/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/loop-acceleration/array_2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:44:11,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:44:11,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:44:11,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:44:11,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:44:11,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:44:11,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:44:11,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:44:11,495 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:44:11,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:44:11,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:44:11,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:44:11,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:44:11,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:44:11,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:44:11,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:44:11,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:44:11,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:44:11,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:44:11,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:44:11,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:44:11,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:44:11,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:44:11,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:44:11,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:44:11,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:44:11,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:44:11,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:44:11,536 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:44:11,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:44:11,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:44:11,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:44:11,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:44:11,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:44:11,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:44:11,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:44:11,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:44:11,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:44:11,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:44:11,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:44:11,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:44:11,547 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 23:44:11,590 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:44:11,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:44:11,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:44:11,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:44:11,592 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:44:11,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:44:11,593 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:44:11,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:44:11,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:44:11,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:44:11,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:44:11,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:44:11,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:44:11,595 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:44:11,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:44:11,595 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:44:11,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:44:11,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:44:11,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:44:11,596 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:44:11,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:44:11,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:44:11,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:44:11,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:44:11,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:44:11,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:44:11,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:44:11,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:44:11,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:44:11,598 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 23:44:11,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:44:11,890 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:44:11,894 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:44:11,895 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:44:11,896 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:44:11,896 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2.i [2020-10-14 23:44:11,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ace29cf2c/779e8b041ed74a028d19863de316d126/FLAG0e2af34cc [2020-10-14 23:44:12,410 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:44:12,410 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_2-2.i [2020-10-14 23:44:12,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ace29cf2c/779e8b041ed74a028d19863de316d126/FLAG0e2af34cc [2020-10-14 23:44:12,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ace29cf2c/779e8b041ed74a028d19863de316d126 [2020-10-14 23:44:12,860 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:44:12,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:44:12,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:44:12,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:44:12,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:44:12,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:44:12" (1/1) ... [2020-10-14 23:44:12,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5adf6174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:12, skipping insertion in model container [2020-10-14 23:44:12,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:44:12" (1/1) ... [2020-10-14 23:44:12,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:44:12,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:44:13,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:44:13,060 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:44:13,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:44:13,096 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:44:13,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:13 WrapperNode [2020-10-14 23:44:13,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:44:13,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:44:13,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:44:13,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:44:13,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:13" (1/1) ... [2020-10-14 23:44:13,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:13" (1/1) ... [2020-10-14 23:44:13,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:13" (1/1) ... [2020-10-14 23:44:13,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:13" (1/1) ... [2020-10-14 23:44:13,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:13" (1/1) ... [2020-10-14 23:44:13,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:13" (1/1) ... [2020-10-14 23:44:13,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:13" (1/1) ... [2020-10-14 23:44:13,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:44:13,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:44:13,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:44:13,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:44:13,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:13" (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 23:44:13,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:44:13,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:44:13,277 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:44:13,277 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:44:13,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:44:13,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:44:13,278 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:44:13,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 23:44:13,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 23:44:13,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 23:44:13,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:44:13,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:44:13,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:44:13,483 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:44:13,483 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 23:44:13,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:44:13 BoogieIcfgContainer [2020-10-14 23:44:13,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:44:13,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:44:13,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:44:13,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:44:13,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:44:12" (1/3) ... [2020-10-14 23:44:13,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3edd753e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:44:13, skipping insertion in model container [2020-10-14 23:44:13,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:13" (2/3) ... [2020-10-14 23:44:13,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3edd753e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:44:13, skipping insertion in model container [2020-10-14 23:44:13,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:44:13" (3/3) ... [2020-10-14 23:44:13,496 INFO L109 eAbstractionObserver]: Analyzing ICFG array_2-2.i [2020-10-14 23:44:13,511 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:44:13,521 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:44:13,537 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:44:13,567 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:44:13,567 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:44:13,567 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:44:13,567 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:44:13,568 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:44:13,568 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:44:13,568 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:44:13,568 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:44:13,588 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-14 23:44:13,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 23:44:13,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:13,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:13,596 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:13,602 INFO L82 PathProgramCache]: Analyzing trace with hash -267856937, now seen corresponding path program 1 times [2020-10-14 23:44:13,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:13,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659233693] [2020-10-14 23:44:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:13,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:13,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:13,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 23:44:13,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:13,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-14 23:44:13,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:13,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:13,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:13,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:44:13,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:13,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:44:13,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:13,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:13,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:13,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:13,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:13,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 23:44:13,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:13,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:13,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:13,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:13,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:13,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:13,932 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 23:44:13,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659233693] [2020-10-14 23:44:13,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:44:13,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 23:44:13,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105268052] [2020-10-14 23:44:13,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 23:44:13,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:13,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 23:44:13,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:44:13,962 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-10-14 23:44:14,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:14,028 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-14 23:44:14,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 23:44:14,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-14 23:44:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:14,039 INFO L225 Difference]: With dead ends: 34 [2020-10-14 23:44:14,039 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 23:44:14,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:44:14,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 23:44:14,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 23:44:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 23:44:14,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-14 23:44:14,082 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-14 23:44:14,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:14,082 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-14 23:44:14,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 23:44:14,083 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-14 23:44:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 23:44:14,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:14,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:14,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:44:14,085 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:14,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:14,086 INFO L82 PathProgramCache]: Analyzing trace with hash -439631843, now seen corresponding path program 1 times [2020-10-14 23:44:14,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:14,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931057021] [2020-10-14 23:44:14,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:14,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:14,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:14,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 23:44:14,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:14,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-14 23:44:14,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:14,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:14,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:44:14,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:14,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:44:14,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:14,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:14,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:14,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:14,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:14,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:14,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 23:44:14,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:14,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:14,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:14,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:14,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:14,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:14,231 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 23:44:14,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931057021] [2020-10-14 23:44:14,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:44:14,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 23:44:14,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232568411] [2020-10-14 23:44:14,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:44:14,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:14,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:44:14,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:44:14,235 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2020-10-14 23:44:14,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:14,273 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-14 23:44:14,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:44:14,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-14 23:44:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:14,275 INFO L225 Difference]: With dead ends: 22 [2020-10-14 23:44:14,276 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 23:44:14,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:44:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 23:44:14,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-14 23:44:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 23:44:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-14 23:44:14,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-10-14 23:44:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:14,283 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-14 23:44:14,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:44:14,283 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-14 23:44:14,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 23:44:14,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:14,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:14,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:44:14,284 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:14,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:14,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1874839487, now seen corresponding path program 1 times [2020-10-14 23:44:14,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:14,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337044942] [2020-10-14 23:44:14,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:14,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:14,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:14,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 23:44:14,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:14,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-14 23:44:14,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:14,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:14,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:44:14,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:14,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 23:44:14,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:14,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:14,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:14,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:14,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:14,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:14,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 23:44:14,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:14,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:14,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:14,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:14,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:14,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:14,511 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 23:44:14,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337044942] [2020-10-14 23:44:14,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:14,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:44:14,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373572817] [2020-10-14 23:44:14,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:44:14,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:14,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:44:14,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:44:14,515 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-10-14 23:44:14,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:14,572 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-14 23:44:14,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:44:14,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-14 23:44:14,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:14,573 INFO L225 Difference]: With dead ends: 24 [2020-10-14 23:44:14,574 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 23:44:14,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:44:14,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 23:44:14,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-14 23:44:14,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 23:44:14,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-14 23:44:14,583 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-14 23:44:14,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:14,583 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-14 23:44:14,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:44:14,584 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-14 23:44:14,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:44:14,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:14,585 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:14,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:44:14,586 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:14,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:14,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1288728289, now seen corresponding path program 2 times [2020-10-14 23:44:14,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:14,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574789725] [2020-10-14 23:44:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:14,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:14,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:14,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:44:14,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:14,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-14 23:44:14,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:14,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:14,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:44:14,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:14,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:44:14,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:14,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:14,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:14,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:14,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:14,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:14,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:14,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:14,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:14,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:14,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:14,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:14,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:44:14,851 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 23:44:14,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574789725] [2020-10-14 23:44:14,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:14,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:44:14,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294286551] [2020-10-14 23:44:14,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:44:14,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:14,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:44:14,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:44:14,857 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-10-14 23:44:14,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:14,917 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-14 23:44:14,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:44:14,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-14 23:44:14,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:14,918 INFO L225 Difference]: With dead ends: 26 [2020-10-14 23:44:14,918 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 23:44:14,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:44:14,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 23:44:14,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-14 23:44:14,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 23:44:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-14 23:44:14,934 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-10-14 23:44:14,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:14,935 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-14 23:44:14,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:44:14,935 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-14 23:44:14,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:44:14,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:14,936 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:14,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:44:14,937 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:14,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:14,938 INFO L82 PathProgramCache]: Analyzing trace with hash 676582787, now seen corresponding path program 3 times [2020-10-14 23:44:14,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:14,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330622933] [2020-10-14 23:44:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:14,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:15,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:15,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:44:15,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:15,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-14 23:44:15,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:15,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:15,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:44:15,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:15,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:44:15,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:15,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:15,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:15,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:15,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:15,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:15,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:15,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:15,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:15,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:15,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:15,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:15,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:15,078 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 23:44:15,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330622933] [2020-10-14 23:44:15,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:15,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:44:15,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035656267] [2020-10-14 23:44:15,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:44:15,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:15,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:44:15,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:44:15,081 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-10-14 23:44:15,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:15,138 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-14 23:44:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:44:15,139 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-14 23:44:15,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:15,140 INFO L225 Difference]: With dead ends: 28 [2020-10-14 23:44:15,140 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 23:44:15,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:44:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 23:44:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-14 23:44:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 23:44:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-14 23:44:15,147 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-14 23:44:15,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:15,147 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-14 23:44:15,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:44:15,148 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-14 23:44:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:44:15,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:15,149 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:15,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:44:15,149 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:15,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:15,150 INFO L82 PathProgramCache]: Analyzing trace with hash 815274917, now seen corresponding path program 4 times [2020-10-14 23:44:15,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:15,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408700436] [2020-10-14 23:44:15,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:15,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:15,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:15,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:44:15,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:15,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-14 23:44:15,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:15,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:15,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:44:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:15,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:44:15,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:15,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:15,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:15,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:15,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:15,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:15,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:15,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:15,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:15,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:15,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:15,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:15,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:15,314 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 23:44:15,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408700436] [2020-10-14 23:44:15,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:15,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:44:15,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219572988] [2020-10-14 23:44:15,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:44:15,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:15,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:44:15,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:44:15,317 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-10-14 23:44:15,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:15,373 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-14 23:44:15,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:44:15,374 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-14 23:44:15,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:15,374 INFO L225 Difference]: With dead ends: 30 [2020-10-14 23:44:15,375 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 23:44:15,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:44:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 23:44:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-14 23:44:15,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 23:44:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-14 23:44:15,380 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-14 23:44:15,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:15,381 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-14 23:44:15,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:44:15,381 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-14 23:44:15,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:44:15,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:15,382 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:15,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:44:15,383 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:15,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:15,383 INFO L82 PathProgramCache]: Analyzing trace with hash 954425671, now seen corresponding path program 5 times [2020-10-14 23:44:15,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:15,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334069826] [2020-10-14 23:44:15,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:15,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:15,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:15,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:44:15,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:15,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-14 23:44:15,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:15,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:15,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:44:15,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:15,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:44:15,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:15,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:15,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:15,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:15,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:15,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:15,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:15,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:15,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:15,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:15,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:15,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:15,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:15,598 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 23:44:15,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334069826] [2020-10-14 23:44:15,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:15,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:44:15,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817333111] [2020-10-14 23:44:15,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:44:15,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:15,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:44:15,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:44:15,600 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-10-14 23:44:15,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:15,658 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-14 23:44:15,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:44:15,659 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-14 23:44:15,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:15,660 INFO L225 Difference]: With dead ends: 32 [2020-10-14 23:44:15,660 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 23:44:15,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:44:15,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 23:44:15,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-14 23:44:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 23:44:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-14 23:44:15,666 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-14 23:44:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:15,667 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-14 23:44:15,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:44:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-14 23:44:15,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:44:15,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:15,668 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:15,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:44:15,668 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:15,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:15,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1534314089, now seen corresponding path program 6 times [2020-10-14 23:44:15,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:15,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930639378] [2020-10-14 23:44:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:15,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:15,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:15,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:44:15,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:15,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-14 23:44:15,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:15,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:15,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:44:15,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:15,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:44:15,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:15,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:15,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:15,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:15,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:15,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:15,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:15,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:15,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:15,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:15,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:15,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:15,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:44:15,908 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 23:44:15,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930639378] [2020-10-14 23:44:15,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:15,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:44:15,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258904993] [2020-10-14 23:44:15,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:44:15,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:15,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:44:15,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:44:15,912 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-10-14 23:44:15,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:15,982 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-14 23:44:15,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:44:15,983 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-14 23:44:15,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:15,984 INFO L225 Difference]: With dead ends: 34 [2020-10-14 23:44:15,984 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 23:44:15,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:44:15,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 23:44:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-14 23:44:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 23:44:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-14 23:44:15,989 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-14 23:44:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:15,990 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-14 23:44:15,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:44:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-14 23:44:15,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:44:15,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:15,991 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:15,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:44:15,991 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:15,991 INFO L82 PathProgramCache]: Analyzing trace with hash 461335307, now seen corresponding path program 7 times [2020-10-14 23:44:15,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:15,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115710094] [2020-10-14 23:44:15,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:16,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:16,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:16,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:44:16,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:16,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-14 23:44:16,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:16,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:16,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:44:16,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:16,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:44:16,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:16,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:16,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:16,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:16,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:16,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:16,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:16,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:16,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:16,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:16,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:16,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:16,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:16,241 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 23:44:16,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115710094] [2020-10-14 23:44:16,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:16,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:44:16,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028806070] [2020-10-14 23:44:16,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:44:16,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:16,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:44:16,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:44:16,244 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-10-14 23:44:16,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:16,314 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-14 23:44:16,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:44:16,315 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-14 23:44:16,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:16,316 INFO L225 Difference]: With dead ends: 36 [2020-10-14 23:44:16,316 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 23:44:16,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:44:16,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 23:44:16,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-14 23:44:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 23:44:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-14 23:44:16,321 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-10-14 23:44:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:16,321 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-14 23:44:16,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:44:16,322 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-14 23:44:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:44:16,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:16,323 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:16,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:44:16,323 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:16,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:16,323 INFO L82 PathProgramCache]: Analyzing trace with hash 120876845, now seen corresponding path program 8 times [2020-10-14 23:44:16,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:16,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839743158] [2020-10-14 23:44:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:16,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:16,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:16,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:44:16,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:16,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-14 23:44:16,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:16,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:44:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:44:16,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:16,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:16,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:16,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:16,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:16,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:16,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:16,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:16,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:16,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:16,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:16,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:16,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:16,627 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 23:44:16,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839743158] [2020-10-14 23:44:16,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:16,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:44:16,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442472585] [2020-10-14 23:44:16,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:44:16,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:16,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:44:16,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:44:16,630 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-10-14 23:44:16,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:16,729 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-14 23:44:16,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:44:16,730 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-14 23:44:16,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:16,731 INFO L225 Difference]: With dead ends: 38 [2020-10-14 23:44:16,731 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 23:44:16,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:44:16,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 23:44:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-14 23:44:16,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:44:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-14 23:44:16,737 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-10-14 23:44:16,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:16,737 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-14 23:44:16,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:44:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-14 23:44:16,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:44:16,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:16,739 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:16,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:44:16,739 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:16,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:16,740 INFO L82 PathProgramCache]: Analyzing trace with hash -642190641, now seen corresponding path program 9 times [2020-10-14 23:44:16,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:16,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787561845] [2020-10-14 23:44:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:16,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:17,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:17,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:44:17,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:17,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-14 23:44:17,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:17,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:17,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:44:17,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:17,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:44:17,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:17,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:17,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:17,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:17,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:17,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:17,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:44:17,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:17,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:17,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:17,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:17,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:17,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:17,140 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 23:44:17,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787561845] [2020-10-14 23:44:17,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:17,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:44:17,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745936954] [2020-10-14 23:44:17,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:44:17,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:17,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:44:17,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:44:17,142 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 13 states. [2020-10-14 23:44:17,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:17,244 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-14 23:44:17,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:44:17,245 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-14 23:44:17,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:17,245 INFO L225 Difference]: With dead ends: 40 [2020-10-14 23:44:17,245 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 23:44:17,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:44:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 23:44:17,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-14 23:44:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 23:44:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-14 23:44:17,252 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-10-14 23:44:17,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:17,252 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-14 23:44:17,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:44:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-14 23:44:17,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:44:17,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:17,256 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:17,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:44:17,257 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:17,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:17,257 INFO L82 PathProgramCache]: Analyzing trace with hash 489362929, now seen corresponding path program 10 times [2020-10-14 23:44:17,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:17,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533637778] [2020-10-14 23:44:17,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:17,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:17,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:17,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:44:17,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:17,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-10-14 23:44:17,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:17,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:17,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:44:17,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:17,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:44:17,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:17,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:17,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:17,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:17,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:17,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:17,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:17,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:17,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:17,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:17,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:17,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:17,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:17,676 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 23:44:17,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533637778] [2020-10-14 23:44:17,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:17,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:44:17,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164766315] [2020-10-14 23:44:17,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:44:17,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:17,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:44:17,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:44:17,678 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-10-14 23:44:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:17,750 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-14 23:44:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:44:17,750 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-14 23:44:17,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:17,751 INFO L225 Difference]: With dead ends: 42 [2020-10-14 23:44:17,751 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 23:44:17,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:44:17,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 23:44:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-14 23:44:17,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 23:44:17,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-14 23:44:17,757 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-10-14 23:44:17,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:17,758 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-14 23:44:17,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:44:17,758 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-14 23:44:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:44:17,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:17,759 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:17,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:44:17,759 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:17,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:17,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1285617811, now seen corresponding path program 11 times [2020-10-14 23:44:17,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:17,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425304528] [2020-10-14 23:44:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:17,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:18,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:18,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:44:18,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:18,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-14 23:44:18,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:18,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:18,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:44:18,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:18,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:44:18,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:44:18,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:18,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:18,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:18,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:18,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:18,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:18,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:18,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:18,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:18,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:18,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:18,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:18,333 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 23:44:18,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425304528] [2020-10-14 23:44:18,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:18,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:44:18,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92311535] [2020-10-14 23:44:18,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:44:18,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:18,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:44:18,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:44:18,338 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 15 states. [2020-10-14 23:44:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:18,452 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-14 23:44:18,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:44:18,453 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-14 23:44:18,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:18,454 INFO L225 Difference]: With dead ends: 44 [2020-10-14 23:44:18,455 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 23:44:18,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:44:18,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 23:44:18,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-14 23:44:18,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 23:44:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-14 23:44:18,471 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-10-14 23:44:18,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:18,472 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-14 23:44:18,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:44:18,472 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-14 23:44:18,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:44:18,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:18,473 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:18,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:44:18,474 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:18,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1982380725, now seen corresponding path program 12 times [2020-10-14 23:44:18,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:18,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470942342] [2020-10-14 23:44:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:18,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:18,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:18,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:44:18,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:18,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-14 23:44:18,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:18,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:18,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:44:18,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:18,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:44:18,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:19,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:19,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:19,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:19,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:19,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:19,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:19,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:19,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:19,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:19,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:19,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:19,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:19,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470942342] [2020-10-14 23:44:19,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:19,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:44:19,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586915271] [2020-10-14 23:44:19,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:44:19,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:19,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:44:19,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:44:19,031 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2020-10-14 23:44:19,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:19,123 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-14 23:44:19,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:44:19,124 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-14 23:44:19,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:19,125 INFO L225 Difference]: With dead ends: 46 [2020-10-14 23:44:19,125 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 23:44:19,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:44:19,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 23:44:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-14 23:44:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 23:44:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-14 23:44:19,130 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-10-14 23:44:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:19,130 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-14 23:44:19,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:44:19,131 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-14 23:44:19,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:44:19,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:19,131 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:19,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:44:19,132 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:19,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:19,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1556642903, now seen corresponding path program 13 times [2020-10-14 23:44:19,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:19,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900078338] [2020-10-14 23:44:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:19,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:19,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:19,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:44:19,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:19,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-14 23:44:19,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:19,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:19,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:44:19,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:19,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 23:44:19,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:19,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:19,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:19,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:19,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:19,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:19,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:19,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:19,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:19,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:19,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:19,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:19,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:19,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900078338] [2020-10-14 23:44:19,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:19,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:44:19,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451393477] [2020-10-14 23:44:19,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:44:19,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:19,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:44:19,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:44:19,772 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 17 states. [2020-10-14 23:44:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:19,867 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-14 23:44:19,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:44:19,867 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-14 23:44:19,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:19,868 INFO L225 Difference]: With dead ends: 48 [2020-10-14 23:44:19,868 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 23:44:19,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:44:19,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 23:44:19,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-14 23:44:19,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:44:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-14 23:44:19,873 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-10-14 23:44:19,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:19,874 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-14 23:44:19,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:44:19,874 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-14 23:44:19,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:44:19,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:19,875 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:19,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:44:19,875 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:19,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:19,875 INFO L82 PathProgramCache]: Analyzing trace with hash 444489081, now seen corresponding path program 14 times [2020-10-14 23:44:19,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:19,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191228410] [2020-10-14 23:44:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:19,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:20,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:20,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:44:20,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:20,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-14 23:44:20,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:20,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:20,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:44:20,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:20,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:44:20,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:20,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:20,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:20,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:20,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:20,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:20,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:20,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:20,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:20,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:20,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:20,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:20,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:20,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191228410] [2020-10-14 23:44:20,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:20,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:44:20,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082852632] [2020-10-14 23:44:20,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:44:20,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:20,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:44:20,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:44:20,674 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 18 states. [2020-10-14 23:44:20,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:20,809 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-14 23:44:20,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:44:20,810 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-14 23:44:20,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:20,811 INFO L225 Difference]: With dead ends: 50 [2020-10-14 23:44:20,811 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 23:44:20,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:44:20,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 23:44:20,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-14 23:44:20,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:44:20,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-14 23:44:20,816 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-10-14 23:44:20,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:20,816 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-14 23:44:20,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:44:20,817 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-14 23:44:20,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:44:20,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:20,817 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:20,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:44:20,818 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:20,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:20,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1111522843, now seen corresponding path program 15 times [2020-10-14 23:44:20,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:20,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846098456] [2020-10-14 23:44:20,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:20,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:21,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:21,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 23:44:21,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:21,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-14 23:44:21,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:21,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:21,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:44:21,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:21,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:44:21,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:21,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:21,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:21,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:21,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:21,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:21,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:21,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:21,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:21,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:21,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:21,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:21,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:21,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846098456] [2020-10-14 23:44:21,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:21,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:44:21,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297860950] [2020-10-14 23:44:21,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:44:21,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:21,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:44:21,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:44:21,555 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 19 states. [2020-10-14 23:44:21,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:21,668 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-14 23:44:21,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:44:21,669 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-14 23:44:21,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:21,669 INFO L225 Difference]: With dead ends: 52 [2020-10-14 23:44:21,670 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 23:44:21,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:44:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 23:44:21,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-14 23:44:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 23:44:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-14 23:44:21,675 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-10-14 23:44:21,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:21,675 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-14 23:44:21,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:44:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-14 23:44:21,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 23:44:21,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:21,676 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:21,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:44:21,677 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:21,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:21,677 INFO L82 PathProgramCache]: Analyzing trace with hash -2114126275, now seen corresponding path program 16 times [2020-10-14 23:44:21,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:21,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447612499] [2020-10-14 23:44:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:21,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:22,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:22,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:44:22,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:22,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-14 23:44:22,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:22,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:22,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:44:22,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:22,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:44:22,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:22,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:22,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:22,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:22,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:22,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:22,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:22,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:22,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:22,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:22,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:22,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:22,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:22,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447612499] [2020-10-14 23:44:22,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:22,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:44:22,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754399076] [2020-10-14 23:44:22,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:44:22,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:22,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:44:22,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:44:22,371 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 20 states. [2020-10-14 23:44:22,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:22,512 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-14 23:44:22,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:44:22,512 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-14 23:44:22,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:22,513 INFO L225 Difference]: With dead ends: 54 [2020-10-14 23:44:22,513 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 23:44:22,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:44:22,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 23:44:22,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-14 23:44:22,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:44:22,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-14 23:44:22,518 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-10-14 23:44:22,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:22,518 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-14 23:44:22,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:44:22,519 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-14 23:44:22,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:44:22,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:22,519 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:22,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:44:22,520 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:22,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:22,520 INFO L82 PathProgramCache]: Analyzing trace with hash -996540961, now seen corresponding path program 17 times [2020-10-14 23:44:22,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:22,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600211609] [2020-10-14 23:44:22,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:22,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:23,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:23,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:44:23,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:23,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 481 [2020-10-14 23:44:23,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:23,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:23,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:44:23,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:23,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:44:23,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:23,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:23,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:23,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:23,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:23,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:23,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:23,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:23,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:23,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:23,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:23,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:23,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:23,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600211609] [2020-10-14 23:44:23,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:23,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:44:23,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400273972] [2020-10-14 23:44:23,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:44:23,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:23,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:44:23,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:44:23,254 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 21 states. [2020-10-14 23:44:23,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:23,347 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-14 23:44:23,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:44:23,347 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-14 23:44:23,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:23,348 INFO L225 Difference]: With dead ends: 56 [2020-10-14 23:44:23,348 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 23:44:23,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:44:23,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 23:44:23,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-14 23:44:23,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 23:44:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-14 23:44:23,353 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-10-14 23:44:23,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:23,353 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-14 23:44:23,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:44:23,353 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-14 23:44:23,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:44:23,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:23,354 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:23,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:44:23,355 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:23,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:23,355 INFO L82 PathProgramCache]: Analyzing trace with hash -738878207, now seen corresponding path program 18 times [2020-10-14 23:44:23,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:23,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491322718] [2020-10-14 23:44:23,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:23,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:23,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:23,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:44:23,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:23,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 502 [2020-10-14 23:44:23,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:23,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:23,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:44:23,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:23,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:44:23,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:24,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:24,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:24,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:24,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:24,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:24,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:24,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:24,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:24,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:24,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:24,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:24,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:24,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491322718] [2020-10-14 23:44:24,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:24,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:44:24,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823631008] [2020-10-14 23:44:24,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:44:24,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:24,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:44:24,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:44:24,131 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 22 states. [2020-10-14 23:44:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:24,203 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-14 23:44:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:44:24,203 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-14 23:44:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:24,204 INFO L225 Difference]: With dead ends: 58 [2020-10-14 23:44:24,204 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 23:44:24,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:44:24,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 23:44:24,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-14 23:44:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:44:24,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-14 23:44:24,209 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-10-14 23:44:24,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:24,209 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-14 23:44:24,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:44:24,209 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-14 23:44:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:44:24,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:24,210 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:24,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:44:24,210 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:24,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:24,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2061892515, now seen corresponding path program 19 times [2020-10-14 23:44:24,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:24,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877324669] [2020-10-14 23:44:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:24,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:24,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:24,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:44:24,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:24,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 499 [2020-10-14 23:44:24,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:24,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:24,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:44:24,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:24,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 23:44:24,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:24,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:25,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:25,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:25,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:25,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:25,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:25,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:25,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:25,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:25,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:25,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:25,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:25,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877324669] [2020-10-14 23:44:25,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:25,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:44:25,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3857457] [2020-10-14 23:44:25,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:44:25,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:25,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:44:25,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:44:25,012 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 23 states. [2020-10-14 23:44:25,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:25,143 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-14 23:44:25,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:44:25,143 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-14 23:44:25,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:25,144 INFO L225 Difference]: With dead ends: 60 [2020-10-14 23:44:25,144 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 23:44:25,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:44:25,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 23:44:25,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-14 23:44:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 23:44:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-14 23:44:25,153 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-10-14 23:44:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:25,153 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-14 23:44:25,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:44:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-14 23:44:25,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:44:25,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:25,154 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:25,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:44:25,155 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:25,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:25,155 INFO L82 PathProgramCache]: Analyzing trace with hash 658061765, now seen corresponding path program 20 times [2020-10-14 23:44:25,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:25,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591884814] [2020-10-14 23:44:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:25,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:25,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:25,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 23:44:25,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:25,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 549 [2020-10-14 23:44:25,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:25,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:25,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:44:25,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:25,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:44:25,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:26,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:26,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:26,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:26,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:26,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:26,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:26,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:26,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:26,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:26,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:26,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:26,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:26,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591884814] [2020-10-14 23:44:26,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:26,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:44:26,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515880165] [2020-10-14 23:44:26,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:44:26,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:26,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:44:26,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:44:26,086 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 24 states. [2020-10-14 23:44:26,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:26,173 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-14 23:44:26,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:44:26,175 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-14 23:44:26,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:26,176 INFO L225 Difference]: With dead ends: 62 [2020-10-14 23:44:26,176 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 23:44:26,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:44:26,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 23:44:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-14 23:44:26,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:44:26,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-14 23:44:26,183 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-10-14 23:44:26,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:26,183 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-14 23:44:26,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:44:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-14 23:44:26,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 23:44:26,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:26,184 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:26,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:44:26,185 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:26,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:26,185 INFO L82 PathProgramCache]: Analyzing trace with hash 196441959, now seen corresponding path program 21 times [2020-10-14 23:44:26,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:26,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963341384] [2020-10-14 23:44:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:26,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:26,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:26,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 23:44:26,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:26,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 567 [2020-10-14 23:44:26,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:26,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:26,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:44:26,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:26,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:44:26,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:27,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:27,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:27,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:27,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:27,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:27,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 23:44:27,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:27,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:27,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:27,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:27,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:27,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:44:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:27,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963341384] [2020-10-14 23:44:27,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:27,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:44:27,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127234759] [2020-10-14 23:44:27,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:44:27,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:27,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:44:27,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:44:27,247 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 25 states. [2020-10-14 23:44:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:27,401 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-14 23:44:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:44:27,402 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-14 23:44:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:27,403 INFO L225 Difference]: With dead ends: 64 [2020-10-14 23:44:27,403 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 23:44:27,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:44:27,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 23:44:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-14 23:44:27,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 23:44:27,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-14 23:44:27,416 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-10-14 23:44:27,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:27,417 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-14 23:44:27,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:44:27,417 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-14 23:44:27,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 23:44:27,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:27,420 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:27,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:44:27,420 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:27,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:27,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1038560119, now seen corresponding path program 22 times [2020-10-14 23:44:27,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:27,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494271603] [2020-10-14 23:44:27,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:27,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:28,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:28,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 23:44:28,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:28,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 789 [2020-10-14 23:44:28,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:28,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:28,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:44:28,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:28,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 23:44:28,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:28,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:28,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:28,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:28,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:28,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:28,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:28,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:28,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:28,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:28,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:28,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:28,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:28,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494271603] [2020-10-14 23:44:28,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:28,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:44:28,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365059825] [2020-10-14 23:44:28,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:44:28,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:28,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:44:28,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:44:28,576 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 26 states. [2020-10-14 23:44:28,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:28,712 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-14 23:44:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:44:28,713 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-14 23:44:28,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:28,713 INFO L225 Difference]: With dead ends: 66 [2020-10-14 23:44:28,714 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 23:44:28,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:44:28,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 23:44:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-14 23:44:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 23:44:28,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-14 23:44:28,718 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-10-14 23:44:28,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:28,718 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-14 23:44:28,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:44:28,718 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-14 23:44:28,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 23:44:28,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:28,719 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:28,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:44:28,719 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:28,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:28,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1830383915, now seen corresponding path program 23 times [2020-10-14 23:44:28,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:28,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100187639] [2020-10-14 23:44:28,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:28,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:29,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:29,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:44:29,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:29,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 805 [2020-10-14 23:44:29,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:29,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:29,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 23:44:29,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:29,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:44:29,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:30,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:30,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:30,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:30,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:30,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:30,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:30,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:30,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:30,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:30,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:30,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:30,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:30,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100187639] [2020-10-14 23:44:30,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:30,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:44:30,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390328890] [2020-10-14 23:44:30,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:44:30,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:30,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:44:30,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:44:30,025 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 27 states. [2020-10-14 23:44:30,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:30,170 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-14 23:44:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:44:30,170 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-14 23:44:30,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:30,171 INFO L225 Difference]: With dead ends: 68 [2020-10-14 23:44:30,171 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 23:44:30,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:44:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 23:44:30,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-14 23:44:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 23:44:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-14 23:44:30,176 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-10-14 23:44:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:30,176 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-14 23:44:30,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:44:30,176 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-14 23:44:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 23:44:30,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:30,177 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:30,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:44:30,177 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:30,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:30,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1516596557, now seen corresponding path program 24 times [2020-10-14 23:44:30,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:30,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712941042] [2020-10-14 23:44:30,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:30,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:30,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:30,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 23:44:30,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:30,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 720 [2020-10-14 23:44:30,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:30,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:30,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:44:30,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:30,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 23:44:30,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:31,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:31,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:31,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:31,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:31,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:31,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:31,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:31,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:31,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:31,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:31,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:31,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:31,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712941042] [2020-10-14 23:44:31,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:31,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 23:44:31,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814950793] [2020-10-14 23:44:31,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 23:44:31,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:31,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 23:44:31,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:44:31,309 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 28 states. [2020-10-14 23:44:31,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:31,450 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-14 23:44:31,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:44:31,451 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-14 23:44:31,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:31,451 INFO L225 Difference]: With dead ends: 70 [2020-10-14 23:44:31,451 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 23:44:31,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:44:31,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 23:44:31,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-14 23:44:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 23:44:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-14 23:44:31,459 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-10-14 23:44:31,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:31,459 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-14 23:44:31,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 23:44:31,460 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-14 23:44:31,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 23:44:31,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:31,460 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:31,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:44:31,461 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:31,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:31,461 INFO L82 PathProgramCache]: Analyzing trace with hash 614656239, now seen corresponding path program 25 times [2020-10-14 23:44:31,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:31,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816536632] [2020-10-14 23:44:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:31,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:32,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:32,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 23:44:32,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:32,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 713 [2020-10-14 23:44:32,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:32,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:32,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 23:44:32,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:32,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 23:44:32,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:32,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:32,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:32,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:32,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:32,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:32,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:32,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:32,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:32,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:32,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:32,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:32,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:44:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:32,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816536632] [2020-10-14 23:44:32,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:32,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 23:44:32,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398009429] [2020-10-14 23:44:32,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 23:44:32,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:32,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 23:44:32,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:44:32,690 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 29 states. [2020-10-14 23:44:32,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:32,881 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-14 23:44:32,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 23:44:32,881 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-14 23:44:32,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:32,882 INFO L225 Difference]: With dead ends: 72 [2020-10-14 23:44:32,882 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 23:44:32,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:44:32,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 23:44:32,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-14 23:44:32,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 23:44:32,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-10-14 23:44:32,887 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-10-14 23:44:32,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:32,887 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-10-14 23:44:32,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 23:44:32,888 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-10-14 23:44:32,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 23:44:32,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:32,888 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:32,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:44:32,889 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:32,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:32,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1433404433, now seen corresponding path program 26 times [2020-10-14 23:44:32,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:32,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983776687] [2020-10-14 23:44:32,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:32,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:33,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:33,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 23:44:33,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:33,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 812 [2020-10-14 23:44:33,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:33,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:33,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 23:44:33,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:33,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 23:44:33,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:34,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:34,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:34,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:34,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:34,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:34,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:34,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:34,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:34,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:34,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:34,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:34,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:34,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983776687] [2020-10-14 23:44:34,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:34,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 23:44:34,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023263964] [2020-10-14 23:44:34,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 23:44:34,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:34,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 23:44:34,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:44:34,196 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 30 states. [2020-10-14 23:44:34,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:34,372 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-14 23:44:34,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:44:34,372 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-10-14 23:44:34,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:34,373 INFO L225 Difference]: With dead ends: 74 [2020-10-14 23:44:34,373 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 23:44:34,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:44:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 23:44:34,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-14 23:44:34,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 23:44:34,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-14 23:44:34,379 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-10-14 23:44:34,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:34,381 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-14 23:44:34,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 23:44:34,381 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-14 23:44:34,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 23:44:34,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:34,382 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:34,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:44:34,382 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:34,383 INFO L82 PathProgramCache]: Analyzing trace with hash -2023563597, now seen corresponding path program 27 times [2020-10-14 23:44:34,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:34,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705653546] [2020-10-14 23:44:34,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:34,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:35,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:35,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 23:44:35,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:35,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 818 [2020-10-14 23:44:35,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:35,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:35,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 23:44:35,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:35,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 23:44:35,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:35,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:35,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:35,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:35,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:35,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:35,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:35,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:35,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:35,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:35,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:35,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:35,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:35,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705653546] [2020-10-14 23:44:35,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:35,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 23:44:35,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932456548] [2020-10-14 23:44:35,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 23:44:35,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:35,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 23:44:35,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:44:35,802 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 31 states. [2020-10-14 23:44:36,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:36,007 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-14 23:44:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:44:36,008 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-14 23:44:36,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:36,008 INFO L225 Difference]: With dead ends: 76 [2020-10-14 23:44:36,009 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 23:44:36,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:44:36,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 23:44:36,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-14 23:44:36,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 23:44:36,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-14 23:44:36,015 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-10-14 23:44:36,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:36,015 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-14 23:44:36,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 23:44:36,015 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-14 23:44:36,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 23:44:36,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:36,016 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:36,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:44:36,017 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:36,017 INFO L82 PathProgramCache]: Analyzing trace with hash 134846677, now seen corresponding path program 28 times [2020-10-14 23:44:36,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:36,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702943574] [2020-10-14 23:44:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:36,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:37,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:37,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 23:44:37,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:37,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1075 [2020-10-14 23:44:37,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:37,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 23:44:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 23:44:37,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:37,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:37,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:37,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:37,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:37,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:37,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:37,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:37,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:37,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:37,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:37,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:37,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:37,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702943574] [2020-10-14 23:44:37,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:37,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 23:44:37,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045560092] [2020-10-14 23:44:37,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 23:44:37,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:37,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 23:44:37,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:44:37,828 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 32 states. [2020-10-14 23:44:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:38,067 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-14 23:44:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:44:38,068 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-10-14 23:44:38,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:38,070 INFO L225 Difference]: With dead ends: 78 [2020-10-14 23:44:38,070 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 23:44:38,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:44:38,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 23:44:38,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-14 23:44:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 23:44:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-14 23:44:38,076 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-10-14 23:44:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:38,076 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-14 23:44:38,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 23:44:38,077 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-14 23:44:38,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 23:44:38,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:38,078 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:38,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:44:38,078 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:38,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:38,079 INFO L82 PathProgramCache]: Analyzing trace with hash -102083977, now seen corresponding path program 29 times [2020-10-14 23:44:38,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:38,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977210410] [2020-10-14 23:44:38,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:38,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:39,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:39,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 23:44:39,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:39,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1292 [2020-10-14 23:44:39,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:39,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:39,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 23:44:39,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:39,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 23:44:39,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:39,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:39,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:39,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:39,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:39,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:39,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:39,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:39,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:39,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:39,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:39,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:39,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:39,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977210410] [2020-10-14 23:44:39,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:39,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 23:44:39,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452753179] [2020-10-14 23:44:39,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 23:44:39,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:39,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 23:44:39,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:44:39,937 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 33 states. [2020-10-14 23:44:40,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:40,132 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-14 23:44:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 23:44:40,132 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-14 23:44:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:40,133 INFO L225 Difference]: With dead ends: 80 [2020-10-14 23:44:40,133 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 23:44:40,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:44:40,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 23:44:40,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-14 23:44:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 23:44:40,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-14 23:44:40,142 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-10-14 23:44:40,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:40,143 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-14 23:44:40,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 23:44:40,143 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-14 23:44:40,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 23:44:40,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:40,144 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:40,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:44:40,144 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:40,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:40,144 INFO L82 PathProgramCache]: Analyzing trace with hash -159175783, now seen corresponding path program 30 times [2020-10-14 23:44:40,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:40,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858474571] [2020-10-14 23:44:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:40,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:41,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:41,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 23:44:41,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:41,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1184 [2020-10-14 23:44:41,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:41,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 23:44:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:41,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 23:44:41,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:41,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:41,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:41,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:41,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:41,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:41,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:41,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:41,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:41,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:41,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:41,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:41,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:41,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858474571] [2020-10-14 23:44:41,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:41,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 23:44:41,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437290054] [2020-10-14 23:44:41,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 23:44:41,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:41,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 23:44:41,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:44:41,941 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 34 states. [2020-10-14 23:44:42,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:42,136 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-10-14 23:44:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 23:44:42,136 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-10-14 23:44:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:42,137 INFO L225 Difference]: With dead ends: 82 [2020-10-14 23:44:42,137 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 23:44:42,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:44:42,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 23:44:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-14 23:44:42,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 23:44:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-10-14 23:44:42,141 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-10-14 23:44:42,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:42,141 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-10-14 23:44:42,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 23:44:42,142 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-10-14 23:44:42,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 23:44:42,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:42,142 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:42,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:44:42,143 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:42,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:42,143 INFO L82 PathProgramCache]: Analyzing trace with hash 810173499, now seen corresponding path program 31 times [2020-10-14 23:44:42,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:42,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048674163] [2020-10-14 23:44:42,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:42,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:42,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:42,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 23:44:42,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:42,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 820 [2020-10-14 23:44:42,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:42,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:42,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 23:44:42,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:42,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 23:44:42,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:43,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:43,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:43,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:43,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:43,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:43,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:43,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:43,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:43,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:43,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:43,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:43,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:43,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048674163] [2020-10-14 23:44:43,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:43,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 23:44:43,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70176287] [2020-10-14 23:44:43,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 23:44:43,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:43,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 23:44:43,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:44:43,620 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 35 states. [2020-10-14 23:44:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:43,840 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-10-14 23:44:43,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 23:44:43,841 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-14 23:44:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:43,842 INFO L225 Difference]: With dead ends: 84 [2020-10-14 23:44:43,842 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 23:44:43,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:44:43,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 23:44:43,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-14 23:44:43,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 23:44:43,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-10-14 23:44:43,847 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-10-14 23:44:43,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:43,847 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-10-14 23:44:43,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 23:44:43,848 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-10-14 23:44:43,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 23:44:43,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:43,849 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:43,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:44:43,849 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:43,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:43,849 INFO L82 PathProgramCache]: Analyzing trace with hash 346930269, now seen corresponding path program 32 times [2020-10-14 23:44:43,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:43,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910483556] [2020-10-14 23:44:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:43,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:44,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:44,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 23:44:44,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:44,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 755 [2020-10-14 23:44:44,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:44,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:44,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 23:44:44,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:44,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 23:44:44,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:45,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:45,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:45,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:45,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:45,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:45,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:45,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:45,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:45,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:45,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:45,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:45,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:45,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910483556] [2020-10-14 23:44:45,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:45,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 23:44:45,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168873046] [2020-10-14 23:44:45,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 23:44:45,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:45,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 23:44:45,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:44:45,273 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 36 states. [2020-10-14 23:44:45,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:45,445 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-10-14 23:44:45,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 23:44:45,445 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-10-14 23:44:45,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:45,446 INFO L225 Difference]: With dead ends: 86 [2020-10-14 23:44:45,447 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 23:44:45,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:44:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 23:44:45,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-14 23:44:45,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 23:44:45,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-10-14 23:44:45,451 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-10-14 23:44:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:45,451 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-10-14 23:44:45,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 23:44:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-10-14 23:44:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 23:44:45,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:45,452 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:45,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:44:45,453 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:45,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:45,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1846785023, now seen corresponding path program 33 times [2020-10-14 23:44:45,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:45,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462275504] [2020-10-14 23:44:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:45,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:46,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:46,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 23:44:46,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:46,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 728 [2020-10-14 23:44:46,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:46,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:46,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 23:44:46,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:46,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 23:44:46,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:46,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:46,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:46,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:46,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:46,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:46,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:46,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:46,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:46,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:46,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:46,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:46,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:46,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462275504] [2020-10-14 23:44:46,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:46,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 23:44:46,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197251775] [2020-10-14 23:44:46,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 23:44:46,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:46,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 23:44:46,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:44:46,862 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 37 states. [2020-10-14 23:44:47,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:47,069 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-10-14 23:44:47,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 23:44:47,069 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-14 23:44:47,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:47,071 INFO L225 Difference]: With dead ends: 88 [2020-10-14 23:44:47,071 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 23:44:47,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:44:47,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 23:44:47,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-14 23:44:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 23:44:47,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-10-14 23:44:47,077 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-10-14 23:44:47,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:47,077 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-10-14 23:44:47,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 23:44:47,077 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-10-14 23:44:47,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 23:44:47,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:47,078 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:47,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:44:47,079 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:47,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:47,079 INFO L82 PathProgramCache]: Analyzing trace with hash 98192161, now seen corresponding path program 34 times [2020-10-14 23:44:47,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:47,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319003510] [2020-10-14 23:44:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:47,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:47,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:47,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 23:44:47,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:47,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 844 [2020-10-14 23:44:47,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:47,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:47,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 23:44:47,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:47,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 23:44:47,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:48,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:48,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:48,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:48,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:48,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:48,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:48,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:48,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:48,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:48,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:48,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:48,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:48,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319003510] [2020-10-14 23:44:48,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:48,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 23:44:48,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457418206] [2020-10-14 23:44:48,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 23:44:48,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:48,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 23:44:48,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:44:48,625 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 38 states. [2020-10-14 23:44:48,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:48,812 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-10-14 23:44:48,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 23:44:48,812 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-10-14 23:44:48,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:48,813 INFO L225 Difference]: With dead ends: 90 [2020-10-14 23:44:48,814 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 23:44:48,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:44:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 23:44:48,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-14 23:44:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 23:44:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-10-14 23:44:48,818 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-10-14 23:44:48,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:48,819 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-10-14 23:44:48,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 23:44:48,819 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-10-14 23:44:48,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 23:44:48,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:48,820 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:48,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:44:48,820 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:48,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:48,820 INFO L82 PathProgramCache]: Analyzing trace with hash -967335485, now seen corresponding path program 35 times [2020-10-14 23:44:48,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:48,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915063709] [2020-10-14 23:44:48,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:48,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:49,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:49,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 23:44:49,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:49,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 823 [2020-10-14 23:44:49,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:49,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:49,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 23:44:49,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:49,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 23:44:49,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:50,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:50,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:50,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:50,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:50,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:50,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:44:50,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:50,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:50,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:50,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:50,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:50,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:50,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915063709] [2020-10-14 23:44:50,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:50,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 23:44:50,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322989734] [2020-10-14 23:44:50,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 23:44:50,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:50,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 23:44:50,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:44:50,404 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 39 states. [2020-10-14 23:44:50,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:50,560 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-10-14 23:44:50,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 23:44:50,561 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-10-14 23:44:50,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:50,562 INFO L225 Difference]: With dead ends: 92 [2020-10-14 23:44:50,562 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 23:44:50,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:44:50,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 23:44:50,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-14 23:44:50,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 23:44:50,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-10-14 23:44:50,567 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-10-14 23:44:50,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:50,568 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-10-14 23:44:50,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 23:44:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-10-14 23:44:50,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 23:44:50,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:50,569 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:50,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:44:50,569 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:50,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:50,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1557780453, now seen corresponding path program 36 times [2020-10-14 23:44:50,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:50,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474386213] [2020-10-14 23:44:50,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:50,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:51,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:51,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 23:44:51,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:51,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 880 [2020-10-14 23:44:51,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:51,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:51,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 23:44:51,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:51,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 23:44:51,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:52,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:52,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:52,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:52,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:52,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:52,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:52,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:52,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:52,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:52,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:52,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:52,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:52,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:52,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474386213] [2020-10-14 23:44:52,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:52,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 23:44:52,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316426132] [2020-10-14 23:44:52,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 23:44:52,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:52,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 23:44:52,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 23:44:52,242 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 40 states. [2020-10-14 23:44:52,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:52,478 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-10-14 23:44:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 23:44:52,479 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-10-14 23:44:52,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:52,480 INFO L225 Difference]: With dead ends: 94 [2020-10-14 23:44:52,480 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 23:44:52,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 23:44:52,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 23:44:52,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-14 23:44:52,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 23:44:52,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-10-14 23:44:52,485 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-10-14 23:44:52,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:52,486 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-10-14 23:44:52,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 23:44:52,486 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-10-14 23:44:52,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 23:44:52,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:52,487 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:52,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:44:52,487 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:52,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:52,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1537674631, now seen corresponding path program 37 times [2020-10-14 23:44:52,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:52,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564759285] [2020-10-14 23:44:52,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:52,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:53,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:53,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 23:44:53,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:53,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 961 [2020-10-14 23:44:53,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:53,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:53,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 23:44:53,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:53,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 23:44:53,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:54,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:54,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:54,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:54,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:54,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:54,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:54,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:54,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:54,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:54,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:54,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:54,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:54,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564759285] [2020-10-14 23:44:54,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:54,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 23:44:54,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516169281] [2020-10-14 23:44:54,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 23:44:54,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:54,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 23:44:54,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:44:54,246 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 41 states. [2020-10-14 23:44:54,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:54,492 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-10-14 23:44:54,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 23:44:54,493 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-14 23:44:54,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:54,494 INFO L225 Difference]: With dead ends: 96 [2020-10-14 23:44:54,494 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 23:44:54,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:44:54,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 23:44:54,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-14 23:44:54,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 23:44:54,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-10-14 23:44:54,504 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-10-14 23:44:54,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:54,504 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-10-14 23:44:54,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 23:44:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-10-14 23:44:54,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 23:44:54,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:54,505 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:54,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 23:44:54,506 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:54,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:54,506 INFO L82 PathProgramCache]: Analyzing trace with hash -604151127, now seen corresponding path program 38 times [2020-10-14 23:44:54,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:54,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932793475] [2020-10-14 23:44:54,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:54,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:55,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:55,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 23:44:55,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:55,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-10-14 23:44:55,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:55,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:55,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 23:44:55,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:55,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 23:44:55,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:56,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:56,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:56,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:56,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:56,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:56,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:56,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:56,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:56,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:56,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:56,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:56,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:56,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932793475] [2020-10-14 23:44:56,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:56,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 23:44:56,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240106199] [2020-10-14 23:44:56,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 23:44:56,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:56,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 23:44:56,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 23:44:56,374 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 42 states. [2020-10-14 23:44:56,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:56,613 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-10-14 23:44:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 23:44:56,614 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-10-14 23:44:56,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:56,615 INFO L225 Difference]: With dead ends: 98 [2020-10-14 23:44:56,615 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 23:44:56,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 23:44:56,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 23:44:56,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-14 23:44:56,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 23:44:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-10-14 23:44:56,621 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-10-14 23:44:56,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:56,621 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-10-14 23:44:56,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 23:44:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-10-14 23:44:56,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 23:44:56,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:56,622 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:56,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 23:44:56,623 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:56,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:56,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1609369781, now seen corresponding path program 39 times [2020-10-14 23:44:56,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:56,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105690973] [2020-10-14 23:44:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:56,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:57,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:57,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 23:44:57,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:57,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1142 [2020-10-14 23:44:57,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:57,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:57,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 23:44:57,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:44:57,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-14 23:44:57,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:58,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:58,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:58,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:58,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:58,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:58,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:58,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:58,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:58,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:58,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:58,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:58,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:44:58,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105690973] [2020-10-14 23:44:58,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:58,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 23:44:58,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891465817] [2020-10-14 23:44:58,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 23:44:58,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:58,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 23:44:58,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:44:58,659 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 43 states. [2020-10-14 23:44:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:58,907 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-10-14 23:44:58,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 23:44:58,907 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-10-14 23:44:58,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:58,908 INFO L225 Difference]: With dead ends: 100 [2020-10-14 23:44:58,908 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 23:44:58,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:44:58,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 23:44:58,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-14 23:44:58,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 23:44:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-10-14 23:44:58,914 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-10-14 23:44:58,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:58,915 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-10-14 23:44:58,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 23:44:58,915 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-10-14 23:44:58,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-14 23:44:58,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:58,916 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:58,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 23:44:58,916 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:58,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:58,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1256854675, now seen corresponding path program 40 times [2020-10-14 23:44:58,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:58,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804593609] [2020-10-14 23:44:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:58,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:00,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:00,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 23:45:00,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:00,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1178 [2020-10-14 23:45:00,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:00,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:00,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 23:45:00,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:00,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 23:45:00,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:01,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:01,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:01,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:01,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:01,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:01,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:01,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:01,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:01,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:01,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:01,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:01,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:01,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804593609] [2020-10-14 23:45:01,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:01,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 23:45:01,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839614837] [2020-10-14 23:45:01,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 23:45:01,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:01,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 23:45:01,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 23:45:01,033 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 44 states. [2020-10-14 23:45:01,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:01,223 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-10-14 23:45:01,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 23:45:01,224 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 92 [2020-10-14 23:45:01,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:01,226 INFO L225 Difference]: With dead ends: 102 [2020-10-14 23:45:01,226 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 23:45:01,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 23:45:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 23:45:01,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-14 23:45:01,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 23:45:01,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-10-14 23:45:01,231 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-10-14 23:45:01,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:01,232 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-10-14 23:45:01,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 23:45:01,232 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-10-14 23:45:01,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 23:45:01,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:01,233 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:01,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 23:45:01,233 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:01,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:01,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1792254193, now seen corresponding path program 41 times [2020-10-14 23:45:01,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:01,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716969029] [2020-10-14 23:45:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:01,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:02,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:02,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 23:45:02,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:02,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1197 [2020-10-14 23:45:02,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:02,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:02,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 23:45:02,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:02,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 23:45:02,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:03,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:03,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:03,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:03,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:03,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:03,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:03,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:03,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:03,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:03,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:03,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:03,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:03,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716969029] [2020-10-14 23:45:03,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:03,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 23:45:03,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461586399] [2020-10-14 23:45:03,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 23:45:03,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:03,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 23:45:03,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:45:03,429 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 45 states. [2020-10-14 23:45:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:03,684 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-10-14 23:45:03,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 23:45:03,684 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 94 [2020-10-14 23:45:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:03,686 INFO L225 Difference]: With dead ends: 104 [2020-10-14 23:45:03,686 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 23:45:03,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:45:03,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 23:45:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-14 23:45:03,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 23:45:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-10-14 23:45:03,692 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-10-14 23:45:03,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:03,693 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-10-14 23:45:03,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 23:45:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-10-14 23:45:03,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 23:45:03,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:03,694 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:03,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 23:45:03,694 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:03,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:03,694 INFO L82 PathProgramCache]: Analyzing trace with hash -915115471, now seen corresponding path program 42 times [2020-10-14 23:45:03,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:03,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259092625] [2020-10-14 23:45:03,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:03,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:05,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:05,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 23:45:05,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:05,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1340 [2020-10-14 23:45:05,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:05,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 23:45:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 23:45:05,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:06,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:06,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:06,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:06,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:06,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:06,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:06,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:06,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:06,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:06,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:06,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:06,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:06,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259092625] [2020-10-14 23:45:06,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:06,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 23:45:06,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705150994] [2020-10-14 23:45:06,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 23:45:06,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:06,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 23:45:06,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 23:45:06,085 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 46 states. [2020-10-14 23:45:06,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:06,256 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-10-14 23:45:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 23:45:06,256 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 96 [2020-10-14 23:45:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:06,258 INFO L225 Difference]: With dead ends: 106 [2020-10-14 23:45:06,258 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 23:45:06,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 23:45:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 23:45:06,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-14 23:45:06,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 23:45:06,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-10-14 23:45:06,263 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-10-14 23:45:06,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:06,263 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-10-14 23:45:06,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 23:45:06,264 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-10-14 23:45:06,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 23:45:06,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:06,265 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:06,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 23:45:06,265 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:06,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:06,265 INFO L82 PathProgramCache]: Analyzing trace with hash 201606355, now seen corresponding path program 43 times [2020-10-14 23:45:06,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:06,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222060024] [2020-10-14 23:45:06,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:06,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:07,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:07,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 23:45:07,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:07,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1369 [2020-10-14 23:45:07,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:07,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:07,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 23:45:07,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:07,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 23:45:07,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:08,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:08,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:08,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:08,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:08,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:08,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:08,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:08,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:08,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:08,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:08,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:08,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:08,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222060024] [2020-10-14 23:45:08,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:08,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 23:45:08,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641141296] [2020-10-14 23:45:08,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 23:45:08,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:08,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 23:45:08,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:45:08,727 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 47 states. [2020-10-14 23:45:09,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:09,005 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-10-14 23:45:09,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 23:45:09,006 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 98 [2020-10-14 23:45:09,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:09,007 INFO L225 Difference]: With dead ends: 108 [2020-10-14 23:45:09,007 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 23:45:09,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:45:09,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 23:45:09,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-14 23:45:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 23:45:09,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-10-14 23:45:09,011 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-10-14 23:45:09,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:09,012 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-10-14 23:45:09,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 23:45:09,012 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-10-14 23:45:09,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 23:45:09,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:09,013 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:09,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 23:45:09,013 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:09,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:09,013 INFO L82 PathProgramCache]: Analyzing trace with hash -370542859, now seen corresponding path program 44 times [2020-10-14 23:45:09,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:09,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105745744] [2020-10-14 23:45:09,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:09,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:10,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:10,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 23:45:10,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:10,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1456 [2020-10-14 23:45:10,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:10,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:10,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 23:45:10,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:10,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 23:45:10,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:11,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:11,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:11,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:11,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:11,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:11,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:11,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:11,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:11,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:11,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:11,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:11,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:11,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105745744] [2020-10-14 23:45:11,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:11,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 23:45:11,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114131147] [2020-10-14 23:45:11,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 23:45:11,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:11,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 23:45:11,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 23:45:11,611 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 48 states. [2020-10-14 23:45:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:11,823 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-10-14 23:45:11,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 23:45:11,824 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 100 [2020-10-14 23:45:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:11,825 INFO L225 Difference]: With dead ends: 110 [2020-10-14 23:45:11,825 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 23:45:11,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 23:45:11,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 23:45:11,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-14 23:45:11,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 23:45:11,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-10-14 23:45:11,832 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-10-14 23:45:11,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:11,832 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-10-14 23:45:11,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 23:45:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-10-14 23:45:11,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-14 23:45:11,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:11,833 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:11,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 23:45:11,834 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:11,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:11,834 INFO L82 PathProgramCache]: Analyzing trace with hash -450123625, now seen corresponding path program 45 times [2020-10-14 23:45:11,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:11,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192227399] [2020-10-14 23:45:11,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:11,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:13,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:13,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 23:45:13,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:13,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1501 [2020-10-14 23:45:13,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:13,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:13,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 23:45:13,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:13,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-14 23:45:13,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:14,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:14,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:14,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:14,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:14,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:14,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:14,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:14,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:14,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:14,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:14,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:14,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:14,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192227399] [2020-10-14 23:45:14,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:14,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 23:45:14,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436902872] [2020-10-14 23:45:14,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 23:45:14,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:14,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 23:45:14,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 23:45:14,504 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 49 states. [2020-10-14 23:45:14,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:14,697 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-10-14 23:45:14,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 23:45:14,698 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 102 [2020-10-14 23:45:14,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:14,699 INFO L225 Difference]: With dead ends: 112 [2020-10-14 23:45:14,699 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 23:45:14,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 23:45:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 23:45:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-14 23:45:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 23:45:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-10-14 23:45:14,704 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-10-14 23:45:14,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:14,704 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-10-14 23:45:14,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 23:45:14,704 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-10-14 23:45:14,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 23:45:14,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:14,705 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:14,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 23:45:14,706 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:14,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:14,706 INFO L82 PathProgramCache]: Analyzing trace with hash 382171577, now seen corresponding path program 46 times [2020-10-14 23:45:14,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:14,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715374130] [2020-10-14 23:45:14,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:14,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:16,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:16,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 23:45:16,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:16,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1622 [2020-10-14 23:45:16,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:16,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:16,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 23:45:16,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:16,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 23:45:16,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:17,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:17,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:17,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:17,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:17,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:17,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:17,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:17,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:17,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:17,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:17,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:17,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:17,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715374130] [2020-10-14 23:45:17,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:17,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-14 23:45:17,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943774101] [2020-10-14 23:45:17,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 23:45:17,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:17,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 23:45:17,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 23:45:17,553 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 50 states. [2020-10-14 23:45:17,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:17,736 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-10-14 23:45:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-14 23:45:17,736 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 104 [2020-10-14 23:45:17,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:17,738 INFO L225 Difference]: With dead ends: 114 [2020-10-14 23:45:17,738 INFO L226 Difference]: Without dead ends: 108 [2020-10-14 23:45:17,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 23:45:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-14 23:45:17,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-14 23:45:17,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 23:45:17,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-10-14 23:45:17,743 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-10-14 23:45:17,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:17,744 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-10-14 23:45:17,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 23:45:17,744 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-10-14 23:45:17,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 23:45:17,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:17,745 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:17,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 23:45:17,745 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:17,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:17,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1353943643, now seen corresponding path program 47 times [2020-10-14 23:45:17,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:17,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795721765] [2020-10-14 23:45:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:17,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:19,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:19,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 23:45:19,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:19,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1768 [2020-10-14 23:45:19,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:19,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:19,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 23:45:19,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:19,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 23:45:19,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:20,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:20,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:20,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:20,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:20,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:20,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:20,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:20,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:20,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:20,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:20,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:20,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:20,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795721765] [2020-10-14 23:45:20,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:20,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-14 23:45:20,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242386017] [2020-10-14 23:45:20,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-14 23:45:20,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:20,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-14 23:45:20,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 23:45:20,790 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 51 states. [2020-10-14 23:45:20,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:20,999 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-10-14 23:45:21,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 23:45:21,000 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 106 [2020-10-14 23:45:21,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:21,001 INFO L225 Difference]: With dead ends: 116 [2020-10-14 23:45:21,001 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 23:45:21,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 23:45:21,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 23:45:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-14 23:45:21,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 23:45:21,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-10-14 23:45:21,007 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-10-14 23:45:21,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:21,008 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-10-14 23:45:21,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-14 23:45:21,008 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-10-14 23:45:21,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 23:45:21,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:21,009 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:21,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 23:45:21,009 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:21,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:21,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1075971459, now seen corresponding path program 48 times [2020-10-14 23:45:21,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:21,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648412860] [2020-10-14 23:45:21,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:21,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:22,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:22,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 23:45:22,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:22,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1793 [2020-10-14 23:45:22,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:22,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:22,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-14 23:45:22,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:22,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-14 23:45:22,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:24,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:24,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:24,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:24,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:24,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:24,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:45:24,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:24,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:24,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:24,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:24,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:24,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:24,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648412860] [2020-10-14 23:45:24,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:24,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-14 23:45:24,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572358811] [2020-10-14 23:45:24,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-14 23:45:24,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:24,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-14 23:45:24,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 23:45:24,152 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 52 states. [2020-10-14 23:45:24,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:24,362 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-10-14 23:45:24,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-14 23:45:24,362 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 108 [2020-10-14 23:45:24,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:24,364 INFO L225 Difference]: With dead ends: 118 [2020-10-14 23:45:24,364 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 23:45:24,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 23:45:24,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 23:45:24,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-14 23:45:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 23:45:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-10-14 23:45:24,370 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-10-14 23:45:24,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:24,370 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-10-14 23:45:24,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-14 23:45:24,371 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-10-14 23:45:24,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 23:45:24,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:24,371 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:24,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 23:45:24,372 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:24,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:24,372 INFO L82 PathProgramCache]: Analyzing trace with hash 237824543, now seen corresponding path program 49 times [2020-10-14 23:45:24,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:24,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142561435] [2020-10-14 23:45:24,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:24,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:26,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:26,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 23:45:26,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:26,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1950 [2020-10-14 23:45:26,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:26,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:26,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-14 23:45:26,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:26,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-14 23:45:26,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:27,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:27,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:27,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:27,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:27,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:27,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:27,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:27,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:27,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:27,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:27,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:27,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:27,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142561435] [2020-10-14 23:45:27,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:27,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-14 23:45:27,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47915978] [2020-10-14 23:45:27,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-14 23:45:27,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:27,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-14 23:45:27,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 23:45:27,740 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 53 states. [2020-10-14 23:45:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:27,991 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-10-14 23:45:27,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 23:45:27,992 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 110 [2020-10-14 23:45:27,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:27,994 INFO L225 Difference]: With dead ends: 120 [2020-10-14 23:45:27,994 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 23:45:27,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 23:45:27,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 23:45:28,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-14 23:45:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 23:45:28,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-10-14 23:45:28,006 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-10-14 23:45:28,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:28,007 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-10-14 23:45:28,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-14 23:45:28,007 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-10-14 23:45:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-14 23:45:28,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:28,009 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:28,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 23:45:28,009 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:28,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:28,010 INFO L82 PathProgramCache]: Analyzing trace with hash 75397441, now seen corresponding path program 50 times [2020-10-14 23:45:28,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:28,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433601305] [2020-10-14 23:45:28,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:28,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:30,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:30,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 23:45:30,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:30,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2093 [2020-10-14 23:45:30,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:30,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:30,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-14 23:45:30,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:30,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-14 23:45:30,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:31,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:31,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:31,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:31,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:31,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:31,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:31,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:31,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:31,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:31,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:31,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:31,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:31,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433601305] [2020-10-14 23:45:31,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:31,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-14 23:45:31,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77977796] [2020-10-14 23:45:31,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-14 23:45:31,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:31,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-14 23:45:31,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 23:45:31,611 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 54 states. [2020-10-14 23:45:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:31,936 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-10-14 23:45:31,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-14 23:45:31,936 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 112 [2020-10-14 23:45:31,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:31,938 INFO L225 Difference]: With dead ends: 122 [2020-10-14 23:45:31,938 INFO L226 Difference]: Without dead ends: 116 [2020-10-14 23:45:31,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 23:45:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-14 23:45:31,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-14 23:45:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 23:45:31,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-10-14 23:45:31,943 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2020-10-14 23:45:31,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:31,943 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-10-14 23:45:31,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-14 23:45:31,943 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-10-14 23:45:31,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 23:45:31,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:31,944 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:31,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 23:45:31,944 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:31,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:31,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1398224925, now seen corresponding path program 51 times [2020-10-14 23:45:31,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:31,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54599998] [2020-10-14 23:45:31,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:31,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:34,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:34,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 23:45:34,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:34,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2136 [2020-10-14 23:45:34,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:34,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:34,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-14 23:45:34,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:34,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-14 23:45:34,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:35,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:35,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:35,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:35,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:35,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:35,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:35,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:35,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:35,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:35,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:35,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:35,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:35,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54599998] [2020-10-14 23:45:35,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:35,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-14 23:45:35,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048257170] [2020-10-14 23:45:35,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-14 23:45:35,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:35,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-14 23:45:35,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 23:45:35,584 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 55 states. [2020-10-14 23:45:35,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:35,892 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-10-14 23:45:35,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-14 23:45:35,893 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 114 [2020-10-14 23:45:35,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:35,894 INFO L225 Difference]: With dead ends: 124 [2020-10-14 23:45:35,894 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 23:45:35,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 23:45:35,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 23:45:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-14 23:45:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 23:45:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-10-14 23:45:35,899 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2020-10-14 23:45:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:35,899 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-10-14 23:45:35,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-14 23:45:35,900 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-10-14 23:45:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 23:45:35,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:35,900 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:35,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 23:45:35,901 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:35,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:35,901 INFO L82 PathProgramCache]: Analyzing trace with hash -210110971, now seen corresponding path program 52 times [2020-10-14 23:45:35,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:35,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834419779] [2020-10-14 23:45:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:35,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:38,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:38,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-14 23:45:38,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:38,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2201 [2020-10-14 23:45:38,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:38,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:38,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-14 23:45:38,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:38,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-14 23:45:38,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:39,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:39,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:39,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:39,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:39,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:39,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:45:39,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:39,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:39,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:39,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:39,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:39,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:39,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834419779] [2020-10-14 23:45:39,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:39,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-14 23:45:39,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351906387] [2020-10-14 23:45:39,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-14 23:45:39,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:39,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-14 23:45:39,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 23:45:39,661 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 56 states. [2020-10-14 23:45:39,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:39,988 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-10-14 23:45:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-14 23:45:39,989 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 116 [2020-10-14 23:45:39,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:39,990 INFO L225 Difference]: With dead ends: 126 [2020-10-14 23:45:39,990 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 23:45:39,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 23:45:39,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 23:45:39,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-14 23:45:39,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 23:45:39,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2020-10-14 23:45:39,994 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2020-10-14 23:45:39,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:39,995 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2020-10-14 23:45:39,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-14 23:45:39,995 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2020-10-14 23:45:39,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-14 23:45:39,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:39,996 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:39,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 23:45:39,996 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:39,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:39,996 INFO L82 PathProgramCache]: Analyzing trace with hash -893901913, now seen corresponding path program 53 times [2020-10-14 23:45:39,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:39,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734978743] [2020-10-14 23:45:39,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:40,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:42,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:42,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 23:45:42,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:42,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2387 [2020-10-14 23:45:42,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:42,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:42,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-14 23:45:42,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:42,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-14 23:45:42,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:43,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:43,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:44,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:44,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:44,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:44,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:44,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:44,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:44,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:44,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:44,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:44,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:44,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734978743] [2020-10-14 23:45:44,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:44,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-14 23:45:44,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295891481] [2020-10-14 23:45:44,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-14 23:45:44,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:44,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-14 23:45:44,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 23:45:44,014 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 57 states. [2020-10-14 23:45:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:44,319 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-10-14 23:45:44,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-14 23:45:44,320 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 118 [2020-10-14 23:45:44,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:44,321 INFO L225 Difference]: With dead ends: 128 [2020-10-14 23:45:44,322 INFO L226 Difference]: Without dead ends: 122 [2020-10-14 23:45:44,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 23:45:44,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-14 23:45:44,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-14 23:45:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 23:45:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-10-14 23:45:44,328 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2020-10-14 23:45:44,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:44,329 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-10-14 23:45:44,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-14 23:45:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-10-14 23:45:44,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-14 23:45:44,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:44,331 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:44,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 23:45:44,331 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:44,332 INFO L82 PathProgramCache]: Analyzing trace with hash -887000887, now seen corresponding path program 54 times [2020-10-14 23:45:44,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:44,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65826254] [2020-10-14 23:45:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:44,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:47,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:47,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-14 23:45:47,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:47,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2713 [2020-10-14 23:45:47,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:47,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:47,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-14 23:45:47,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:47,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-14 23:45:47,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:48,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:48,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:48,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:48,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:48,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:48,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:48,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:48,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:48,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:48,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:48,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:48,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:48,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65826254] [2020-10-14 23:45:48,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:48,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-14 23:45:48,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235948237] [2020-10-14 23:45:48,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-14 23:45:48,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:48,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-14 23:45:48,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 23:45:48,761 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 58 states. [2020-10-14 23:45:49,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:49,109 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-10-14 23:45:49,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-14 23:45:49,110 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 120 [2020-10-14 23:45:49,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:49,112 INFO L225 Difference]: With dead ends: 130 [2020-10-14 23:45:49,112 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 23:45:49,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 23:45:49,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 23:45:49,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-14 23:45:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 23:45:49,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-10-14 23:45:49,124 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2020-10-14 23:45:49,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:49,124 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-10-14 23:45:49,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-14 23:45:49,124 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-10-14 23:45:49,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-14 23:45:49,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:49,128 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:49,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 23:45:49,128 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:49,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:49,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1449917803, now seen corresponding path program 55 times [2020-10-14 23:45:49,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:49,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120362693] [2020-10-14 23:45:49,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:49,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:52,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:52,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 23:45:52,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:52,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3153 [2020-10-14 23:45:52,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:52,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:52,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-14 23:45:52,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:52,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-14 23:45:52,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:54,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:54,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:54,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:54,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:54,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:54,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:54,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:54,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:54,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:54,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:54,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:54,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:54,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120362693] [2020-10-14 23:45:54,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:54,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-14 23:45:54,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147458647] [2020-10-14 23:45:54,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-14 23:45:54,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:54,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-14 23:45:54,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 23:45:54,059 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 59 states. [2020-10-14 23:45:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:54,288 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-10-14 23:45:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-14 23:45:54,289 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 122 [2020-10-14 23:45:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:54,290 INFO L225 Difference]: With dead ends: 132 [2020-10-14 23:45:54,290 INFO L226 Difference]: Without dead ends: 126 [2020-10-14 23:45:54,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 23:45:54,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-14 23:45:54,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-14 23:45:54,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-14 23:45:54,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-10-14 23:45:54,295 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2020-10-14 23:45:54,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:54,295 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-10-14 23:45:54,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-14 23:45:54,296 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-10-14 23:45:54,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 23:45:54,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:54,296 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:54,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 23:45:54,297 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:54,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:54,297 INFO L82 PathProgramCache]: Analyzing trace with hash 960883085, now seen corresponding path program 56 times [2020-10-14 23:45:54,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:54,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548669496] [2020-10-14 23:45:54,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:54,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:57,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:57,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 23:45:57,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:57,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2802 [2020-10-14 23:45:57,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:57,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:57,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-14 23:45:57,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:45:57,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-14 23:45:57,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:58,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:58,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:58,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:58,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:58,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:58,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:58,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:58,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:58,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:58,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:58,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:58,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:45:58,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548669496] [2020-10-14 23:45:58,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:58,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-14 23:45:58,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129003498] [2020-10-14 23:45:58,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-14 23:45:58,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:58,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-14 23:45:58,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 23:45:58,921 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 60 states. [2020-10-14 23:45:59,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:59,284 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-10-14 23:45:59,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-14 23:45:59,285 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 124 [2020-10-14 23:45:59,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:59,286 INFO L225 Difference]: With dead ends: 134 [2020-10-14 23:45:59,286 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 23:45:59,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 23:45:59,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 23:45:59,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-14 23:45:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-14 23:45:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-10-14 23:45:59,291 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2020-10-14 23:45:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:59,291 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-10-14 23:45:59,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-14 23:45:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-10-14 23:45:59,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-14 23:45:59,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:59,292 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:59,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 23:45:59,292 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:59,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:59,293 INFO L82 PathProgramCache]: Analyzing trace with hash -850045649, now seen corresponding path program 57 times [2020-10-14 23:45:59,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:59,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293236292] [2020-10-14 23:45:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:59,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:02,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:02,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 23:46:02,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:02,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2949 [2020-10-14 23:46:02,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:02,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:02,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-14 23:46:02,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:02,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-14 23:46:02,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:04,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:04,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:04,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:04,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:04,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:04,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:04,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:04,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:04,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:04,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:04,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:04,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:04,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293236292] [2020-10-14 23:46:04,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:04,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-14 23:46:04,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163387650] [2020-10-14 23:46:04,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-14 23:46:04,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:04,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-14 23:46:04,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 23:46:04,140 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 61 states. [2020-10-14 23:46:04,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:04,386 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-10-14 23:46:04,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-14 23:46:04,386 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 126 [2020-10-14 23:46:04,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:04,388 INFO L225 Difference]: With dead ends: 136 [2020-10-14 23:46:04,388 INFO L226 Difference]: Without dead ends: 130 [2020-10-14 23:46:04,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 23:46:04,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-14 23:46:04,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-14 23:46:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-14 23:46:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2020-10-14 23:46:04,393 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2020-10-14 23:46:04,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:04,393 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2020-10-14 23:46:04,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-14 23:46:04,394 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2020-10-14 23:46:04,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 23:46:04,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:04,395 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:04,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 23:46:04,395 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:04,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1690804143, now seen corresponding path program 58 times [2020-10-14 23:46:04,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:04,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961513558] [2020-10-14 23:46:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:04,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:07,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:07,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-14 23:46:07,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:07,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2992 [2020-10-14 23:46:07,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:07,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:07,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-14 23:46:07,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:07,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-14 23:46:07,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:09,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:09,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:09,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:09,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:09,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:09,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:09,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:09,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:09,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:09,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:09,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:09,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:09,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961513558] [2020-10-14 23:46:09,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:09,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-14 23:46:09,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810145421] [2020-10-14 23:46:09,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-14 23:46:09,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:09,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-14 23:46:09,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 23:46:09,370 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 62 states. [2020-10-14 23:46:09,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:09,722 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-10-14 23:46:09,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-14 23:46:09,723 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 128 [2020-10-14 23:46:09,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:09,724 INFO L225 Difference]: With dead ends: 138 [2020-10-14 23:46:09,724 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 23:46:09,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 23:46:09,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 23:46:09,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-14 23:46:09,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 23:46:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-10-14 23:46:09,729 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2020-10-14 23:46:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:09,729 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-10-14 23:46:09,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-14 23:46:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-10-14 23:46:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-14 23:46:09,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:09,730 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:09,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 23:46:09,731 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:09,731 INFO L82 PathProgramCache]: Analyzing trace with hash 2089102067, now seen corresponding path program 59 times [2020-10-14 23:46:09,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:09,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575207699] [2020-10-14 23:46:09,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:09,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:13,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:13,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-14 23:46:13,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:13,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3325 [2020-10-14 23:46:13,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:13,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:13,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-14 23:46:13,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:13,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-14 23:46:13,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:15,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:15,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:15,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:15,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:15,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:15,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:15,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:15,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:15,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:15,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:15,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:15,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:15,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575207699] [2020-10-14 23:46:15,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:15,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-14 23:46:15,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170846092] [2020-10-14 23:46:15,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-14 23:46:15,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:15,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-14 23:46:15,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 23:46:15,085 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 63 states. [2020-10-14 23:46:15,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:15,446 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2020-10-14 23:46:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-14 23:46:15,447 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 130 [2020-10-14 23:46:15,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:15,448 INFO L225 Difference]: With dead ends: 140 [2020-10-14 23:46:15,448 INFO L226 Difference]: Without dead ends: 134 [2020-10-14 23:46:15,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 23:46:15,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-14 23:46:15,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-14 23:46:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-14 23:46:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2020-10-14 23:46:15,453 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2020-10-14 23:46:15,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:15,453 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2020-10-14 23:46:15,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-14 23:46:15,453 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2020-10-14 23:46:15,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-14 23:46:15,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:15,454 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:15,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 23:46:15,455 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:15,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:15,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1036637461, now seen corresponding path program 60 times [2020-10-14 23:46:15,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:15,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134226910] [2020-10-14 23:46:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:15,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:18,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:18,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-14 23:46:18,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:18,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3386 [2020-10-14 23:46:18,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:18,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:18,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-14 23:46:18,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:18,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-14 23:46:18,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:20,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:20,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:20,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:20,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:20,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:20,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:20,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:20,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:20,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:20,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:20,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:20,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:20,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134226910] [2020-10-14 23:46:20,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:20,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-14 23:46:20,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125579997] [2020-10-14 23:46:20,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-14 23:46:20,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:20,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-14 23:46:20,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-14 23:46:20,973 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 64 states. [2020-10-14 23:46:21,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:21,233 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2020-10-14 23:46:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-14 23:46:21,234 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 132 [2020-10-14 23:46:21,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:21,235 INFO L225 Difference]: With dead ends: 142 [2020-10-14 23:46:21,235 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 23:46:21,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-14 23:46:21,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 23:46:21,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-14 23:46:21,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-14 23:46:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2020-10-14 23:46:21,242 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2020-10-14 23:46:21,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:21,243 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2020-10-14 23:46:21,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-14 23:46:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2020-10-14 23:46:21,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-14 23:46:21,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:21,244 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:21,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 23:46:21,244 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:21,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:21,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1064534345, now seen corresponding path program 61 times [2020-10-14 23:46:21,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:21,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669862685] [2020-10-14 23:46:21,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:21,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:24,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:24,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-14 23:46:24,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:24,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3439 [2020-10-14 23:46:24,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:24,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:24,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-14 23:46:24,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:24,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-14 23:46:24,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:26,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:26,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:26,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:26,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:26,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:26,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:26,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:26,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:26,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:26,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:26,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:26,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:26,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669862685] [2020-10-14 23:46:26,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:26,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-14 23:46:26,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257673034] [2020-10-14 23:46:26,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-14 23:46:26,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:26,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-14 23:46:26,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 23:46:26,861 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 65 states. [2020-10-14 23:46:27,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:27,262 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2020-10-14 23:46:27,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-14 23:46:27,263 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 134 [2020-10-14 23:46:27,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:27,264 INFO L225 Difference]: With dead ends: 144 [2020-10-14 23:46:27,264 INFO L226 Difference]: Without dead ends: 138 [2020-10-14 23:46:27,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 23:46:27,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-14 23:46:27,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-14 23:46:27,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-14 23:46:27,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-10-14 23:46:27,270 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2020-10-14 23:46:27,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:27,270 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-10-14 23:46:27,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-14 23:46:27,270 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-10-14 23:46:27,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-14 23:46:27,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:27,271 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:27,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 23:46:27,272 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:27,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:27,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1656010791, now seen corresponding path program 62 times [2020-10-14 23:46:27,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:27,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879027378] [2020-10-14 23:46:27,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:27,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:31,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:31,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 23:46:31,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:31,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3832 [2020-10-14 23:46:31,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:31,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:31,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-14 23:46:31,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:31,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-14 23:46:31,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:33,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:33,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:33,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:33,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:33,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:33,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:33,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:33,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:33,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:33,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:33,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:33,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:33,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879027378] [2020-10-14 23:46:33,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:33,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-14 23:46:33,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865378742] [2020-10-14 23:46:33,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-14 23:46:33,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:33,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-14 23:46:33,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 23:46:33,387 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 66 states. [2020-10-14 23:46:33,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:33,796 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-10-14 23:46:33,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-14 23:46:33,796 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 136 [2020-10-14 23:46:33,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:33,798 INFO L225 Difference]: With dead ends: 146 [2020-10-14 23:46:33,798 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 23:46:33,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 23:46:33,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 23:46:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-14 23:46:33,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 23:46:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-10-14 23:46:33,802 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2020-10-14 23:46:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:33,803 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-10-14 23:46:33,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-14 23:46:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-10-14 23:46:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-14 23:46:33,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:33,804 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:33,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-14 23:46:33,804 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:33,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:33,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1165774971, now seen corresponding path program 63 times [2020-10-14 23:46:33,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:33,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606548050] [2020-10-14 23:46:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:33,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:37,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:37,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-14 23:46:37,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:37,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3834 [2020-10-14 23:46:37,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:37,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:37,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-14 23:46:37,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:37,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-14 23:46:37,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:39,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:39,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:39,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:39,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:39,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:39,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:46:39,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:39,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:39,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:39,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:39,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:39,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:39,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606548050] [2020-10-14 23:46:39,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:39,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-14 23:46:39,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341952745] [2020-10-14 23:46:39,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-14 23:46:39,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:39,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-14 23:46:39,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-14 23:46:39,994 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 67 states. [2020-10-14 23:46:40,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:40,424 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2020-10-14 23:46:40,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-14 23:46:40,425 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 138 [2020-10-14 23:46:40,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:40,426 INFO L225 Difference]: With dead ends: 148 [2020-10-14 23:46:40,426 INFO L226 Difference]: Without dead ends: 142 [2020-10-14 23:46:40,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-14 23:46:40,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-14 23:46:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-14 23:46:40,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-14 23:46:40,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2020-10-14 23:46:40,431 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2020-10-14 23:46:40,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:40,431 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2020-10-14 23:46:40,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-14 23:46:40,431 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2020-10-14 23:46:40,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-14 23:46:40,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:40,432 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:40,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-14 23:46:40,433 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:40,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:40,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1517438819, now seen corresponding path program 64 times [2020-10-14 23:46:40,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:40,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591694999] [2020-10-14 23:46:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:40,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:44,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:44,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-14 23:46:44,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:44,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4110 [2020-10-14 23:46:44,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:44,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:44,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-14 23:46:44,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:44,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-14 23:46:44,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:46,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:46,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:46,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:46,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:46,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:46,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:46,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:46,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:46,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:46,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:46,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:46,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:46,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591694999] [2020-10-14 23:46:46,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:46,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-14 23:46:46,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503786152] [2020-10-14 23:46:46,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-14 23:46:46,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:46,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-14 23:46:46,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-14 23:46:46,958 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 68 states. [2020-10-14 23:46:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:47,393 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2020-10-14 23:46:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-14 23:46:47,394 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 140 [2020-10-14 23:46:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:47,395 INFO L225 Difference]: With dead ends: 150 [2020-10-14 23:46:47,395 INFO L226 Difference]: Without dead ends: 144 [2020-10-14 23:46:47,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-14 23:46:47,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-14 23:46:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-14 23:46:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-14 23:46:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2020-10-14 23:46:47,400 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2020-10-14 23:46:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:47,400 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2020-10-14 23:46:47,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-14 23:46:47,401 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2020-10-14 23:46:47,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 23:46:47,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:47,402 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:47,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-14 23:46:47,402 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:47,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:47,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1189453887, now seen corresponding path program 65 times [2020-10-14 23:46:47,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:47,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725587349] [2020-10-14 23:46:47,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:47,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:51,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:51,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-14 23:46:51,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:51,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4112 [2020-10-14 23:46:51,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:51,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:51,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-14 23:46:51,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:51,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-14 23:46:51,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:53,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:53,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:53,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:53,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:53,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:53,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:53,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:53,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:53,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:53,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:53,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:53,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:46:53,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725587349] [2020-10-14 23:46:53,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:53,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-14 23:46:53,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851369021] [2020-10-14 23:46:53,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-14 23:46:53,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:53,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-14 23:46:53,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-14 23:46:53,991 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 69 states. [2020-10-14 23:46:54,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:54,433 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2020-10-14 23:46:54,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-14 23:46:54,433 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 142 [2020-10-14 23:46:54,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:54,435 INFO L225 Difference]: With dead ends: 152 [2020-10-14 23:46:54,435 INFO L226 Difference]: Without dead ends: 146 [2020-10-14 23:46:54,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-14 23:46:54,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-14 23:46:54,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-14 23:46:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-14 23:46:54,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2020-10-14 23:46:54,439 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2020-10-14 23:46:54,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:54,440 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2020-10-14 23:46:54,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-14 23:46:54,440 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2020-10-14 23:46:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-14 23:46:54,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:54,441 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:54,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-14 23:46:54,441 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:54,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:54,441 INFO L82 PathProgramCache]: Analyzing trace with hash -236837023, now seen corresponding path program 66 times [2020-10-14 23:46:54,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:54,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577365756] [2020-10-14 23:46:54,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:54,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:58,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:58,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-14 23:46:58,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:58,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4312 [2020-10-14 23:46:58,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:58,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:58,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-14 23:46:58,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:46:58,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-14 23:46:58,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:01,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:01,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:01,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:01,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:01,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:01,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:01,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:01,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:01,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:01,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:01,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:01,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:47:01,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577365756] [2020-10-14 23:47:01,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:01,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-14 23:47:01,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138677364] [2020-10-14 23:47:01,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-14 23:47:01,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:01,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-14 23:47:01,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-14 23:47:01,321 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 70 states. [2020-10-14 23:47:01,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:01,759 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2020-10-14 23:47:01,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-14 23:47:01,760 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 144 [2020-10-14 23:47:01,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:01,761 INFO L225 Difference]: With dead ends: 154 [2020-10-14 23:47:01,761 INFO L226 Difference]: Without dead ends: 148 [2020-10-14 23:47:01,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-14 23:47:01,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-14 23:47:01,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-14 23:47:01,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 23:47:01,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-10-14 23:47:01,767 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2020-10-14 23:47:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:01,767 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-10-14 23:47:01,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-14 23:47:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-10-14 23:47:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-14 23:47:01,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:01,769 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:01,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-14 23:47:01,769 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:01,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:01,769 INFO L82 PathProgramCache]: Analyzing trace with hash -807834109, now seen corresponding path program 67 times [2020-10-14 23:47:01,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:01,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670453919] [2020-10-14 23:47:01,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:01,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:06,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:06,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-14 23:47:06,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:06,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4496 [2020-10-14 23:47:06,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:06,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:06,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-14 23:47:06,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:47:06,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-14 23:47:06,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:08,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:08,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:08,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:08,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:08,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:08,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:08,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:08,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:08,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:08,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:08,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:08,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:47:08,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670453919] [2020-10-14 23:47:08,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:08,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-14 23:47:08,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382710361] [2020-10-14 23:47:08,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-14 23:47:08,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:08,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-14 23:47:08,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-14 23:47:08,926 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 71 states. [2020-10-14 23:47:09,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:09,386 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-10-14 23:47:09,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-14 23:47:09,386 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 146 [2020-10-14 23:47:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:09,388 INFO L225 Difference]: With dead ends: 156 [2020-10-14 23:47:09,388 INFO L226 Difference]: Without dead ends: 150 [2020-10-14 23:47:09,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-14 23:47:09,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-14 23:47:09,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-14 23:47:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-14 23:47:09,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2020-10-14 23:47:09,392 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2020-10-14 23:47:09,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:09,392 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2020-10-14 23:47:09,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-14 23:47:09,392 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2020-10-14 23:47:09,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-14 23:47:09,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:09,393 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:09,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-14 23:47:09,393 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:09,394 INFO L82 PathProgramCache]: Analyzing trace with hash 219780133, now seen corresponding path program 68 times [2020-10-14 23:47:09,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:09,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891459647] [2020-10-14 23:47:09,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:09,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:14,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:14,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-14 23:47:14,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:14,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4707 [2020-10-14 23:47:14,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:14,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:14,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-14 23:47:14,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:47:14,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-14 23:47:14,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:16,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:16,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:16,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:16,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:16,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:16,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:16,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:16,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:16,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:16,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:16,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:16,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:47:16,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891459647] [2020-10-14 23:47:16,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:16,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-14 23:47:16,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4750006] [2020-10-14 23:47:16,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-14 23:47:16,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:16,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-14 23:47:16,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-14 23:47:16,823 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 72 states. [2020-10-14 23:47:17,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:17,274 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2020-10-14 23:47:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-14 23:47:17,275 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 148 [2020-10-14 23:47:17,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:17,276 INFO L225 Difference]: With dead ends: 158 [2020-10-14 23:47:17,276 INFO L226 Difference]: Without dead ends: 152 [2020-10-14 23:47:17,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-14 23:47:17,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-14 23:47:17,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-14 23:47:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-14 23:47:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2020-10-14 23:47:17,281 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2020-10-14 23:47:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:17,281 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2020-10-14 23:47:17,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-14 23:47:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2020-10-14 23:47:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-14 23:47:17,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:17,283 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:17,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-14 23:47:17,283 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:17,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:17,283 INFO L82 PathProgramCache]: Analyzing trace with hash -85411385, now seen corresponding path program 69 times [2020-10-14 23:47:17,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:17,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910821357] [2020-10-14 23:47:17,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:17,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:22,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:22,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-14 23:47:22,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:22,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4840 [2020-10-14 23:47:22,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:22,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:22,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-14 23:47:22,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:47:22,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-14 23:47:22,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:24,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:24,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:24,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:24,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:24,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:24,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:24,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:24,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:24,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:24,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:24,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:24,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:47:24,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910821357] [2020-10-14 23:47:24,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:24,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-14 23:47:24,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330911408] [2020-10-14 23:47:24,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-14 23:47:24,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:24,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-14 23:47:24,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-14 23:47:24,963 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 73 states. [2020-10-14 23:47:25,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:25,258 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2020-10-14 23:47:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-14 23:47:25,259 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 150 [2020-10-14 23:47:25,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:25,260 INFO L225 Difference]: With dead ends: 160 [2020-10-14 23:47:25,260 INFO L226 Difference]: Without dead ends: 154 [2020-10-14 23:47:25,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-14 23:47:25,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-14 23:47:25,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-10-14 23:47:25,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-14 23:47:25,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-10-14 23:47:25,265 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2020-10-14 23:47:25,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:25,265 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-10-14 23:47:25,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-14 23:47:25,265 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-10-14 23:47:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-14 23:47:25,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:25,266 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:25,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-14 23:47:25,267 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:25,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:25,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1316684055, now seen corresponding path program 70 times [2020-10-14 23:47:25,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:25,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360095320] [2020-10-14 23:47:25,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:25,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:30,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:30,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-14 23:47:30,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:30,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-14 23:47:30,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:30,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:30,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-14 23:47:30,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:47:30,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-14 23:47:30,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:33,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:33,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:33,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:33,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:33,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:33,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:33,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:33,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:33,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:33,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:33,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:33,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:47:33,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360095320] [2020-10-14 23:47:33,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:33,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-14 23:47:33,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076380831] [2020-10-14 23:47:33,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-14 23:47:33,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:33,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-14 23:47:33,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-14 23:47:33,237 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 74 states. [2020-10-14 23:47:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:33,622 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2020-10-14 23:47:33,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-14 23:47:33,623 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 152 [2020-10-14 23:47:33,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:33,624 INFO L225 Difference]: With dead ends: 162 [2020-10-14 23:47:33,625 INFO L226 Difference]: Without dead ends: 156 [2020-10-14 23:47:33,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-14 23:47:33,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-14 23:47:33,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-10-14 23:47:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-14 23:47:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2020-10-14 23:47:33,629 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2020-10-14 23:47:33,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:33,629 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2020-10-14 23:47:33,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-14 23:47:33,629 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2020-10-14 23:47:33,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-14 23:47:33,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:33,630 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:33,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-14 23:47:33,630 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:33,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:33,630 INFO L82 PathProgramCache]: Analyzing trace with hash 841253771, now seen corresponding path program 71 times [2020-10-14 23:47:33,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:33,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699316147] [2020-10-14 23:47:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:33,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:38,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:38,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-14 23:47:38,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:38,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 23:47:38,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:38,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:38,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-14 23:47:38,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:47:38,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-14 23:47:38,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:41,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:41,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:41,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:41,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:41,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:41,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:41,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:41,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:41,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:41,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:41,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:41,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:47:41,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699316147] [2020-10-14 23:47:41,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:41,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-14 23:47:41,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106846861] [2020-10-14 23:47:41,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-14 23:47:41,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:41,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-14 23:47:41,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-14 23:47:41,701 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 75 states. [2020-10-14 23:47:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:42,201 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2020-10-14 23:47:42,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-14 23:47:42,202 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 154 [2020-10-14 23:47:42,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:42,204 INFO L225 Difference]: With dead ends: 164 [2020-10-14 23:47:42,204 INFO L226 Difference]: Without dead ends: 158 [2020-10-14 23:47:42,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-14 23:47:42,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-14 23:47:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-14 23:47:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-14 23:47:42,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-10-14 23:47:42,209 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2020-10-14 23:47:42,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:42,209 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-10-14 23:47:42,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-14 23:47:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-10-14 23:47:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-14 23:47:42,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:42,210 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:42,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-14 23:47:42,210 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:42,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:42,211 INFO L82 PathProgramCache]: Analyzing trace with hash 150300589, now seen corresponding path program 72 times [2020-10-14 23:47:42,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:42,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102648270] [2020-10-14 23:47:42,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:42,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:47,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:47,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-14 23:47:47,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:47,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 23:47:47,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:47,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:47,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-14 23:47:47,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:47:47,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-14 23:47:47,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:50,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:50,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:50,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:50,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:50,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:50,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:50,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:50,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:50,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:50,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:50,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:50,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:47:50,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102648270] [2020-10-14 23:47:50,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:50,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-14 23:47:50,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476885904] [2020-10-14 23:47:50,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-14 23:47:50,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:50,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-14 23:47:50,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2020-10-14 23:47:50,355 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 76 states. [2020-10-14 23:47:50,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:50,883 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-10-14 23:47:50,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-14 23:47:50,883 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 156 [2020-10-14 23:47:50,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:50,885 INFO L225 Difference]: With dead ends: 166 [2020-10-14 23:47:50,885 INFO L226 Difference]: Without dead ends: 160 [2020-10-14 23:47:50,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2020-10-14 23:47:50,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-14 23:47:50,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-10-14 23:47:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-14 23:47:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2020-10-14 23:47:50,888 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2020-10-14 23:47:50,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:50,889 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2020-10-14 23:47:50,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-14 23:47:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2020-10-14 23:47:50,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-14 23:47:50,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:50,889 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:50,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-14 23:47:50,890 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:50,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:50,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1864223567, now seen corresponding path program 73 times [2020-10-14 23:47:50,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:50,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161964488] [2020-10-14 23:47:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:50,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:55,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:55,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-14 23:47:55,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:55,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 23:47:55,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:55,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:55,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-14 23:47:55,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:47:55,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-14 23:47:55,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:59,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:59,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:59,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:59,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:59,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:59,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:59,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:59,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:59,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:59,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:59,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:59,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:47:59,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161964488] [2020-10-14 23:47:59,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:59,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-14 23:47:59,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224600070] [2020-10-14 23:47:59,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-14 23:47:59,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:59,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-14 23:47:59,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2020-10-14 23:47:59,113 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 77 states. [2020-10-14 23:47:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:59,572 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2020-10-14 23:47:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-14 23:47:59,573 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 158 [2020-10-14 23:47:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:59,574 INFO L225 Difference]: With dead ends: 168 [2020-10-14 23:47:59,574 INFO L226 Difference]: Without dead ends: 162 [2020-10-14 23:47:59,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2020-10-14 23:47:59,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-14 23:47:59,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-10-14 23:47:59,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-14 23:47:59,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2020-10-14 23:47:59,579 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2020-10-14 23:47:59,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:59,579 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2020-10-14 23:47:59,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-14 23:47:59,579 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2020-10-14 23:47:59,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-14 23:47:59,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:59,580 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:59,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-14 23:47:59,580 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:59,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:59,580 INFO L82 PathProgramCache]: Analyzing trace with hash -323236239, now seen corresponding path program 74 times [2020-10-14 23:47:59,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:59,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193068656] [2020-10-14 23:47:59,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:59,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:04,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:04,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-14 23:48:04,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:04,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 23:48:04,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:04,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:04,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-14 23:48:04,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:48:04,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-14 23:48:04,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:07,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:07,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:07,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:07,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:48:07,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:07,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:48:07,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:07,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:07,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:07,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:07,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:07,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:48:07,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193068656] [2020-10-14 23:48:07,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:07,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-14 23:48:07,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710676709] [2020-10-14 23:48:07,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-14 23:48:07,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:07,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-14 23:48:07,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2020-10-14 23:48:07,941 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 78 states. [2020-10-14 23:48:08,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:08,465 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2020-10-14 23:48:08,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-14 23:48:08,465 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 160 [2020-10-14 23:48:08,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:08,467 INFO L225 Difference]: With dead ends: 170 [2020-10-14 23:48:08,467 INFO L226 Difference]: Without dead ends: 164 [2020-10-14 23:48:08,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2020-10-14 23:48:08,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-14 23:48:08,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-10-14 23:48:08,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-14 23:48:08,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2020-10-14 23:48:08,472 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2020-10-14 23:48:08,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:08,473 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2020-10-14 23:48:08,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-14 23:48:08,473 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2020-10-14 23:48:08,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-14 23:48:08,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:08,474 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:08,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-14 23:48:08,474 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:08,475 INFO L82 PathProgramCache]: Analyzing trace with hash 2061865235, now seen corresponding path program 75 times [2020-10-14 23:48:08,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:08,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327800525] [2020-10-14 23:48:08,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:08,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:13,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:13,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-14 23:48:13,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:13,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 23:48:13,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:13,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:13,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 77 [2020-10-14 23:48:13,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:48:13,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-10-14 23:48:13,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0