17,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:17,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:58:17,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:58:17,222 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 14 states. [2020-10-14 23:58:17,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:17,508 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2020-10-14 23:58:17,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:58:17,509 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-14 23:58:17,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:17,509 INFO L225 Difference]: With dead ends: 63 [2020-10-14 23:58:17,510 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 23:58:17,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:58:17,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 23:58:17,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-10-14 23:58:17,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 23:58:17,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-14 23:58:17,549 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2020-10-14 23:58:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:17,550 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-14 23:58:17,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:58:17,550 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-14 23:58:17,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:58:17,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:17,550 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:17,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2020-10-14 23:58:17,551 INFO L427 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:17,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:17,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1298273271, now seen corresponding path program 82 times [2020-10-14 23:58:17,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:17,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769936341] [2020-10-14 23:58:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:17,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:17,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:17,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:58:17,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:17,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-14 23:58:17,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:17,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:58:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:17,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:58:17,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:18,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:18,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:18,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:18,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:18,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:18,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:18,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:18,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:18,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:18,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:18,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:18,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:18,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769936341] [2020-10-14 23:58:18,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:18,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:58:18,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450242203] [2020-10-14 23:58:18,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:58:18,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:18,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:58:18,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:58:18,326 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 22 states. [2020-10-14 23:58:19,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:19,205 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-14 23:58:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:58:19,207 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-14 23:58:19,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:19,208 INFO L225 Difference]: With dead ends: 75 [2020-10-14 23:58:19,208 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 23:58:19,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:58:19,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 23:58:19,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2020-10-14 23:58:19,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 23:58:19,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-14 23:58:19,256 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2020-10-14 23:58:19,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:19,257 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-14 23:58:19,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:58:19,257 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-14 23:58:19,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:58:19,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:19,257 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:19,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2020-10-14 23:58:19,258 INFO L427 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:19,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:19,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1397421110, now seen corresponding path program 83 times [2020-10-14 23:58:19,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:19,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596270900] [2020-10-14 23:58:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:19,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:19,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:19,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:58:19,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:19,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-14 23:58:19,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:19,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:19,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:58:19,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:19,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:58:19,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:20,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:20,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:20,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:20,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:20,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:20,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:20,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:20,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:20,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:20,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:20,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:20,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:20,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596270900] [2020-10-14 23:58:20,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:20,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:58:20,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372549333] [2020-10-14 23:58:20,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:58:20,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:20,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:58:20,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:58:20,111 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 22 states. [2020-10-14 23:58:21,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:21,232 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-10-14 23:58:21,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 23:58:21,233 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-14 23:58:21,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:21,233 INFO L225 Difference]: With dead ends: 84 [2020-10-14 23:58:21,234 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 23:58:21,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=1638, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:58:21,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 23:58:21,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2020-10-14 23:58:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 23:58:21,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-14 23:58:21,281 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2020-10-14 23:58:21,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:21,282 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-14 23:58:21,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:58:21,282 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-14 23:58:21,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:58:21,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:21,282 INFO L422 BasicCegarLoop]: trace histogram [12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:21,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2020-10-14 23:58:21,283 INFO L427 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:21,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:21,283 INFO L82 PathProgramCache]: Analyzing trace with hash 984977431, now seen corresponding path program 84 times [2020-10-14 23:58:21,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:21,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587271563] [2020-10-14 23:58:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:21,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:21,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:21,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:58:21,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:21,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-14 23:58:21,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:21,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:21,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:58:21,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:21,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:58:21,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:22,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:22,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:22,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:22,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:22,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:22,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:22,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:22,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:22,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:22,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:22,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:22,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:22,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587271563] [2020-10-14 23:58:22,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:22,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:58:22,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987545751] [2020-10-14 23:58:22,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:58:22,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:22,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:58:22,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:58:22,025 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 22 states. [2020-10-14 23:58:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:23,231 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2020-10-14 23:58:23,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 23:58:23,236 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-14 23:58:23,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:23,237 INFO L225 Difference]: With dead ends: 92 [2020-10-14 23:58:23,237 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 23:58:23,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=171, Invalid=1721, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 23:58:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 23:58:23,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 50. [2020-10-14 23:58:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 23:58:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-14 23:58:23,286 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2020-10-14 23:58:23,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:23,286 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-14 23:58:23,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:58:23,286 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-14 23:58:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:58:23,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:23,286 INFO L422 BasicCegarLoop]: trace histogram [13, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:23,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2020-10-14 23:58:23,287 INFO L427 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:23,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:23,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1383631850, now seen corresponding path program 85 times [2020-10-14 23:58:23,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:23,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253295876] [2020-10-14 23:58:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:23,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:23,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:23,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:58:23,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:23,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-10-14 23:58:23,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:23,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:23,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:58:23,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:23,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:58:23,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:24,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:24,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:24,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:24,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:24,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:24,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:24,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:24,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:24,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:24,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:24,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:24,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:24,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253295876] [2020-10-14 23:58:24,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:24,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:58:24,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874681287] [2020-10-14 23:58:24,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:58:24,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:24,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:58:24,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:58:24,213 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 22 states. [2020-10-14 23:58:25,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:25,398 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2020-10-14 23:58:25,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 23:58:25,399 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-14 23:58:25,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:25,399 INFO L225 Difference]: With dead ends: 99 [2020-10-14 23:58:25,399 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 23:58:25,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=1566, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 23:58:25,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 23:58:25,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 50. [2020-10-14 23:58:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 23:58:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-14 23:58:25,445 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2020-10-14 23:58:25,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:25,445 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-14 23:58:25,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:58:25,445 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-14 23:58:25,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:58:25,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:25,446 INFO L422 BasicCegarLoop]: trace histogram [14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:25,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2020-10-14 23:58:25,446 INFO L427 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:25,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:25,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1460038601, now seen corresponding path program 86 times [2020-10-14 23:58:25,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:25,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488135212] [2020-10-14 23:58:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:25,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:25,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:25,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:58:25,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:25,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 452 [2020-10-14 23:58:25,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:25,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:25,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:58:25,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:25,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:58:25,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:26,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:26,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:26,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:26,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:26,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:26,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:26,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:26,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:26,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:26,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:26,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:26,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:26,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488135212] [2020-10-14 23:58:26,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:26,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:58:26,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807603589] [2020-10-14 23:58:26,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:58:26,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:26,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:58:26,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:58:26,321 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 22 states. [2020-10-14 23:58:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:27,546 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2020-10-14 23:58:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:58:27,547 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-14 23:58:27,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:27,548 INFO L225 Difference]: With dead ends: 105 [2020-10-14 23:58:27,548 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 23:58:27,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:58:27,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 23:58:27,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 50. [2020-10-14 23:58:27,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 23:58:27,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-14 23:58:27,662 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2020-10-14 23:58:27,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:27,662 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-14 23:58:27,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:58:27,662 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-14 23:58:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:58:27,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:27,663 INFO L422 BasicCegarLoop]: trace histogram [15, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:27,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2020-10-14 23:58:27,663 INFO L427 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:27,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:27,664 INFO L82 PathProgramCache]: Analyzing trace with hash -492672010, now seen corresponding path program 87 times [2020-10-14 23:58:27,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:27,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117175607] [2020-10-14 23:58:27,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:27,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:28,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:28,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:58:28,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:28,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 659 [2020-10-14 23:58:28,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:28,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:28,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:58:28,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:28,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:58:28,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:28,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:28,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:28,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:28,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:28,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:28,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:28,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:28,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:28,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:28,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:28,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:28,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:28,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117175607] [2020-10-14 23:58:28,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:28,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:58:28,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215736122] [2020-10-14 23:58:28,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:58:28,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:28,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:58:28,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:58:28,746 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 22 states. [2020-10-14 23:58:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:29,677 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2020-10-14 23:58:29,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:58:29,678 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-14 23:58:29,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:29,678 INFO L225 Difference]: With dead ends: 110 [2020-10-14 23:58:29,679 INFO L226 Difference]: Without dead ends: 105 [2020-10-14 23:58:29,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:58:29,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-14 23:58:29,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 50. [2020-10-14 23:58:29,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 23:58:29,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-14 23:58:29,724 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2020-10-14 23:58:29,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:29,724 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-14 23:58:29,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:58:29,724 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-14 23:58:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:58:29,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:29,724 INFO L422 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:29,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2020-10-14 23:58:29,725 INFO L427 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:29,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:29,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1431297961, now seen corresponding path program 88 times [2020-10-14 23:58:29,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:29,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422302645] [2020-10-14 23:58:29,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:29,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:30,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:30,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:58:30,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:30,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-14 23:58:30,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:30,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:30,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:58:30,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:30,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:58:30,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:30,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:30,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:30,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:30,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:30,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:30,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:30,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:30,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:30,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:30,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:30,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:30,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:30,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422302645] [2020-10-14 23:58:30,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:30,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:58:30,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166026675] [2020-10-14 23:58:30,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:58:30,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:30,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:58:30,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:58:30,605 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 22 states. [2020-10-14 23:58:31,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:31,380 INFO L93 Difference]: Finished difference Result 114 states and 132 transitions. [2020-10-14 23:58:31,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:58:31,389 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-14 23:58:31,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:31,389 INFO L225 Difference]: With dead ends: 114 [2020-10-14 23:58:31,390 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 23:58:31,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:58:31,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 23:58:31,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 50. [2020-10-14 23:58:31,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 23:58:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-14 23:58:31,441 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2020-10-14 23:58:31,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:31,442 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-14 23:58:31,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:58:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-14 23:58:31,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:58:31,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:31,442 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:31,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2020-10-14 23:58:31,442 INFO L427 AbstractCegarLoop]: === Iteration 108 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:31,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2015765546, now seen corresponding path program 89 times [2020-10-14 23:58:31,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:31,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003378331] [2020-10-14 23:58:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:31,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:31,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:31,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:58:31,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:31,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 532 [2020-10-14 23:58:31,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:31,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:31,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:58:31,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:31,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:58:31,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:32,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:32,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:32,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:32,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:32,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:32,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:32,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:32,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:32,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:32,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003378331] [2020-10-14 23:58:32,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:32,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:58:32,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563626744] [2020-10-14 23:58:32,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:58:32,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:32,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:58:32,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:58:32,383 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 22 states. [2020-10-14 23:58:33,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:33,118 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2020-10-14 23:58:33,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:58:33,119 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-14 23:58:33,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:33,120 INFO L225 Difference]: With dead ends: 117 [2020-10-14 23:58:33,120 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 23:58:33,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:58:33,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 23:58:33,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 50. [2020-10-14 23:58:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 23:58:33,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-14 23:58:33,167 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2020-10-14 23:58:33,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:33,167 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-14 23:58:33,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:58:33,167 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-14 23:58:33,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:58:33,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:33,167 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:33,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2020-10-14 23:58:33,168 INFO L427 AbstractCegarLoop]: === Iteration 109 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:33,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:33,168 INFO L82 PathProgramCache]: Analyzing trace with hash 182137975, now seen corresponding path program 18 times [2020-10-14 23:58:33,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:33,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321102343] [2020-10-14 23:58:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:33,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:33,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:33,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:58:33,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:33,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 549 [2020-10-14 23:58:33,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:33,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:33,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:58:33,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:33,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:58:33,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:34,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:34,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:34,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:34,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:34,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:34,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:34,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:34,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:34,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:34,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:34,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:34,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:34,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321102343] [2020-10-14 23:58:34,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:34,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:58:34,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373688069] [2020-10-14 23:58:34,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:58:34,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:34,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:58:34,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:58:34,130 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 22 states. [2020-10-14 23:58:34,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:34,819 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2020-10-14 23:58:34,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:58:34,820 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-14 23:58:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:34,821 INFO L225 Difference]: With dead ends: 122 [2020-10-14 23:58:34,821 INFO L226 Difference]: Without dead ends: 117 [2020-10-14 23:58:34,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:58:34,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-14 23:58:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 52. [2020-10-14 23:58:34,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 23:58:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2020-10-14 23:58:34,871 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 30 [2020-10-14 23:58:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:34,871 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2020-10-14 23:58:34,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:58:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2020-10-14 23:58:34,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:58:34,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:34,872 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:34,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2020-10-14 23:58:34,872 INFO L427 AbstractCegarLoop]: === Iteration 110 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:34,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:34,872 INFO L82 PathProgramCache]: Analyzing trace with hash 835510726, now seen corresponding path program 90 times [2020-10-14 23:58:34,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:34,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20923459] [2020-10-14 23:58:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:34,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:35,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:58:35,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:35,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-14 23:58:35,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:35,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:35,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:58:35,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:35,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:58:35,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:35,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:35,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:35,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:35,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:35,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:35,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:35,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:35,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:35,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:35,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:35,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:35,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20923459] [2020-10-14 23:58:35,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:35,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:58:35,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018827716] [2020-10-14 23:58:35,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:58:35,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:35,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:58:35,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:58:35,694 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 22 states. [2020-10-14 23:58:36,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:36,304 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2020-10-14 23:58:36,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:58:36,305 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-14 23:58:36,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:36,305 INFO L225 Difference]: With dead ends: 67 [2020-10-14 23:58:36,306 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 23:58:36,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:58:36,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 23:58:36,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-14 23:58:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 23:58:36,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-14 23:58:36,348 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 31 [2020-10-14 23:58:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:36,349 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-14 23:58:36,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:58:36,349 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-14 23:58:36,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:58:36,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:36,350 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:36,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2020-10-14 23:58:36,350 INFO L427 AbstractCegarLoop]: === Iteration 111 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:36,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:36,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1627303493, now seen corresponding path program 91 times [2020-10-14 23:58:36,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:36,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851615471] [2020-10-14 23:58:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:36,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:36,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:36,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:58:36,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:36,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 479 [2020-10-14 23:58:36,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:36,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:36,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:58:36,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:36,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:58:36,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:37,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:37,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:37,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:37,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:37,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:37,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:37,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:37,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:37,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:37,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:37,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:37,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:37,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851615471] [2020-10-14 23:58:37,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:37,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:58:37,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145780004] [2020-10-14 23:58:37,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:58:37,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:37,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:58:37,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:58:37,298 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 23 states. [2020-10-14 23:58:37,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:37,963 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-10-14 23:58:37,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:58:37,964 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-14 23:58:37,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:37,965 INFO L225 Difference]: With dead ends: 66 [2020-10-14 23:58:37,965 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 23:58:37,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:58:37,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 23:58:38,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2020-10-14 23:58:38,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:58:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-14 23:58:38,037 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 31 [2020-10-14 23:58:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:38,037 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-14 23:58:38,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:58:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-14 23:58:38,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:58:38,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:38,038 INFO L422 BasicCegarLoop]: trace histogram [11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:38,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2020-10-14 23:58:38,039 INFO L427 AbstractCegarLoop]: === Iteration 112 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:38,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:38,039 INFO L82 PathProgramCache]: Analyzing trace with hash 405919206, now seen corresponding path program 92 times [2020-10-14 23:58:38,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:38,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044809121] [2020-10-14 23:58:38,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:38,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:38,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:38,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:58:38,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:38,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 465 [2020-10-14 23:58:38,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:38,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:38,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:58:38,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:38,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:58:38,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:38,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:38,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:38,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:38,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:38,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:38,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:38,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:38,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:38,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:38,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:38,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:38,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:38,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044809121] [2020-10-14 23:58:38,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:38,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:58:38,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71579237] [2020-10-14 23:58:38,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:58:38,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:38,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:58:38,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:58:38,976 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 23 states. [2020-10-14 23:58:39,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:39,989 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-14 23:58:39,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:58:39,990 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-14 23:58:39,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:39,991 INFO L225 Difference]: With dead ends: 76 [2020-10-14 23:58:39,991 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 23:58:39,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=149, Invalid=1411, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 23:58:39,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 23:58:40,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2020-10-14 23:58:40,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:58:40,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-14 23:58:40,055 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 31 [2020-10-14 23:58:40,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:40,055 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-14 23:58:40,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:58:40,055 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-14 23:58:40,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:58:40,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:40,056 INFO L422 BasicCegarLoop]: trace histogram [12, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:40,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2020-10-14 23:58:40,056 INFO L427 AbstractCegarLoop]: === Iteration 113 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:40,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:40,057 INFO L82 PathProgramCache]: Analyzing trace with hash 505067045, now seen corresponding path program 93 times [2020-10-14 23:58:40,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:40,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380550836] [2020-10-14 23:58:40,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:40,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:40,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:58:40,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:40,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-14 23:58:40,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:40,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:40,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:58:40,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:40,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:58:40,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:40,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:40,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:40,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:40,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:40,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:40,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:40,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:40,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:40,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:40,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:40,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:40,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380550836] [2020-10-14 23:58:40,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:40,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:58:40,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198951637] [2020-10-14 23:58:40,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:58:40,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:40,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:58:40,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:58:40,990 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 23 states. [2020-10-14 23:58:42,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:42,209 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-10-14 23:58:42,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 23:58:42,210 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-14 23:58:42,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:42,211 INFO L225 Difference]: With dead ends: 85 [2020-10-14 23:58:42,211 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 23:58:42,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=170, Invalid=1722, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 23:58:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 23:58:42,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 51. [2020-10-14 23:58:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:58:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-14 23:58:42,272 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 31 [2020-10-14 23:58:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:42,273 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-14 23:58:42,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:58:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-14 23:58:42,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:58:42,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:42,274 INFO L422 BasicCegarLoop]: trace histogram [13, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:42,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2020-10-14 23:58:42,274 INFO L427 AbstractCegarLoop]: === Iteration 114 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:42,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:42,274 INFO L82 PathProgramCache]: Analyzing trace with hash 92623366, now seen corresponding path program 94 times [2020-10-14 23:58:42,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:42,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218991199] [2020-10-14 23:58:42,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:42,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:42,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:42,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:58:42,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:42,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-14 23:58:42,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:42,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:42,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:58:42,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:42,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:58:42,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:43,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:43,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:43,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:43,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:43,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:43,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:43,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:43,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:43,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:43,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:43,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:43,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:43,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218991199] [2020-10-14 23:58:43,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:43,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:58:43,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508830374] [2020-10-14 23:58:43,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:58:43,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:43,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:58:43,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:58:43,176 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 23 states. [2020-10-14 23:58:44,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:44,421 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2020-10-14 23:58:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 23:58:44,422 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-14 23:58:44,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:44,423 INFO L225 Difference]: With dead ends: 93 [2020-10-14 23:58:44,423 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 23:58:44,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=173, Invalid=1807, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:58:44,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 23:58:44,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2020-10-14 23:58:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:58:44,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-14 23:58:44,476 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 31 [2020-10-14 23:58:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:44,476 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-14 23:58:44,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:58:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-14 23:58:44,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:58:44,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:44,476 INFO L422 BasicCegarLoop]: trace histogram [14, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:44,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2020-10-14 23:58:44,477 INFO L427 AbstractCegarLoop]: === Iteration 115 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:44,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:44,477 INFO L82 PathProgramCache]: Analyzing trace with hash 2018981381, now seen corresponding path program 95 times [2020-10-14 23:58:44,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:44,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671597072] [2020-10-14 23:58:44,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:44,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:44,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:44,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:58:44,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:44,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-14 23:58:44,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:44,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:44,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:58:44,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:44,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:58:44,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:45,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:45,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:45,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:45,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:45,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:45,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:45,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:45,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:45,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:45,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:45,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:45,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:45,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671597072] [2020-10-14 23:58:45,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:45,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:58:45,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426034464] [2020-10-14 23:58:45,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:58:45,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:45,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:58:45,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:58:45,415 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 23 states. [2020-10-14 23:58:46,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:46,700 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2020-10-14 23:58:46,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 23:58:46,701 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-14 23:58:46,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:46,702 INFO L225 Difference]: With dead ends: 100 [2020-10-14 23:58:46,702 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 23:58:46,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=158, Invalid=1648, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:58:46,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 23:58:46,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 51. [2020-10-14 23:58:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:58:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-14 23:58:46,768 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 31 [2020-10-14 23:58:46,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:46,769 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-14 23:58:46,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:58:46,769 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-14 23:58:46,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:58:46,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:46,769 INFO L422 BasicCegarLoop]: trace histogram [15, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:46,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2020-10-14 23:58:46,770 INFO L427 AbstractCegarLoop]: === Iteration 116 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:46,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:46,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1942574630, now seen corresponding path program 96 times [2020-10-14 23:58:46,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:46,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990506415] [2020-10-14 23:58:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:46,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:47,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:47,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:58:47,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:47,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 486 [2020-10-14 23:58:47,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:47,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:47,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:58:47,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:47,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:58:47,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:47,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:47,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:47,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:47,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:47,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:47,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:47,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:47,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:47,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:47,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:47,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:47,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:47,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990506415] [2020-10-14 23:58:47,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:47,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:58:47,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353720905] [2020-10-14 23:58:47,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:58:47,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:47,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:58:47,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:58:47,728 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 23 states. [2020-10-14 23:58:48,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:48,850 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2020-10-14 23:58:48,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 23:58:48,850 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-14 23:58:48,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:48,851 INFO L225 Difference]: With dead ends: 106 [2020-10-14 23:58:48,851 INFO L226 Difference]: Without dead ends: 101 [2020-10-14 23:58:48,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:58:48,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-14 23:58:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 51. [2020-10-14 23:58:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:58:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-14 23:58:48,909 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 31 [2020-10-14 23:58:48,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:48,909 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-14 23:58:48,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:58:48,910 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-14 23:58:48,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:58:48,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:48,910 INFO L422 BasicCegarLoop]: trace histogram [16, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:48,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2020-10-14 23:58:48,910 INFO L427 AbstractCegarLoop]: === Iteration 117 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:48,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:48,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1385026075, now seen corresponding path program 97 times [2020-10-14 23:58:48,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:48,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009465380] [2020-10-14 23:58:48,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:48,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:49,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:49,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:58:49,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:49,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-14 23:58:49,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:49,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:49,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:58:49,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:49,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:58:49,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:49,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:49,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:49,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:49,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:49,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:49,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:49,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:49,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:49,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:49,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:49,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:49,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:49,856 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:49,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009465380] [2020-10-14 23:58:49,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:49,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:58:49,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827296457] [2020-10-14 23:58:49,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:58:49,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:49,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:58:49,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:58:49,858 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 23 states. [2020-10-14 23:58:50,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:50,839 INFO L93 Difference]: Finished difference Result 111 states and 128 transitions. [2020-10-14 23:58:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 23:58:50,841 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-14 23:58:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:50,841 INFO L225 Difference]: With dead ends: 111 [2020-10-14 23:58:50,842 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 23:58:50,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:58:50,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 23:58:50,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 51. [2020-10-14 23:58:50,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:58:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-14 23:58:50,912 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 31 [2020-10-14 23:58:50,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:50,913 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-14 23:58:50,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:58:50,913 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-14 23:58:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:58:50,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:50,913 INFO L422 BasicCegarLoop]: trace histogram [17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:50,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2020-10-14 23:58:50,913 INFO L427 AbstractCegarLoop]: === Iteration 118 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:50,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1971315270, now seen corresponding path program 98 times [2020-10-14 23:58:50,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:50,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473516381] [2020-10-14 23:58:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:50,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:51,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:51,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:58:51,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:51,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 525 [2020-10-14 23:58:51,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:51,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:51,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:58:51,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:51,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:58:51,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:51,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:51,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:51,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:51,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:51,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:51,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:51,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:51,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:51,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:51,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:51,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:51,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:51,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473516381] [2020-10-14 23:58:51,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:51,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:58:51,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790398832] [2020-10-14 23:58:51,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:58:51,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:51,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:58:51,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:58:51,907 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 23 states. [2020-10-14 23:58:52,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:52,825 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2020-10-14 23:58:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:58:52,826 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-14 23:58:52,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:52,827 INFO L225 Difference]: With dead ends: 115 [2020-10-14 23:58:52,827 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 23:58:52,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:58:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 23:58:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 51. [2020-10-14 23:58:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:58:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-14 23:58:52,882 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 31 [2020-10-14 23:58:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:52,882 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-14 23:58:52,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:58:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-14 23:58:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:58:52,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:52,883 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:52,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2020-10-14 23:58:52,883 INFO L427 AbstractCegarLoop]: === Iteration 119 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:52,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:52,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1386847685, now seen corresponding path program 99 times [2020-10-14 23:58:52,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:52,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813759351] [2020-10-14 23:58:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:52,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:53,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:53,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:58:53,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:53,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-14 23:58:53,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:53,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:58:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:53,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:58:53,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:53,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:53,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:53,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:53,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:53,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:53,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:53,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:53,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:53,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:53,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:53,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:53,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:53,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813759351] [2020-10-14 23:58:53,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:53,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:58:53,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038713450] [2020-10-14 23:58:53,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:58:53,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:53,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:58:53,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:58:53,965 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 23 states. [2020-10-14 23:58:54,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:54,817 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2020-10-14 23:58:54,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:58:54,818 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-14 23:58:54,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:54,819 INFO L225 Difference]: With dead ends: 118 [2020-10-14 23:58:54,819 INFO L226 Difference]: Without dead ends: 113 [2020-10-14 23:58:54,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:58:54,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-14 23:58:54,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 51. [2020-10-14 23:58:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:58:54,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-14 23:58:54,909 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 31 [2020-10-14 23:58:54,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:54,909 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-14 23:58:54,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:58:54,909 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-14 23:58:54,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:58:54,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:54,910 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:54,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2020-10-14 23:58:54,910 INFO L427 AbstractCegarLoop]: === Iteration 120 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:54,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:54,910 INFO L82 PathProgramCache]: Analyzing trace with hash -710216090, now seen corresponding path program 19 times [2020-10-14 23:58:54,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:54,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503889232] [2020-10-14 23:58:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:54,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:55,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:55,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:58:55,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:55,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-14 23:58:55,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:55,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:58:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:55,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:58:55,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:55,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:55,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:55,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:55,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:55,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:55,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:55,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:55,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:55,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:55,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:55,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:55,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:55,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503889232] [2020-10-14 23:58:55,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:55,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:58:55,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140275696] [2020-10-14 23:58:55,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:58:55,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:55,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:58:55,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:58:55,977 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 23 states. [2020-10-14 23:58:56,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:56,791 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2020-10-14 23:58:56,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:58:56,792 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-14 23:58:56,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:56,793 INFO L225 Difference]: With dead ends: 123 [2020-10-14 23:58:56,793 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 23:58:56,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:58:56,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 23:58:56,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 53. [2020-10-14 23:58:56,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 23:58:56,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-10-14 23:58:56,848 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 31 [2020-10-14 23:58:56,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:56,848 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-10-14 23:58:56,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:58:56,848 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-10-14 23:58:56,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:58:56,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:56,849 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:56,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2020-10-14 23:58:56,849 INFO L427 AbstractCegarLoop]: === Iteration 121 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:56,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:56,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1057661513, now seen corresponding path program 100 times [2020-10-14 23:58:56,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:56,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700012760] [2020-10-14 23:58:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:56,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:57,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:57,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:58:57,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:57,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 483 [2020-10-14 23:58:57,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:57,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:57,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:58:57,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:57,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 23:58:57,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:57,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:57,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:57,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:57,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:57,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:57,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:57,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:57,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:57,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:57,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:57,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:57,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:57,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700012760] [2020-10-14 23:58:57,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:57,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:58:57,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229763833] [2020-10-14 23:58:57,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:58:57,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:57,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:58:57,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:58:57,665 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 16 states. [2020-10-14 23:58:58,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:58,091 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2020-10-14 23:58:58,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:58:58,092 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2020-10-14 23:58:58,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:58,093 INFO L225 Difference]: With dead ends: 68 [2020-10-14 23:58:58,093 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 23:58:58,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:58:58,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 23:58:58,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2020-10-14 23:58:58,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 23:58:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-10-14 23:58:58,155 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2020-10-14 23:58:58,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:58,155 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-10-14 23:58:58,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:58:58,155 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-10-14 23:58:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:58:58,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:58,156 INFO L422 BasicCegarLoop]: trace histogram [11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:58,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2020-10-14 23:58:58,156 INFO L427 AbstractCegarLoop]: === Iteration 122 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:58,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:58,156 INFO L82 PathProgramCache]: Analyzing trace with hash -265868746, now seen corresponding path program 101 times [2020-10-14 23:58:58,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:58,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558977337] [2020-10-14 23:58:58,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:58,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:58,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:58,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:58:58,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:58,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-14 23:58:58,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:58,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:58,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:58:58,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:58,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:58:58,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:59,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:59,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:59,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:59,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:59,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:59,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:59,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:59,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:59,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:59,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:59,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:59,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:59,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558977337] [2020-10-14 23:58:59,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:59,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:58:59,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235303719] [2020-10-14 23:58:59,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:58:59,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:59,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:58:59,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:58:59,139 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 24 states. [2020-10-14 23:59:00,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:00,279 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-10-14 23:59:00,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 23:59:00,280 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-14 23:59:00,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:00,280 INFO L225 Difference]: With dead ends: 81 [2020-10-14 23:59:00,280 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 23:59:00,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=164, Invalid=1642, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:59:00,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 23:59:00,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2020-10-14 23:59:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 23:59:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-10-14 23:59:00,359 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2020-10-14 23:59:00,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:00,359 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-10-14 23:59:00,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:59:00,359 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-10-14 23:59:00,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:59:00,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:00,360 INFO L422 BasicCegarLoop]: trace histogram [12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:00,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2020-10-14 23:59:00,360 INFO L427 AbstractCegarLoop]: === Iteration 123 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:00,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:00,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1487253033, now seen corresponding path program 102 times [2020-10-14 23:59:00,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:00,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030819257] [2020-10-14 23:59:00,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:00,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:00,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:00,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:59:00,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:00,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-14 23:59:00,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:00,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:00,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:59:00,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:00,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:59:00,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:01,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:01,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:01,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:01,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:01,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:01,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:01,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:01,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:01,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:01,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:01,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:01,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:01,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030819257] [2020-10-14 23:59:01,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:01,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:59:01,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047797677] [2020-10-14 23:59:01,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:59:01,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:01,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:59:01,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:59:01,412 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 24 states. [2020-10-14 23:59:02,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:02,833 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2020-10-14 23:59:02,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 23:59:02,834 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-14 23:59:02,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:02,834 INFO L225 Difference]: With dead ends: 91 [2020-10-14 23:59:02,834 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 23:59:02,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=191, Invalid=2065, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 23:59:02,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 23:59:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2020-10-14 23:59:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 23:59:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-10-14 23:59:02,905 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2020-10-14 23:59:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:02,905 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-10-14 23:59:02,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:59:02,905 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-10-14 23:59:02,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:59:02,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:02,906 INFO L422 BasicCegarLoop]: trace histogram [13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:02,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2020-10-14 23:59:02,906 INFO L427 AbstractCegarLoop]: === Iteration 124 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:02,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:02,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1388105194, now seen corresponding path program 103 times [2020-10-14 23:59:02,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:02,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108348428] [2020-10-14 23:59:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:02,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:03,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:03,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:59:03,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:03,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-14 23:59:03,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:03,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:03,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:59:03,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:03,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:59:03,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:03,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:03,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:03,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:03,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:03,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:03,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:03,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:03,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:03,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:03,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:03,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:03,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:03,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108348428] [2020-10-14 23:59:03,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:03,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:59:03,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651407959] [2020-10-14 23:59:03,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:59:03,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:03,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:59:03,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:59:03,913 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 24 states. [2020-10-14 23:59:05,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:05,529 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2020-10-14 23:59:05,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 23:59:05,530 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-14 23:59:05,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:05,531 INFO L225 Difference]: With dead ends: 100 [2020-10-14 23:59:05,531 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 23:59:05,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=200, Invalid=2250, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 23:59:05,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 23:59:05,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 54. [2020-10-14 23:59:05,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 23:59:05,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-10-14 23:59:05,601 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2020-10-14 23:59:05,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:05,601 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-10-14 23:59:05,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:59:05,601 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-10-14 23:59:05,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:59:05,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:05,602 INFO L422 BasicCegarLoop]: trace histogram [14, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:05,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2020-10-14 23:59:05,602 INFO L427 AbstractCegarLoop]: === Iteration 125 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:05,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:05,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1800548873, now seen corresponding path program 104 times [2020-10-14 23:59:05,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:05,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295977287] [2020-10-14 23:59:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:05,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:06,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:59:06,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:06,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 865 [2020-10-14 23:59:06,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:06,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:06,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:59:06,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:06,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:59:06,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:06,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:06,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:06,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:06,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:06,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:06,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:06,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:06,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:06,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:06,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:06,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:06,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295977287] [2020-10-14 23:59:06,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:06,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:59:06,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497899906] [2020-10-14 23:59:06,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:59:06,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:06,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:59:06,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:59:06,977 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 24 states. [2020-10-14 23:59:08,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:08,560 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2020-10-14 23:59:08,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 23:59:08,561 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-14 23:59:08,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:08,561 INFO L225 Difference]: With dead ends: 108 [2020-10-14 23:59:08,562 INFO L226 Difference]: Without dead ends: 103 [2020-10-14 23:59:08,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=191, Invalid=2161, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 23:59:08,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-14 23:59:08,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 54. [2020-10-14 23:59:08,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 23:59:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-10-14 23:59:08,634 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2020-10-14 23:59:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:08,634 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-10-14 23:59:08,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:59:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-10-14 23:59:08,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:59:08,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:08,635 INFO L422 BasicCegarLoop]: trace histogram [15, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:08,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2020-10-14 23:59:08,635 INFO L427 AbstractCegarLoop]: === Iteration 126 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:08,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:08,635 INFO L82 PathProgramCache]: Analyzing trace with hash 125809142, now seen corresponding path program 105 times [2020-10-14 23:59:08,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:08,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045564417] [2020-10-14 23:59:08,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:08,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:09,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:09,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:59:09,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:09,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 607 [2020-10-14 23:59:09,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:09,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:09,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:59:09,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:09,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:59:09,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:09,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:09,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:09,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:09,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:09,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:09,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:09,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:09,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:09,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:09,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:09,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:09,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:09,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045564417] [2020-10-14 23:59:09,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:09,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:59:09,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84731312] [2020-10-14 23:59:09,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:59:09,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:09,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:59:09,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:59:09,755 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 24 states. [2020-10-14 23:59:11,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:11,253 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2020-10-14 23:59:11,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 23:59:11,255 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-14 23:59:11,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:11,255 INFO L225 Difference]: With dead ends: 115 [2020-10-14 23:59:11,256 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 23:59:11,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=164, Invalid=1816, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:59:11,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 23:59:11,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 54. [2020-10-14 23:59:11,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 23:59:11,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-10-14 23:59:11,326 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2020-10-14 23:59:11,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:11,327 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-10-14 23:59:11,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:59:11,327 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-10-14 23:59:11,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:59:11,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:11,334 INFO L422 BasicCegarLoop]: trace histogram [16, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:11,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2020-10-14 23:59:11,334 INFO L427 AbstractCegarLoop]: === Iteration 127 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:11,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:11,334 INFO L82 PathProgramCache]: Analyzing trace with hash 49402391, now seen corresponding path program 106 times [2020-10-14 23:59:11,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:11,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640110815] [2020-10-14 23:59:11,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:11,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:11,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:11,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:59:11,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:11,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-14 23:59:11,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:11,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:11,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:59:11,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:11,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:59:11,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:12,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:12,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:12,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:12,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:12,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:12,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:12,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:12,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:12,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:12,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:12,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:12,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:12,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640110815] [2020-10-14 23:59:12,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:12,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:59:12,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140954434] [2020-10-14 23:59:12,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:59:12,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:12,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:59:12,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:59:12,339 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 24 states. [2020-10-14 23:59:13,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:13,648 INFO L93 Difference]: Finished difference Result 121 states and 139 transitions. [2020-10-14 23:59:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 23:59:13,649 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-14 23:59:13,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:13,650 INFO L225 Difference]: With dead ends: 121 [2020-10-14 23:59:13,650 INFO L226 Difference]: Without dead ends: 116 [2020-10-14 23:59:13,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:59:13,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-14 23:59:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 54. [2020-10-14 23:59:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 23:59:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-10-14 23:59:13,720 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2020-10-14 23:59:13,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:13,720 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-10-14 23:59:13,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:59:13,720 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-10-14 23:59:13,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:59:13,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:13,721 INFO L422 BasicCegarLoop]: trace histogram [17, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:13,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2020-10-14 23:59:13,721 INFO L427 AbstractCegarLoop]: === Iteration 128 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:13,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:13,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1016768982, now seen corresponding path program 107 times [2020-10-14 23:59:13,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:13,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946124726] [2020-10-14 23:59:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:13,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:14,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:14,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:59:14,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:14,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 539 [2020-10-14 23:59:14,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:14,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:14,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:59:14,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:14,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:59:14,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:14,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:14,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:14,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:14,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:14,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:14,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:14,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:14,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:14,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:14,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:14,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:14,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:14,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946124726] [2020-10-14 23:59:14,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:14,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:59:14,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934012312] [2020-10-14 23:59:14,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:59:14,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:14,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:59:14,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=504, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:59:14,799 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 24 states. [2020-10-14 23:59:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:16,019 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2020-10-14 23:59:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:59:16,020 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-14 23:59:16,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:16,021 INFO L225 Difference]: With dead ends: 126 [2020-10-14 23:59:16,021 INFO L226 Difference]: Without dead ends: 121 [2020-10-14 23:59:16,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:59:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-14 23:59:16,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 54. [2020-10-14 23:59:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 23:59:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-10-14 23:59:16,100 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2020-10-14 23:59:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:16,101 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-10-14 23:59:16,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:59:16,101 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-10-14 23:59:16,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:59:16,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:16,101 INFO L422 BasicCegarLoop]: trace histogram [18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:16,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2020-10-14 23:59:16,102 INFO L427 AbstractCegarLoop]: === Iteration 129 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:16,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:16,102 INFO L82 PathProgramCache]: Analyzing trace with hash 78143031, now seen corresponding path program 108 times [2020-10-14 23:59:16,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:16,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714582448] [2020-10-14 23:59:16,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:16,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:16,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:16,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:59:16,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:16,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-14 23:59:16,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:16,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:16,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:59:16,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:16,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:59:16,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:17,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:17,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:17,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:17,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:17,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:17,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:17,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:17,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:17,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:17,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:17,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:17,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:17,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714582448] [2020-10-14 23:59:17,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:17,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:59:17,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620008921] [2020-10-14 23:59:17,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:59:17,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:17,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:59:17,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:59:17,130 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 24 states. [2020-10-14 23:59:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:18,217 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2020-10-14 23:59:18,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:59:18,218 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-14 23:59:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:18,219 INFO L225 Difference]: With dead ends: 130 [2020-10-14 23:59:18,219 INFO L226 Difference]: Without dead ends: 125 [2020-10-14 23:59:18,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:59:18,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-14 23:59:18,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 54. [2020-10-14 23:59:18,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 23:59:18,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-10-14 23:59:18,317 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2020-10-14 23:59:18,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:18,318 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-10-14 23:59:18,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:59:18,318 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-10-14 23:59:18,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:59:18,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:18,318 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:18,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2020-10-14 23:59:18,319 INFO L427 AbstractCegarLoop]: === Iteration 130 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:18,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:18,319 INFO L82 PathProgramCache]: Analyzing trace with hash -506324554, now seen corresponding path program 109 times [2020-10-14 23:59:18,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:18,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122452788] [2020-10-14 23:59:18,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:18,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:19,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:19,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:59:19,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:19,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 845 [2020-10-14 23:59:19,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:19,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:59:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:59:19,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:19,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:19,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:19,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:19,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:19,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:19,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:19,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:19,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:19,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:19,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:19,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:19,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:19,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122452788] [2020-10-14 23:59:19,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:19,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:59:19,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235665142] [2020-10-14 23:59:19,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:59:19,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:19,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:59:19,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:59:19,710 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 24 states. [2020-10-14 23:59:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:20,768 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2020-10-14 23:59:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:59:20,769 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-14 23:59:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:20,770 INFO L225 Difference]: With dead ends: 133 [2020-10-14 23:59:20,770 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 23:59:20,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:59:20,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 23:59:20,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 54. [2020-10-14 23:59:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 23:59:20,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-10-14 23:59:20,851 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2020-10-14 23:59:20,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:20,852 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-10-14 23:59:20,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:59:20,852 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-10-14 23:59:20,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:59:20,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:20,852 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:20,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2020-10-14 23:59:20,852 INFO L427 AbstractCegarLoop]: === Iteration 131 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:20,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1691578967, now seen corresponding path program 20 times [2020-10-14 23:59:20,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:20,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848018771] [2020-10-14 23:59:20,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:20,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:21,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:21,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:59:21,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:21,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-10-14 23:59:21,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:21,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:21,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:59:21,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:21,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:59:21,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:22,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:22,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:22,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:22,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:22,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:22,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:22,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:22,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:22,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:22,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:22,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:22,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:22,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848018771] [2020-10-14 23:59:22,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:22,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:59:22,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554303625] [2020-10-14 23:59:22,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:59:22,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:22,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:59:22,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:59:22,137 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 24 states. [2020-10-14 23:59:23,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:23,181 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2020-10-14 23:59:23,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:59:23,182 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-14 23:59:23,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:23,182 INFO L225 Difference]: With dead ends: 138 [2020-10-14 23:59:23,183 INFO L226 Difference]: Without dead ends: 133 [2020-10-14 23:59:23,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:59:23,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-14 23:59:23,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 56. [2020-10-14 23:59:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 23:59:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2020-10-14 23:59:23,255 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 32 [2020-10-14 23:59:23,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:23,255 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2020-10-14 23:59:23,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:59:23,255 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2020-10-14 23:59:23,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:23,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:23,256 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:23,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2020-10-14 23:59:23,256 INFO L427 AbstractCegarLoop]: === Iteration 132 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:23,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:23,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1607769221, now seen corresponding path program 110 times [2020-10-14 23:59:23,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:23,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62492746] [2020-10-14 23:59:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:23,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:24,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:24,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:24,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:24,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 848 [2020-10-14 23:59:24,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:24,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:24,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:59:24,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:24,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:59:24,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:24,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:24,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:24,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:24,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:24,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:24,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:24,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:24,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:24,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:24,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:24,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:24,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:24,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62492746] [2020-10-14 23:59:24,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:24,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:59:24,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763156463] [2020-10-14 23:59:24,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:59:24,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:24,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:59:24,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:59:24,629 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 24 states. [2020-10-14 23:59:25,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:25,392 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-10-14 23:59:25,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:59:25,393 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2020-10-14 23:59:25,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:25,394 INFO L225 Difference]: With dead ends: 72 [2020-10-14 23:59:25,394 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 23:59:25,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:59:25,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 23:59:25,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-14 23:59:25,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 23:59:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-10-14 23:59:25,463 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 33 [2020-10-14 23:59:25,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:25,463 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-10-14 23:59:25,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:59:25,463 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-10-14 23:59:25,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:25,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:25,464 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:25,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2020-10-14 23:59:25,464 INFO L427 AbstractCegarLoop]: === Iteration 133 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:25,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:25,464 INFO L82 PathProgramCache]: Analyzing trace with hash 383541222, now seen corresponding path program 111 times [2020-10-14 23:59:25,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:25,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895040025] [2020-10-14 23:59:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:25,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:26,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:26,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:26,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:26,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-14 23:59:26,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:26,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:26,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:59:26,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:26,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:59:26,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:26,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:26,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:26,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:26,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:26,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:26,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:26,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:26,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:26,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:26,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:26,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:26,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:26,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895040025] [2020-10-14 23:59:26,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:26,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:59:26,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949559769] [2020-10-14 23:59:26,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:59:26,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:26,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:59:26,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:59:26,643 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 25 states. [2020-10-14 23:59:27,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:27,429 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-10-14 23:59:27,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:59:27,430 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-14 23:59:27,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:27,430 INFO L225 Difference]: With dead ends: 71 [2020-10-14 23:59:27,430 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 23:59:27,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:59:27,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 23:59:27,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2020-10-14 23:59:27,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:59:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-14 23:59:27,508 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 33 [2020-10-14 23:59:27,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:27,508 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-14 23:59:27,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:59:27,508 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-14 23:59:27,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:27,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:27,508 INFO L422 BasicCegarLoop]: trace histogram [12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:27,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2020-10-14 23:59:27,509 INFO L427 AbstractCegarLoop]: === Iteration 134 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:27,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:27,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1175333989, now seen corresponding path program 112 times [2020-10-14 23:59:27,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:27,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953072564] [2020-10-14 23:59:27,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:27,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:28,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:28,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:28,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:28,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-10-14 23:59:28,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:28,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:28,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:59:28,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:28,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:59:28,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:28,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:28,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:28,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:28,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:28,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:28,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:28,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:28,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:28,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:28,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:28,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:28,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:28,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953072564] [2020-10-14 23:59:28,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:28,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:59:28,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640852755] [2020-10-14 23:59:28,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:59:28,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:28,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:59:28,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:59:28,705 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 25 states. [2020-10-14 23:59:29,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:29,973 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2020-10-14 23:59:29,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 23:59:29,974 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-14 23:59:29,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:29,974 INFO L225 Difference]: With dead ends: 82 [2020-10-14 23:59:29,974 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 23:59:29,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=166, Invalid=1726, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 23:59:29,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 23:59:30,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-14 23:59:30,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:59:30,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-14 23:59:30,056 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 33 [2020-10-14 23:59:30,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:30,056 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-14 23:59:30,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:59:30,056 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-14 23:59:30,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:30,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:30,057 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:30,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2020-10-14 23:59:30,057 INFO L427 AbstractCegarLoop]: === Iteration 135 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:30,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:30,057 INFO L82 PathProgramCache]: Analyzing trace with hash -46050298, now seen corresponding path program 113 times [2020-10-14 23:59:30,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:30,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547979599] [2020-10-14 23:59:30,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:30,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:30,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:30,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:30,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:30,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 705 [2020-10-14 23:59:30,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:30,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:30,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:59:30,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:30,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:59:30,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:31,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:31,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:31,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:31,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:31,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:31,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:31,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:31,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:31,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:31,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:31,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:31,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:31,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547979599] [2020-10-14 23:59:31,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:31,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:59:31,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031118099] [2020-10-14 23:59:31,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:59:31,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:31,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:59:31,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:59:31,332 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 25 states. [2020-10-14 23:59:32,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:32,813 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2020-10-14 23:59:32,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 23:59:32,814 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-14 23:59:32,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:32,815 INFO L225 Difference]: With dead ends: 92 [2020-10-14 23:59:32,815 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 23:59:32,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=193, Invalid=2159, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 23:59:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 23:59:32,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2020-10-14 23:59:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:59:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-14 23:59:32,896 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 33 [2020-10-14 23:59:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:32,897 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-14 23:59:32,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:59:32,897 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-14 23:59:32,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:32,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:32,897 INFO L422 BasicCegarLoop]: trace histogram [14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:32,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2020-10-14 23:59:32,897 INFO L427 AbstractCegarLoop]: === Iteration 136 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:32,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:32,897 INFO L82 PathProgramCache]: Analyzing trace with hash 53097541, now seen corresponding path program 114 times [2020-10-14 23:59:32,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:32,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253583768] [2020-10-14 23:59:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:32,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:33,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:33,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:33,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:33,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-14 23:59:33,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:33,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:33,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:59:33,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:33,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:59:33,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:34,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:34,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:34,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:34,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:34,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:34,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:34,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:34,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:34,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:34,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:34,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:34,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:34,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253583768] [2020-10-14 23:59:34,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:34,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:59:34,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385881609] [2020-10-14 23:59:34,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:59:34,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:34,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:59:34,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:59:34,122 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 25 states. [2020-10-14 23:59:35,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:35,873 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2020-10-14 23:59:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 23:59:35,874 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-14 23:59:35,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:35,875 INFO L225 Difference]: With dead ends: 101 [2020-10-14 23:59:35,875 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 23:59:35,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=202, Invalid=2348, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 23:59:35,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 23:59:35,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2020-10-14 23:59:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:59:35,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-14 23:59:35,958 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 33 [2020-10-14 23:59:35,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:35,959 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-14 23:59:35,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:59:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-14 23:59:35,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:35,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:35,959 INFO L422 BasicCegarLoop]: trace histogram [15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:35,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2020-10-14 23:59:35,959 INFO L427 AbstractCegarLoop]: === Iteration 137 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:35,959 INFO L82 PathProgramCache]: Analyzing trace with hash -359346138, now seen corresponding path program 115 times [2020-10-14 23:59:35,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:35,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767558726] [2020-10-14 23:59:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:35,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:36,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:36,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:36,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:36,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 668 [2020-10-14 23:59:36,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:36,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:36,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:59:36,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:36,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:59:36,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:37,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:37,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:37,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:37,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:37,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:37,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:37,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:37,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:37,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:37,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:37,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:37,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:37,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767558726] [2020-10-14 23:59:37,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:37,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:59:37,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756116067] [2020-10-14 23:59:37,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:59:37,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:37,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:59:37,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:59:37,184 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 25 states. [2020-10-14 23:59:38,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:38,955 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2020-10-14 23:59:38,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 23:59:38,956 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-14 23:59:38,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:38,957 INFO L225 Difference]: With dead ends: 109 [2020-10-14 23:59:38,957 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 23:59:38,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=193, Invalid=2257, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 23:59:38,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 23:59:39,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 55. [2020-10-14 23:59:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:59:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-14 23:59:39,046 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 33 [2020-10-14 23:59:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:39,046 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-14 23:59:39,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:59:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-14 23:59:39,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:39,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:39,046 INFO L422 BasicCegarLoop]: trace histogram [16, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:39,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2020-10-14 23:59:39,047 INFO L427 AbstractCegarLoop]: === Iteration 138 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:39,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:39,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1567011877, now seen corresponding path program 116 times [2020-10-14 23:59:39,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:39,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584324969] [2020-10-14 23:59:39,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:39,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:39,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:39,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:39,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:39,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 678 [2020-10-14 23:59:39,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:39,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:39,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:59:39,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:39,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:59:39,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:40,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:40,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:40,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:40,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:40,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:40,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:40,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:40,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:40,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:40,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:40,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:40,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:40,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584324969] [2020-10-14 23:59:40,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:40,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:59:40,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174766520] [2020-10-14 23:59:40,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:59:40,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:40,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:59:40,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:59:40,298 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 25 states. [2020-10-14 23:59:41,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:41,959 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2020-10-14 23:59:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 23:59:41,960 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-14 23:59:41,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:41,961 INFO L225 Difference]: With dead ends: 116 [2020-10-14 23:59:41,961 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 23:59:41,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=166, Invalid=1904, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 23:59:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 23:59:42,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 55. [2020-10-14 23:59:42,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:59:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-14 23:59:42,132 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 33 [2020-10-14 23:59:42,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:42,132 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-14 23:59:42,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:59:42,132 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-14 23:59:42,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:42,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:42,133 INFO L422 BasicCegarLoop]: trace histogram [17, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:42,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2020-10-14 23:59:42,134 INFO L427 AbstractCegarLoop]: === Iteration 139 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:42,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:42,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1490605126, now seen corresponding path program 117 times [2020-10-14 23:59:42,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:42,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465044137] [2020-10-14 23:59:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:42,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:43,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:43,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:43,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:43,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1225 [2020-10-14 23:59:43,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:43,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:43,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:59:43,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:43,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:59:43,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:43,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:43,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:43,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:43,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:43,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:43,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:43,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:43,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:43,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:43,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:43,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:43,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:43,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465044137] [2020-10-14 23:59:43,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:43,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:59:43,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245626237] [2020-10-14 23:59:43,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:59:43,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:43,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:59:43,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:59:43,937 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 25 states. [2020-10-14 23:59:45,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:45,460 INFO L93 Difference]: Finished difference Result 122 states and 140 transitions. [2020-10-14 23:59:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 23:59:45,461 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-14 23:59:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:45,462 INFO L225 Difference]: With dead ends: 122 [2020-10-14 23:59:45,462 INFO L226 Difference]: Without dead ends: 117 [2020-10-14 23:59:45,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 23:59:45,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-14 23:59:45,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 55. [2020-10-14 23:59:45,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:59:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-14 23:59:45,546 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 33 [2020-10-14 23:59:45,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:45,546 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-14 23:59:45,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:59:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-14 23:59:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:45,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:45,547 INFO L422 BasicCegarLoop]: trace histogram [18, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:45,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2020-10-14 23:59:45,547 INFO L427 AbstractCegarLoop]: === Iteration 140 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:45,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:45,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1836995579, now seen corresponding path program 118 times [2020-10-14 23:59:45,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:45,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983989158] [2020-10-14 23:59:45,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:45,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:46,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:46,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:46,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:46,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-14 23:59:46,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:46,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:46,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:59:46,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:46,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:59:46,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:46,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:46,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:46,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:46,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:46,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:46,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:46,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:46,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:46,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:46,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:46,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:46,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:46,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983989158] [2020-10-14 23:59:46,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:46,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:59:46,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050676643] [2020-10-14 23:59:46,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:59:46,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:46,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:59:46,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:59:46,806 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 25 states. [2020-10-14 23:59:48,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:48,131 INFO L93 Difference]: Finished difference Result 127 states and 146 transitions. [2020-10-14 23:59:48,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:59:48,132 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-14 23:59:48,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:48,133 INFO L225 Difference]: With dead ends: 127 [2020-10-14 23:59:48,133 INFO L226 Difference]: Without dead ends: 122 [2020-10-14 23:59:48,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:59:48,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-14 23:59:48,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 55. [2020-10-14 23:59:48,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:59:48,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-14 23:59:48,219 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 33 [2020-10-14 23:59:48,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:48,220 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-14 23:59:48,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:59:48,220 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-14 23:59:48,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:48,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:48,220 INFO L422 BasicCegarLoop]: trace histogram [19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:48,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2020-10-14 23:59:48,220 INFO L427 AbstractCegarLoop]: === Iteration 141 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:48,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:48,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1519345766, now seen corresponding path program 119 times [2020-10-14 23:59:48,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:48,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16687572] [2020-10-14 23:59:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:48,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:48,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:48,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:48,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:48,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 726 [2020-10-14 23:59:48,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:48,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:48,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:59:48,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:48,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:59:48,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:49,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:49,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:49,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:49,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:49,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:49,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:49,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:49,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:49,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:49,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16687572] [2020-10-14 23:59:49,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:49,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:59:49,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438999827] [2020-10-14 23:59:49,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:59:49,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:49,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:59:49,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:59:49,526 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 25 states. [2020-10-14 23:59:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:50,758 INFO L93 Difference]: Finished difference Result 131 states and 151 transitions. [2020-10-14 23:59:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:59:50,760 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-14 23:59:50,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:50,760 INFO L225 Difference]: With dead ends: 131 [2020-10-14 23:59:50,761 INFO L226 Difference]: Without dead ends: 126 [2020-10-14 23:59:50,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:59:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-14 23:59:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 55. [2020-10-14 23:59:50,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:59:50,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-14 23:59:50,848 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 33 [2020-10-14 23:59:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:50,849 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-14 23:59:50,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:59:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-14 23:59:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:50,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:50,849 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:50,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2020-10-14 23:59:50,850 INFO L427 AbstractCegarLoop]: === Iteration 142 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:50,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:50,850 INFO L82 PathProgramCache]: Analyzing trace with hash 934878181, now seen corresponding path program 120 times [2020-10-14 23:59:50,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:50,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315042447] [2020-10-14 23:59:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:50,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:51,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:51,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:51,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:51,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 772 [2020-10-14 23:59:51,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:51,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:51,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:59:51,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:51,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:59:51,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:52,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:52,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:52,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:52,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:52,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:52,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:52,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:52,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:52,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:52,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:52,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:52,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:52,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315042447] [2020-10-14 23:59:52,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:52,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:59:52,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99300481] [2020-10-14 23:59:52,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:59:52,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:52,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:59:52,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:59:52,192 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 25 states. [2020-10-14 23:59:53,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:53,346 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2020-10-14 23:59:53,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:59:53,347 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-14 23:59:53,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:53,348 INFO L225 Difference]: With dead ends: 134 [2020-10-14 23:59:53,348 INFO L226 Difference]: Without dead ends: 129 [2020-10-14 23:59:53,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=694, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:59:53,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-14 23:59:53,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 55. [2020-10-14 23:59:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:59:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-10-14 23:59:53,434 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 33 [2020-10-14 23:59:53,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:53,434 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-10-14 23:59:53,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:59:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-10-14 23:59:53,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:53,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:53,434 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:53,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2020-10-14 23:59:53,434 INFO L427 AbstractCegarLoop]: === Iteration 143 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:53,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:53,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1162185594, now seen corresponding path program 21 times [2020-10-14 23:59:53,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:53,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465776686] [2020-10-14 23:59:53,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:53,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:54,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:54,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:54,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:54,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 792 [2020-10-14 23:59:54,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:54,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:54,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:59:54,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:54,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:59:54,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:54,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:54,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:54,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:54,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:54,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:54,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:54,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:54,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:54,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:54,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:54,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:54,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:54,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465776686] [2020-10-14 23:59:54,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:54,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:59:54,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068974294] [2020-10-14 23:59:54,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:59:54,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:54,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:59:54,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:59:54,777 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 25 states. [2020-10-14 23:59:55,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:55,885 INFO L93 Difference]: Finished difference Result 139 states and 162 transitions. [2020-10-14 23:59:55,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:59:55,886 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-14 23:59:55,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:55,887 INFO L225 Difference]: With dead ends: 139 [2020-10-14 23:59:55,887 INFO L226 Difference]: Without dead ends: 134 [2020-10-14 23:59:55,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:59:55,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-14 23:59:55,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 57. [2020-10-14 23:59:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 23:59:55,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2020-10-14 23:59:55,979 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 33 [2020-10-14 23:59:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:55,979 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2020-10-14 23:59:55,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:59:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2020-10-14 23:59:55,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:59:55,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:55,980 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:55,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2020-10-14 23:59:55,980 INFO L427 AbstractCegarLoop]: === Iteration 144 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:55,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:55,980 INFO L82 PathProgramCache]: Analyzing trace with hash -959586250, now seen corresponding path program 121 times [2020-10-14 23:59:55,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:55,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285844025] [2020-10-14 23:59:55,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:56,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:56,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:56,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:59:56,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:56,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 699 [2020-10-14 23:59:56,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:56,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:56,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:59:56,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:56,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 23:59:56,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:57,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:57,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:57,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:57,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:57,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:57,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:57,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:57,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:57,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:57,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:57,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:57,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:57,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285844025] [2020-10-14 23:59:57,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:57,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:59:57,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050501131] [2020-10-14 23:59:57,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:59:57,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:57,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:59:57,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:59:57,049 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand 17 states. [2020-10-14 23:59:57,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:57,579 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-10-14 23:59:57,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:59:57,580 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-14 23:59:57,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:57,580 INFO L225 Difference]: With dead ends: 73 [2020-10-14 23:59:57,581 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 23:59:57,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:59:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 23:59:57,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2020-10-14 23:59:57,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 23:59:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-10-14 23:59:57,683 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 34 [2020-10-14 23:59:57,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:57,683 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-10-14 23:59:57,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:59:57,684 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-10-14 23:59:57,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:59:57,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:57,684 INFO L422 BasicCegarLoop]: trace histogram [12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:57,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2020-10-14 23:59:57,684 INFO L427 AbstractCegarLoop]: === Iteration 145 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:57,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:57,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2111153047, now seen corresponding path program 122 times [2020-10-14 23:59:57,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:57,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435606541] [2020-10-14 23:59:57,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:57,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:58,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:58,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:59:58,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:58,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-14 23:59:58,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:58,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:58,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 23:59:58,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:58,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:59:58,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:58,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:58,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:58,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:58,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:58,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:58,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:58,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:58,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:58,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:58,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:58,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:58,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:58,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435606541] [2020-10-14 23:59:58,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:58,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:59:58,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088887170] [2020-10-14 23:59:58,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:59:58,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:58,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:59:58,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:59:58,913 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 26 states. [2020-10-15 00:00:00,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:00,370 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2020-10-15 00:00:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 00:00:00,371 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-15 00:00:00,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:00,372 INFO L225 Difference]: With dead ends: 87 [2020-10-15 00:00:00,372 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 00:00:00,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=181, Invalid=1981, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 00:00:00,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 00:00:00,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 58. [2020-10-15 00:00:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 00:00:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-10-15 00:00:00,478 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 34 [2020-10-15 00:00:00,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:00,478 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-10-15 00:00:00,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:00:00,478 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-10-15 00:00:00,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:00:00,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:00,478 INFO L422 BasicCegarLoop]: trace histogram [13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:00,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2020-10-15 00:00:00,479 INFO L427 AbstractCegarLoop]: === Iteration 146 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:00,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:00,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1392021482, now seen corresponding path program 123 times [2020-10-15 00:00:00,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:00,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743265080] [2020-10-15 00:00:00,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:00,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:01,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:01,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:00:01,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:01,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 584 [2020-10-15 00:00:01,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:01,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:01,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:00:01,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:01,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:00:01,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:01,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:01,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:01,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:01,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:01,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:01,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:01,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:01,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:01,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:01,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:01,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:01,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:01,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743265080] [2020-10-15 00:00:01,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:01,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:00:01,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18455673] [2020-10-15 00:00:01,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:00:01,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:01,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:00:01,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:00:01,702 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 26 states. [2020-10-15 00:00:03,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:03,592 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2020-10-15 00:00:03,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 00:00:03,593 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-15 00:00:03,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:03,594 INFO L225 Difference]: With dead ends: 98 [2020-10-15 00:00:03,594 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 00:00:03,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=214, Invalid=2542, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:00:03,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 00:00:03,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-15 00:00:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 00:00:03,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-10-15 00:00:03,701 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 34 [2020-10-15 00:00:03,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:03,701 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-10-15 00:00:03,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:00:03,701 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-10-15 00:00:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:00:03,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:03,701 INFO L422 BasicCegarLoop]: trace histogram [14, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:03,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2020-10-15 00:00:03,701 INFO L427 AbstractCegarLoop]: === Iteration 147 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:03,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:03,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1681561527, now seen corresponding path program 124 times [2020-10-15 00:00:03,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:03,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75030548] [2020-10-15 00:00:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:03,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:04,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:04,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:00:04,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:04,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-10-15 00:00:04,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:04,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:04,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:00:04,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:04,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:00:04,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:04,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:04,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:04,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:04,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:04,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:04,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:04,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:04,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:04,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:04,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:04,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:04,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:04,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75030548] [2020-10-15 00:00:04,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:04,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:00:04,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910177875] [2020-10-15 00:00:04,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:00:04,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:04,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:00:04,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:00:04,948 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 26 states. [2020-10-15 00:00:07,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:07,072 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2020-10-15 00:00:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 00:00:07,073 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-15 00:00:07,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:07,073 INFO L225 Difference]: With dead ends: 108 [2020-10-15 00:00:07,074 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 00:00:07,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=229, Invalid=2851, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 00:00:07,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 00:00:07,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 58. [2020-10-15 00:00:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 00:00:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-10-15 00:00:07,177 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 34 [2020-10-15 00:00:07,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:07,178 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-10-15 00:00:07,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:00:07,178 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-10-15 00:00:07,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:00:07,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:07,178 INFO L422 BasicCegarLoop]: trace histogram [15, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:07,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2020-10-15 00:00:07,178 INFO L427 AbstractCegarLoop]: === Iteration 148 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:07,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:07,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1780709366, now seen corresponding path program 125 times [2020-10-15 00:00:07,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:07,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820879203] [2020-10-15 00:00:07,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:07,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:07,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:07,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:00:07,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:07,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-15 00:00:07,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:07,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:07,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:00:07,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:07,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:00:07,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:08,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:08,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:08,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:08,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:08,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:08,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:08,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:08,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:08,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:08,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:08,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:08,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:08,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820879203] [2020-10-15 00:00:08,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:08,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:00:08,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143060104] [2020-10-15 00:00:08,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:00:08,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:08,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:00:08,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:00:08,445 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 26 states. [2020-10-15 00:00:10,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:10,665 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2020-10-15 00:00:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 00:00:10,666 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-15 00:00:10,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:10,666 INFO L225 Difference]: With dead ends: 117 [2020-10-15 00:00:10,666 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 00:00:10,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=226, Invalid=2854, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 00:00:10,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 00:00:10,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 58. [2020-10-15 00:00:10,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 00:00:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-10-15 00:00:10,777 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 34 [2020-10-15 00:00:10,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:10,777 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-10-15 00:00:10,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:00:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-10-15 00:00:10,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:00:10,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:10,778 INFO L422 BasicCegarLoop]: trace histogram [16, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:10,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2020-10-15 00:00:10,778 INFO L427 AbstractCegarLoop]: === Iteration 149 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:10,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:10,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1368265687, now seen corresponding path program 126 times [2020-10-15 00:00:10,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:10,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253667208] [2020-10-15 00:00:10,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:10,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:11,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:11,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:00:11,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:11,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 578 [2020-10-15 00:00:11,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:11,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:11,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:00:11,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:11,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:00:11,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:11,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:11,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:11,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:11,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:11,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:11,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:11,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:11,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:11,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:11,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:11,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:11,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:11,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253667208] [2020-10-15 00:00:11,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:11,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:00:11,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832308899] [2020-10-15 00:00:11,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:00:11,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:11,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:00:11,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=595, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:00:11,988 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 26 states. [2020-10-15 00:00:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:14,136 INFO L93 Difference]: Finished difference Result 125 states and 143 transitions. [2020-10-15 00:00:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 00:00:14,137 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-15 00:00:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:14,137 INFO L225 Difference]: With dead ends: 125 [2020-10-15 00:00:14,138 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 00:00:14,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=205, Invalid=2551, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:00:14,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 00:00:14,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 58. [2020-10-15 00:00:14,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 00:00:14,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-10-15 00:00:14,251 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 34 [2020-10-15 00:00:14,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:14,251 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-10-15 00:00:14,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:00:14,251 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-10-15 00:00:14,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:00:14,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:14,252 INFO L422 BasicCegarLoop]: trace histogram [17, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:14,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2020-10-15 00:00:14,252 INFO L427 AbstractCegarLoop]: === Iteration 150 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:14,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:14,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1000343594, now seen corresponding path program 127 times [2020-10-15 00:00:14,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:14,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706621796] [2020-10-15 00:00:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:14,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:15,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:15,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:00:15,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:15,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 765 [2020-10-15 00:00:15,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:15,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:15,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:00:15,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:15,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:00:15,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:15,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:15,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:15,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:15,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:15,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:15,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:15,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:15,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:15,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:15,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:15,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:15,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:15,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706621796] [2020-10-15 00:00:15,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:15,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:00:15,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539973091] [2020-10-15 00:00:15,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:00:15,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:15,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:00:15,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:00:15,651 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 26 states. [2020-10-15 00:00:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:17,672 INFO L93 Difference]: Finished difference Result 132 states and 151 transitions. [2020-10-15 00:00:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 00:00:17,672 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-15 00:00:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:17,673 INFO L225 Difference]: With dead ends: 132 [2020-10-15 00:00:17,673 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 00:00:17,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=168, Invalid=1994, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 00:00:17,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 00:00:17,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 58. [2020-10-15 00:00:17,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 00:00:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-10-15 00:00:17,837 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 34 [2020-10-15 00:00:17,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:17,837 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-10-15 00:00:17,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:00:17,838 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-10-15 00:00:17,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:00:17,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:17,838 INFO L422 BasicCegarLoop]: trace histogram [18, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:17,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2020-10-15 00:00:17,838 INFO L427 AbstractCegarLoop]: === Iteration 151 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:17,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:17,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1076750345, now seen corresponding path program 128 times [2020-10-15 00:00:17,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:17,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293900937] [2020-10-15 00:00:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:17,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:18,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:18,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:00:18,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:18,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 770 [2020-10-15 00:00:18,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:18,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:18,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:00:18,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:18,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:00:18,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:19,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:19,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:19,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:19,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:19,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:19,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:19,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:19,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:19,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:19,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:19,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:19,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:19,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293900937] [2020-10-15 00:00:19,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:19,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:00:19,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411743880] [2020-10-15 00:00:19,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:00:19,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:19,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:00:19,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:00:19,243 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 26 states. [2020-10-15 00:00:21,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:21,041 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2020-10-15 00:00:21,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 00:00:21,041 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-15 00:00:21,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:21,042 INFO L225 Difference]: With dead ends: 138 [2020-10-15 00:00:21,042 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 00:00:21,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:00:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 00:00:21,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 58. [2020-10-15 00:00:21,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 00:00:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-10-15 00:00:21,161 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 34 [2020-10-15 00:00:21,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:21,161 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-10-15 00:00:21,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:00:21,161 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-10-15 00:00:21,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:00:21,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:21,162 INFO L422 BasicCegarLoop]: trace histogram [19, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:21,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2020-10-15 00:00:21,162 INFO L427 AbstractCegarLoop]: === Iteration 152 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:21,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:21,162 INFO L82 PathProgramCache]: Analyzing trace with hash -109383754, now seen corresponding path program 129 times [2020-10-15 00:00:21,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:21,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488918570] [2020-10-15 00:00:21,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:21,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:21,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:21,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:00:21,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:21,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-10-15 00:00:21,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:21,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:21,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:00:21,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:21,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:00:21,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:22,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:22,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:22,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:22,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:22,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:22,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:22,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:22,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:22,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:22,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:22,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:22,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:22,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488918570] [2020-10-15 00:00:22,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:22,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:00:22,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767071146] [2020-10-15 00:00:22,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:00:22,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:22,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:00:22,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=598, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:00:22,379 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 26 states. [2020-10-15 00:00:24,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:24,026 INFO L93 Difference]: Finished difference Result 143 states and 164 transitions. [2020-10-15 00:00:24,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 00:00:24,027 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-15 00:00:24,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:24,028 INFO L225 Difference]: With dead ends: 143 [2020-10-15 00:00:24,028 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 00:00:24,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:00:24,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 00:00:24,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 58. [2020-10-15 00:00:24,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 00:00:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-10-15 00:00:24,142 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 34 [2020-10-15 00:00:24,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:24,142 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-10-15 00:00:24,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:00:24,142 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-10-15 00:00:24,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:00:24,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:24,142 INFO L422 BasicCegarLoop]: trace histogram [20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:24,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2020-10-15 00:00:24,142 INFO L427 AbstractCegarLoop]: === Iteration 153 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:24,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:24,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1048009705, now seen corresponding path program 130 times [2020-10-15 00:00:24,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:24,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872987297] [2020-10-15 00:00:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:24,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:24,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:24,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:00:24,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:24,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 770 [2020-10-15 00:00:24,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:24,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:24,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:00:24,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:24,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:00:24,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:25,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:25,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:25,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:25,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:25,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:25,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:25,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:25,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:25,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:25,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:25,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:25,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:25,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872987297] [2020-10-15 00:00:25,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:25,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:00:25,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432701931] [2020-10-15 00:00:25,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:00:25,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:25,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:00:25,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:00:25,562 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 26 states.