/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=SHALLOWEST --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 language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:09:02,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:09:02,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:09:02,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:09:02,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:09:02,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:09:02,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:09:02,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:09:02,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:09:02,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:09:02,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:09:02,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:09:02,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:09:02,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:09:02,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:09:02,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:09:02,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:09:02,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:09:02,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:09:02,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:09:02,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:09:02,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:09:02,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:09:02,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:09:02,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:09:02,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:09:02,609 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:09:02,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:09:02,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:09:02,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 00:09:02,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:09:02,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:09:02,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:09:02,633 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 [2020-10-27 00:09:02,688 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:09:02,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:09:02,693 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:09:02,693 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:09:02,693 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:09:02,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:09:02,695 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:09:02,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:09:02,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:09:02,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:09:02,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:09:02,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:09:02,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:09:02,698 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:09:02,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:09:02,698 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:09:02,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:09:02,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:09:02,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:09:02,699 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:09:02,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:09:02,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:09:02,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:09:02,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:09:02,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:09:02,701 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:09:02,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:09:02,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:09:02,701 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:09:02,702 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:09:03,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:09:03,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:09:03,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:09:03,157 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:09:03,158 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:09:03,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label16.c [2020-10-27 00:09:03,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81fa3b54e/3921dc9608344b5b9c394dca8be02b0b/FLAGd32e18904 [2020-10-27 00:09:04,249 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:09:04,250 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label16.c [2020-10-27 00:09:04,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81fa3b54e/3921dc9608344b5b9c394dca8be02b0b/FLAGd32e18904 [2020-10-27 00:09:04,302 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81fa3b54e/3921dc9608344b5b9c394dca8be02b0b [2020-10-27 00:09:04,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:09:04,312 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:09:04,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:09:04,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:09:04,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:09:04,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:09:04" (1/1) ... [2020-10-27 00:09:04,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a6153b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:04, skipping insertion in model container [2020-10-27 00:09:04,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:09:04" (1/1) ... [2020-10-27 00:09:04,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:09:04,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:09:05,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:09:05,612 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:09:06,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:09:06,138 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:09:06,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:06 WrapperNode [2020-10-27 00:09:06,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:09:06,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:09:06,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:09:06,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:09:06,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:06" (1/1) ... [2020-10-27 00:09:06,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:06" (1/1) ... [2020-10-27 00:09:06,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:06" (1/1) ... [2020-10-27 00:09:06,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:06" (1/1) ... [2020-10-27 00:09:06,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:06" (1/1) ... [2020-10-27 00:09:06,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:06" (1/1) ... [2020-10-27 00:09:06,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:06" (1/1) ... [2020-10-27 00:09:06,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:09:06,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:09:06,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:09:06,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:09:06,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:06" (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 [2020-10-27 00:09:06,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:09:06,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:09:06,535 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:09:06,536 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:09:06,536 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:09:06,536 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:09:06,536 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:09:06,536 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:09:06,536 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:09:06,537 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:09:06,537 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:09:06,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:09:06,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:09:06,537 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:09:06,537 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:09:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:09:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:09:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:09:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:09:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:09:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:09:16,362 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:09:16,362 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:09:16,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:09:16 BoogieIcfgContainer [2020-10-27 00:09:16,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:09:16,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:09:16,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:09:16,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:09:16,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:09:04" (1/3) ... [2020-10-27 00:09:16,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0ba39e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:09:16, skipping insertion in model container [2020-10-27 00:09:16,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:09:06" (2/3) ... [2020-10-27 00:09:16,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0ba39e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:09:16, skipping insertion in model container [2020-10-27 00:09:16,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:09:16" (3/3) ... [2020-10-27 00:09:16,376 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label16.c [2020-10-27 00:09:16,390 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:09:16,397 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:09:16,413 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:09:16,449 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:09:16,449 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:09:16,449 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:09:16,449 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:09:16,450 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:09:16,450 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:09:16,450 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:09:16,450 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:09:16,484 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:09:16,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 00:09:16,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:09:16,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:09:16,495 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:09:16,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:09:16,502 INFO L82 PathProgramCache]: Analyzing trace with hash 911374562, now seen corresponding path program 1 times [2020-10-27 00:09:16,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:09:16,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039541071] [2020-10-27 00:09:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:09:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:16,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:17,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:17,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 00:09:17,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:17,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-27 00:09:17,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:17,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:09:17,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:09:17,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 00:09:17,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:09:17,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:09:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:17,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:17,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:17,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:09:17,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:17,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 00:09:17,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:17,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:09:17,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:09:17,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:09:17,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:09:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:09:17,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039541071] [2020-10-27 00:09:17,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:09:17,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:09:17,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408903026] [2020-10-27 00:09:17,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:09:17,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:09:17,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:09:17,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:09:17,662 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:09:33,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:09:33,062 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-27 00:09:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:09:33,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-27 00:09:33,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:09:33,092 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 00:09:33,093 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 00:09:33,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:09:33,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 00:09:33,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-27 00:09:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-27 00:09:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-27 00:09:33,245 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 32 [2020-10-27 00:09:33,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:09:33,248 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-27 00:09:33,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:09:33,249 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-27 00:09:33,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 00:09:33,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:09:33,258 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:09:33,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:09:33,259 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:09:33,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:09:33,260 INFO L82 PathProgramCache]: Analyzing trace with hash -402948670, now seen corresponding path program 1 times [2020-10-27 00:09:33,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:09:33,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175598711] [2020-10-27 00:09:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:09:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:33,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:33,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:34,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:34,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:34,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 00:09:34,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:09:34,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1314 [2020-10-27 00:09:34,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:34,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:09:34,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:09:34,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:09:34,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:09:34,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:09:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:34,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:34,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:34,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:09:34,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:34,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 00:09:34,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:34,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:09:34,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:09:34,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:09:34,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:09:34,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:09:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:34,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:35,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:35,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:09:35,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:35,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-27 00:09:35,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:35,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:09:35,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:09:35,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:09:35,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:09:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:09:35,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175598711] [2020-10-27 00:09:35,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:09:35,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:09:35,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304031043] [2020-10-27 00:09:35,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:09:35,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:09:35,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:09:35,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:09:35,241 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 7 states. [2020-10-27 00:09:50,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:09:50,558 INFO L93 Difference]: Finished difference Result 2466 states and 3913 transitions. [2020-10-27 00:09:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:09:50,560 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 103 [2020-10-27 00:09:50,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:09:50,570 INFO L225 Difference]: With dead ends: 2466 [2020-10-27 00:09:50,571 INFO L226 Difference]: Without dead ends: 1480 [2020-10-27 00:09:50,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:09:50,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2020-10-27 00:09:50,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1442. [2020-10-27 00:09:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2020-10-27 00:09:50,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 1871 transitions. [2020-10-27 00:09:50,653 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 1871 transitions. Word has length 103 [2020-10-27 00:09:50,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:09:50,654 INFO L481 AbstractCegarLoop]: Abstraction has 1442 states and 1871 transitions. [2020-10-27 00:09:50,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:09:50,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 1871 transitions. [2020-10-27 00:09:50,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 00:09:50,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:09:50,667 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:09:50,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:09:50,667 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:09:50,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:09:50,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1151467633, now seen corresponding path program 1 times [2020-10-27 00:09:50,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:09:50,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998431164] [2020-10-27 00:09:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:09:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:50,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:51,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:51,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 00:09:51,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:51,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 794 [2020-10-27 00:09:51,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:51,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:09:51,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:09:51,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-27 00:09:51,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:09:51,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:09:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:51,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:51,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:51,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:09:51,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:51,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 00:09:51,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:51,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:09:51,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:09:51,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:09:51,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:09:51,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:09:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:51,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:52,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:52,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:09:52,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:52,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-27 00:09:52,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:52,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:09:52,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:09:52,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:09:52,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:09:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:09:52,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998431164] [2020-10-27 00:09:52,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:09:52,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:09:52,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315031735] [2020-10-27 00:09:52,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:09:52,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:09:52,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:09:52,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:09:52,361 INFO L87 Difference]: Start difference. First operand 1442 states and 1871 transitions. Second operand 8 states. [2020-10-27 00:09:58,531 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 00:10:13,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:10:13,335 INFO L93 Difference]: Finished difference Result 3448 states and 4718 transitions. [2020-10-27 00:10:13,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:10:13,338 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2020-10-27 00:10:13,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:10:13,350 INFO L225 Difference]: With dead ends: 3448 [2020-10-27 00:10:13,351 INFO L226 Difference]: Without dead ends: 1993 [2020-10-27 00:10:13,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:10:13,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2020-10-27 00:10:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1939. [2020-10-27 00:10:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1939 states. [2020-10-27 00:10:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 2485 transitions. [2020-10-27 00:10:13,433 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 2485 transitions. Word has length 106 [2020-10-27 00:10:13,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:10:13,434 INFO L481 AbstractCegarLoop]: Abstraction has 1939 states and 2485 transitions. [2020-10-27 00:10:13,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:10:13,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 2485 transitions. [2020-10-27 00:10:13,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-27 00:10:13,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:10:13,438 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:10:13,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:10:13,439 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:10:13,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:10:13,440 INFO L82 PathProgramCache]: Analyzing trace with hash 435562007, now seen corresponding path program 1 times [2020-10-27 00:10:13,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:10:13,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799828318] [2020-10-27 00:10:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:10:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:13,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:13,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:15,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:15,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-27 00:10:15,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:10:15,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1697 [2020-10-27 00:10:15,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:15,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:10:15,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:10:15,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 00:10:15,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:10:15,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:10:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:15,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:15,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:15,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:10:15,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:15,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 00:10:15,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:15,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:10:15,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:10:15,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:10:15,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:15,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:10:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:15,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:15,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:15,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:10:15,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:15,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-27 00:10:15,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:15,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:10:15,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:10:15,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:10:15,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:15,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:10:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:15,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:15,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:15,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 00:10:15,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:15,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-27 00:10:15,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:15,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:10:15,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:10:15,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 00:10:15,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:10:15,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799828318] [2020-10-27 00:10:15,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:10:15,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:10:15,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773382206] [2020-10-27 00:10:15,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:10:15,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:10:15,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:10:15,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:10:15,922 INFO L87 Difference]: Start difference. First operand 1939 states and 2485 transitions. Second operand 7 states. [2020-10-27 00:10:32,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:10:32,240 INFO L93 Difference]: Finished difference Result 4385 states and 6014 transitions. [2020-10-27 00:10:32,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:10:32,242 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 189 [2020-10-27 00:10:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:10:32,260 INFO L225 Difference]: With dead ends: 4385 [2020-10-27 00:10:32,260 INFO L226 Difference]: Without dead ends: 2884 [2020-10-27 00:10:32,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:10:32,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2884 states. [2020-10-27 00:10:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2884 to 2850. [2020-10-27 00:10:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2850 states. [2020-10-27 00:10:32,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 3657 transitions. [2020-10-27 00:10:32,370 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 3657 transitions. Word has length 189 [2020-10-27 00:10:32,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:10:32,371 INFO L481 AbstractCegarLoop]: Abstraction has 2850 states and 3657 transitions. [2020-10-27 00:10:32,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:10:32,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 3657 transitions. [2020-10-27 00:10:32,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-27 00:10:32,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:10:32,375 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:10:32,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:10:32,376 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:10:32,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:10:32,376 INFO L82 PathProgramCache]: Analyzing trace with hash 490606778, now seen corresponding path program 1 times [2020-10-27 00:10:32,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:10:32,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786949553] [2020-10-27 00:10:32,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:10:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:32,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:32,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:35,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:36,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:37,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:37,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-27 00:10:37,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:10:37,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 00:10:37,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:37,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:10:37,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:10:37,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 199 [2020-10-27 00:10:37,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:37,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:10:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:37,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:37,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:37,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:10:37,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:37,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 00:10:37,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:37,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:10:37,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:10:37,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:10:37,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:37,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:10:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:37,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:37,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:37,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:10:37,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:37,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-27 00:10:37,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:10:37,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:10:37,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:10:37,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:38,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:10:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:38,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:38,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:38,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:38,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:10:38,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:10:38,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-27 00:10:38,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:38,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:10:38,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:10:38,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:10:38,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:10:38,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786949553] [2020-10-27 00:10:38,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:10:38,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:10:38,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213639672] [2020-10-27 00:10:38,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:10:38,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:10:38,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:10:38,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:10:38,536 INFO L87 Difference]: Start difference. First operand 2850 states and 3657 transitions. Second operand 9 states. [2020-10-27 00:10:43,029 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 00:11:00,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:11:00,529 INFO L93 Difference]: Finished difference Result 7725 states and 10291 transitions. [2020-10-27 00:11:00,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:11:00,531 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 194 [2020-10-27 00:11:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:11:00,554 INFO L225 Difference]: With dead ends: 7725 [2020-10-27 00:11:00,555 INFO L226 Difference]: Without dead ends: 4862 [2020-10-27 00:11:00,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 00:11:00,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2020-10-27 00:11:00,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 4735. [2020-10-27 00:11:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4735 states. [2020-10-27 00:11:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 5782 transitions. [2020-10-27 00:11:00,694 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 5782 transitions. Word has length 194 [2020-10-27 00:11:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:11:00,695 INFO L481 AbstractCegarLoop]: Abstraction has 4735 states and 5782 transitions. [2020-10-27 00:11:00,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:11:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 5782 transitions. [2020-10-27 00:11:00,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-27 00:11:00,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:11:00,698 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:11:00,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:11:00,699 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:11:00,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:11:00,699 INFO L82 PathProgramCache]: Analyzing trace with hash -703866640, now seen corresponding path program 1 times [2020-10-27 00:11:00,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:11:00,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323838089] [2020-10-27 00:11:00,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:11:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:00,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:00,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:01,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:05,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:05,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-27 00:11:05,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:11:05,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 00:11:05,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:05,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:11:05,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:11:05,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-27 00:11:05,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:05,941 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:11:05,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:11:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:05,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:05,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:05,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:11:05,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:05,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 00:11:05,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:05,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:11:05,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:05,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:11:05,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:05,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:11:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:06,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:06,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:06,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:11:06,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:06,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-27 00:11:06,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:06,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:11:06,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:06,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:11:06,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:06,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:11:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:06,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:06,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:06,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:06,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:11:06,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:11:06,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-27 00:11:06,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:06,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:11:06,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:11:06,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:11:06,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 125 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:11:06,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323838089] [2020-10-27 00:11:06,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:11:06,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:11:06,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643463567] [2020-10-27 00:11:06,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:11:06,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:11:06,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:11:06,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:11:06,488 INFO L87 Difference]: Start difference. First operand 4735 states and 5782 transitions. Second operand 6 states. [2020-10-27 00:11:07,055 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:11:20,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:11:20,537 INFO L93 Difference]: Finished difference Result 9491 states and 11980 transitions. [2020-10-27 00:11:20,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 00:11:20,539 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 205 [2020-10-27 00:11:20,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:11:20,565 INFO L225 Difference]: With dead ends: 9491 [2020-10-27 00:11:20,565 INFO L226 Difference]: Without dead ends: 5197 [2020-10-27 00:11:20,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:11:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5197 states. [2020-10-27 00:11:20,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5197 to 5170. [2020-10-27 00:11:20,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5170 states. [2020-10-27 00:11:20,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5170 states to 5170 states and 6417 transitions. [2020-10-27 00:11:20,722 INFO L78 Accepts]: Start accepts. Automaton has 5170 states and 6417 transitions. Word has length 205 [2020-10-27 00:11:20,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:11:20,723 INFO L481 AbstractCegarLoop]: Abstraction has 5170 states and 6417 transitions. [2020-10-27 00:11:20,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:11:20,723 INFO L276 IsEmpty]: Start isEmpty. Operand 5170 states and 6417 transitions. [2020-10-27 00:11:20,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-10-27 00:11:20,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:11:20,728 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:11:20,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:11:20,729 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:11:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:11:20,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1108083188, now seen corresponding path program 1 times [2020-10-27 00:11:20,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:11:20,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488927264] [2020-10-27 00:11:20,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:11:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:20,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:20,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:21,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:22,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:24,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:24,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 292 [2020-10-27 00:11:24,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:11:24,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3736 [2020-10-27 00:11:24,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:24,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 00:11:24,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:11:24,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 283 [2020-10-27 00:11:24,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:24,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:11:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:24,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:24,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:24,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:11:24,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:24,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 00:11:24,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:24,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:11:24,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:24,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:11:24,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:24,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:11:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:24,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:25,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:25,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:11:25,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:25,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-27 00:11:25,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:25,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:11:25,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:11:25,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:11:25,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:11:25,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:11:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:25,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:25,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:25,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:11:25,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:25,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 00:11:25,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:25,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:11:25,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:11:25,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:11:25,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:25,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:11:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:25,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:25,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:25,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:11:25,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:25,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 00:11:25,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:25,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:11:25,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:11:25,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:11:25,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-27 00:11:25,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488927264] [2020-10-27 00:11:25,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:11:25,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:11:25,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239380147] [2020-10-27 00:11:25,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:11:25,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:11:25,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:11:25,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:11:25,829 INFO L87 Difference]: Start difference. First operand 5170 states and 6417 transitions. Second operand 9 states. [2020-10-27 00:11:26,712 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-27 00:11:34,161 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-27 00:11:49,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:11:49,351 INFO L93 Difference]: Finished difference Result 12921 states and 17400 transitions. [2020-10-27 00:11:49,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 00:11:49,354 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 276 [2020-10-27 00:11:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:11:49,415 INFO L225 Difference]: With dead ends: 12921 [2020-10-27 00:11:49,415 INFO L226 Difference]: Without dead ends: 7736 [2020-10-27 00:11:49,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-27 00:11:49,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7736 states. [2020-10-27 00:11:49,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7736 to 6971. [2020-10-27 00:11:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6971 states. [2020-10-27 00:11:49,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6971 states to 6971 states and 8444 transitions. [2020-10-27 00:11:49,688 INFO L78 Accepts]: Start accepts. Automaton has 6971 states and 8444 transitions. Word has length 276 [2020-10-27 00:11:49,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:11:49,689 INFO L481 AbstractCegarLoop]: Abstraction has 6971 states and 8444 transitions. [2020-10-27 00:11:49,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:11:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 6971 states and 8444 transitions. [2020-10-27 00:11:49,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-27 00:11:49,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:11:49,697 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:11:49,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:11:49,698 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:11:49,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:11:49,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1855819435, now seen corresponding path program 1 times [2020-10-27 00:11:49,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:11:49,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585089952] [2020-10-27 00:11:49,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:11:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:49,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:50,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:50,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:51,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:54,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:54,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-27 00:11:54,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:11:54,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 00:11:54,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:54,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:11:54,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:11:54,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 00:11:54,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:54,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:11:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:54,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:54,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:54,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:11:55,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:55,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 00:11:55,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:55,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:11:55,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:55,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:11:55,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:11:55,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:11:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:55,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:55,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:55,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:11:55,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:55,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-27 00:11:55,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:55,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:11:55,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:55,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:11:55,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:55,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:11:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:55,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:55,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:55,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:11:55,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:55,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-27 00:11:55,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:55,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:11:55,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:11:55,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:11:55,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:55,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-27 00:11:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:55,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:55,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:55,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:11:55,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:55,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 00:11:55,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:55,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:11:55,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:11:55,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:11:55,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 160 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-27 00:11:56,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585089952] [2020-10-27 00:11:56,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:11:56,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:11:56,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200759478] [2020-10-27 00:11:56,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:11:56,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:11:56,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:11:56,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:11:56,096 INFO L87 Difference]: Start difference. First operand 6971 states and 8444 transitions. Second operand 7 states. [2020-10-27 00:12:02,422 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-27 00:12:14,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:12:14,746 INFO L93 Difference]: Finished difference Result 15929 states and 19550 transitions. [2020-10-27 00:12:14,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:12:14,748 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 299 [2020-10-27 00:12:14,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:12:14,778 INFO L225 Difference]: With dead ends: 15929 [2020-10-27 00:12:14,778 INFO L226 Difference]: Without dead ends: 9399 [2020-10-27 00:12:14,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:12:14,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9399 states. [2020-10-27 00:12:14,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9399 to 9290. [2020-10-27 00:12:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9290 states. [2020-10-27 00:12:15,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9290 states to 9290 states and 11069 transitions. [2020-10-27 00:12:15,023 INFO L78 Accepts]: Start accepts. Automaton has 9290 states and 11069 transitions. Word has length 299 [2020-10-27 00:12:15,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:12:15,024 INFO L481 AbstractCegarLoop]: Abstraction has 9290 states and 11069 transitions. [2020-10-27 00:12:15,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:12:15,024 INFO L276 IsEmpty]: Start isEmpty. Operand 9290 states and 11069 transitions. [2020-10-27 00:12:15,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-27 00:12:15,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:12:15,035 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:12:15,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:12:15,035 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:12:15,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:12:15,036 INFO L82 PathProgramCache]: Analyzing trace with hash -165169803, now seen corresponding path program 1 times [2020-10-27 00:12:15,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:12:15,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313439359] [2020-10-27 00:12:15,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:12:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:15,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:15,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:15,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:20,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:20,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-27 00:12:20,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:12:20,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 00:12:20,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:12:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:12:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-10-27 00:12:20,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:20,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:12:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:20,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:20,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:20,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:12:20,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:20,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:12:20,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:20,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:12:20,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:12:20,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:12:20,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:20,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:12:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:20,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:20,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:20,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:12:20,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:20,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-27 00:12:20,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:20,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:12:20,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:12:20,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:12:20,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:20,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:12:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:20,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:21,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:21,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 00:12:21,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:21,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-27 00:12:21,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:21,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:12:21,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:12:21,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-27 00:12:21,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:21,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-10-27 00:12:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:21,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:21,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:21,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:12:21,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:21,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 00:12:21,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:21,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:12:21,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:12:21,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:12:21,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 80 proven. 222 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 00:12:21,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313439359] [2020-10-27 00:12:21,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:12:21,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 00:12:21,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222935950] [2020-10-27 00:12:21,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:12:21,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:12:21,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:12:21,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:12:21,611 INFO L87 Difference]: Start difference. First operand 9290 states and 11069 transitions. Second operand 10 states. [2020-10-27 00:12:21,820 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:12:22,984 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 00:12:30,006 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-27 00:12:30,722 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 70