/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/array-crafted/zero_sum2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:43:26,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:43:26,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:43:26,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:43:26,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:43:26,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:43:26,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:43:26,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:43:26,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:43:26,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:43:26,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:43:26,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:43:26,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:43:26,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:43:26,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:43:26,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:43:26,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:43:26,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:43:26,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:43:26,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:43:26,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:43:26,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:43:26,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:43:26,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:43:26,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:43:26,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:43:26,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:43:26,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:43:26,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:43:26,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:43:26,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:43:26,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:43:26,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:43:26,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:43:26,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:43:26,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:43:26,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:43:26,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:43:26,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:43:26,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:43:26,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:43:26,732 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 [2020-10-28 08:43:26,785 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:43:26,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:43:26,789 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:43:26,789 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:43:26,790 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:43:26,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:43:26,791 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:43:26,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:43:26,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:43:26,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:43:26,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:43:26,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:43:26,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:43:26,795 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:43:26,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:43:26,795 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:43:26,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:43:26,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:43:26,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:43:26,796 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:43:26,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:43:26,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:43:26,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:43:26,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:43:26,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:43:26,798 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:43:26,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:43:26,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:43:26,799 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:43:26,799 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:43:27,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:43:27,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:43:27,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:43:27,215 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:43:27,215 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:43:27,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum2.c [2020-10-28 08:43:27,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/140ef8246/c4d72b9669ce4df88b06dceb2d317a8b/FLAGa88f4e265 [2020-10-28 08:43:27,854 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:43:27,854 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum2.c [2020-10-28 08:43:27,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/140ef8246/c4d72b9669ce4df88b06dceb2d317a8b/FLAGa88f4e265 [2020-10-28 08:43:28,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/140ef8246/c4d72b9669ce4df88b06dceb2d317a8b [2020-10-28 08:43:28,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:43:28,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:43:28,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:43:28,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:43:28,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:43:28,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:43:28" (1/1) ... [2020-10-28 08:43:28,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6007c4c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:28, skipping insertion in model container [2020-10-28 08:43:28,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:43:28" (1/1) ... [2020-10-28 08:43:28,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:43:28,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:43:28,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:43:28,450 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:43:28,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:43:28,490 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:43:28,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:28 WrapperNode [2020-10-28 08:43:28,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:43:28,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:43:28,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:43:28,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:43:28,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:28" (1/1) ... [2020-10-28 08:43:28,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:28" (1/1) ... [2020-10-28 08:43:28,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:28" (1/1) ... [2020-10-28 08:43:28,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:28" (1/1) ... [2020-10-28 08:43:28,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:28" (1/1) ... [2020-10-28 08:43:28,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:28" (1/1) ... [2020-10-28 08:43:28,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:28" (1/1) ... [2020-10-28 08:43:28,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:43:28,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:43:28,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:43:28,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:43:28,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:28" (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 [2020-10-28 08:43:28,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:43:28,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:43:28,620 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:43:28,620 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 08:43:28,621 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:43:28,621 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:43:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:43:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:43:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:43:28,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:43:28,622 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 08:43:28,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:43:28,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-28 08:43:28,623 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:43:28,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:43:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:43:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:43:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:43:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:43:28,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:43:28,962 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:43:28,963 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-28 08:43:28,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:43:28 BoogieIcfgContainer [2020-10-28 08:43:28,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:43:28,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:43:28,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:43:28,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:43:28,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:43:28" (1/3) ... [2020-10-28 08:43:28,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31692a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:43:28, skipping insertion in model container [2020-10-28 08:43:28,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:28" (2/3) ... [2020-10-28 08:43:28,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31692a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:43:28, skipping insertion in model container [2020-10-28 08:43:28,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:43:28" (3/3) ... [2020-10-28 08:43:28,977 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum2.c [2020-10-28 08:43:28,994 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:43:29,000 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:43:29,026 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:43:29,099 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:43:29,099 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:43:29,100 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:43:29,100 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:43:29,100 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:43:29,100 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:43:29,100 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:43:29,101 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:43:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-28 08:43:29,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:43:29,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:29,162 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] [2020-10-28 08:43:29,163 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:29,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:29,178 INFO L82 PathProgramCache]: Analyzing trace with hash 994645046, now seen corresponding path program 1 times [2020-10-28 08:43:29,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:29,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682636228] [2020-10-28 08:43:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:29,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:29,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:29,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:29,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:29,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:29,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:30,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:30,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:43:30,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:43:30,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1176 [2020-10-28 08:43:30,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:30,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:30,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:30,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:43:30,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:30,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 08:43:30,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:30,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:30,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:30,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:30,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:30,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 08:43:30,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:30,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:30,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:30,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:30,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:30,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:43:30,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682636228] [2020-10-28 08:43:30,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:43:30,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:43:30,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108909881] [2020-10-28 08:43:30,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:43:30,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:30,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:43:30,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:43:30,803 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-28 08:43:30,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:30,961 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2020-10-28 08:43:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:43:30,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-28 08:43:30,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:30,972 INFO L225 Difference]: With dead ends: 64 [2020-10-28 08:43:30,972 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 08:43:30,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:43:30,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 08:43:31,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 08:43:31,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 08:43:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-28 08:43:31,039 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2020-10-28 08:43:31,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:31,040 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-28 08:43:31,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:43:31,040 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-28 08:43:31,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:43:31,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:31,043 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] [2020-10-28 08:43:31,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:43:31,044 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:31,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:31,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1044057278, now seen corresponding path program 1 times [2020-10-28 08:43:31,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:31,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119977894] [2020-10-28 08:43:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:31,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:31,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:31,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:31,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:31,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:31,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:32,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:32,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:43:32,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:43:32,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1116 [2020-10-28 08:43:32,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:32,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:32,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:43:32,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:43:32,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:43:32,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:32,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:32,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:32,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:32,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:32,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:32,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:43:32,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:32,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:32,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:32,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:32,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:32,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:43:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:43:32,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119977894] [2020-10-28 08:43:32,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:43:32,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 08:43:32,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498806073] [2020-10-28 08:43:32,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:43:32,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:32,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:43:32,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:43:32,353 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-10-28 08:43:32,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:32,560 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-28 08:43:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:43:32,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-28 08:43:32,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:32,563 INFO L225 Difference]: With dead ends: 50 [2020-10-28 08:43:32,563 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 08:43:32,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:43:32,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 08:43:32,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-10-28 08:43:32,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 08:43:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-28 08:43:32,585 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 21 [2020-10-28 08:43:32,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:32,586 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-28 08:43:32,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:43:32,586 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-28 08:43:32,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:43:32,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:32,588 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] [2020-10-28 08:43:32,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:43:32,589 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:32,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:32,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1372549430, now seen corresponding path program 1 times [2020-10-28 08:43:32,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:32,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121789742] [2020-10-28 08:43:32,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:32,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:32,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:32,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:32,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:32,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:33,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:34,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:34,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:34,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:34,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:34,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:37,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:37,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:43:37,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 08:43:37,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:43:37,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:37,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:37,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:43:37,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:43:37,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:43:37,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:37,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:37,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:37,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:37,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:37,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:37,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 08:43:37,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:37,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:37,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:37,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:37,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:37,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:43:37,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121789742] [2020-10-28 08:43:37,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:43:37,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:43:37,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098914749] [2020-10-28 08:43:37,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:43:37,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:37,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:43:37,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:43:37,709 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-10-28 08:43:37,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:37,828 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-28 08:43:37,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:43:37,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-28 08:43:37,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:37,831 INFO L225 Difference]: With dead ends: 55 [2020-10-28 08:43:37,831 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 08:43:37,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:43:37,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 08:43:37,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-28 08:43:37,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 08:43:37,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-28 08:43:37,848 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 29 [2020-10-28 08:43:37,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:37,849 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-28 08:43:37,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:43:37,850 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-28 08:43:37,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 08:43:37,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:37,852 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] [2020-10-28 08:43:37,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:43:37,853 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:37,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:37,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1458252852, now seen corresponding path program 1 times [2020-10-28 08:43:37,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:37,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698905142] [2020-10-28 08:43:37,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:37,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:37,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:37,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:37,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:38,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:38,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:39,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:39,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:39,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:39,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:39,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:42,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:42,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 08:43:42,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 08:43:42,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:43:42,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:42,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:42,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:43:42,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:43:42,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:43:42,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:42,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:42,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:42,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:42,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:42,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:42,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:43:42,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:42,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:42,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:42,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:42,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:42,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:43:42,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698905142] [2020-10-28 08:43:42,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:43:42,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:43:42,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688077483] [2020-10-28 08:43:42,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:43:42,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:42,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:43:42,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:43:42,978 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-28 08:43:43,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:43,164 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2020-10-28 08:43:43,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:43:43,164 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-28 08:43:43,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:43,166 INFO L225 Difference]: With dead ends: 58 [2020-10-28 08:43:43,166 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 08:43:43,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:43:43,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 08:43:43,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-28 08:43:43,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 08:43:43,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-28 08:43:43,175 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 31 [2020-10-28 08:43:43,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:43,175 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-28 08:43:43,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:43:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-28 08:43:43,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 08:43:43,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:43,177 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:43:43,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:43:43,177 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:43,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:43,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1341725356, now seen corresponding path program 2 times [2020-10-28 08:43:43,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:43,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409020122] [2020-10-28 08:43:43,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:43,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:43,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:43,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:43,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:44,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:44,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:44,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:45,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:45,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:45,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:45,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:46,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:47,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:47,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:47,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:48,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:48,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:48,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:48,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 08:43:48,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 08:43:48,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 08:43:48,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:48,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:48,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:43:48,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:43:48,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:43:48,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:48,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:48,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:48,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:48,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:48,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:48,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:43:48,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:48,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:48,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:48,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:48,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:48,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 08:43:48,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409020122] [2020-10-28 08:43:48,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:43:48,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:43:48,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018850945] [2020-10-28 08:43:48,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:43:48,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:48,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:43:48,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:43:48,294 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 5 states. [2020-10-28 08:43:48,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:48,421 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-28 08:43:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:43:48,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-10-28 08:43:48,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:48,423 INFO L225 Difference]: With dead ends: 72 [2020-10-28 08:43:48,423 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 08:43:48,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:43:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 08:43:48,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 08:43:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 08:43:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-28 08:43:48,440 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2020-10-28 08:43:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:48,440 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-28 08:43:48,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:43:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-28 08:43:48,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 08:43:48,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:48,444 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:43:48,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:43:48,444 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:48,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:48,445 INFO L82 PathProgramCache]: Analyzing trace with hash 736251862, now seen corresponding path program 3 times [2020-10-28 08:43:48,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:48,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152508069] [2020-10-28 08:43:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:48,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:48,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:48,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:49,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:50,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:51,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:51,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:51,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:52,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:52,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:52,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:52,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:52,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:53,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:53,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 08:43:53,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 08:43:53,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:43:53,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:53,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:53,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 08:43:53,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:43:53,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 08:43:53,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:54,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:54,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:55,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:55,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:55,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:55,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:43:55,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:55,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:55,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:55,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:55,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:55,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:43:55,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152508069] [2020-10-28 08:43:55,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:43:55,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 08:43:55,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135656121] [2020-10-28 08:43:55,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 08:43:55,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:55,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 08:43:55,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:43:55,030 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 28 states. [2020-10-28 08:43:55,502 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-10-28 08:43:56,139 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-28 08:43:56,649 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-28 08:43:56,903 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-28 08:43:57,337 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-28 08:43:57,902 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-28 08:43:58,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:58,636 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2020-10-28 08:43:58,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 08:43:58,637 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 41 [2020-10-28 08:43:58,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:58,641 INFO L225 Difference]: With dead ends: 89 [2020-10-28 08:43:58,642 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 08:43:58,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=358, Invalid=2092, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 08:43:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 08:43:58,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2020-10-28 08:43:58,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 08:43:58,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-10-28 08:43:58,678 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 41 [2020-10-28 08:43:58,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:58,680 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-10-28 08:43:58,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 08:43:58,680 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-10-28 08:43:58,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 08:43:58,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:58,682 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-28 08:43:58,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:43:58,682 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:58,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:58,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1812493672, now seen corresponding path program 4 times [2020-10-28 08:43:58,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:58,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844537312] [2020-10-28 08:43:58,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:58,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:58,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:58,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:58,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:03,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:03,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 08:44:03,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:44:03,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:44:03,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:03,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:03,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:44:03,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:03,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:44:03,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:03,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:03,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:03,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:03,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:03,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:03,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:44:03,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:03,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:03,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:03,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:03,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:03,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 08:44:03,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844537312] [2020-10-28 08:44:03,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:03,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:44:03,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265172825] [2020-10-28 08:44:03,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:44:03,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:03,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:44:03,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:44:03,864 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 10 states. [2020-10-28 08:44:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:04,170 INFO L93 Difference]: Finished difference Result 123 states and 139 transitions. [2020-10-28 08:44:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:44:04,171 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-28 08:44:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:04,173 INFO L225 Difference]: With dead ends: 123 [2020-10-28 08:44:04,173 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 08:44:04,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:44:04,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 08:44:04,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-28 08:44:04,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 08:44:04,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-10-28 08:44:04,185 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 43 [2020-10-28 08:44:04,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:04,185 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-10-28 08:44:04,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:44:04,186 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-10-28 08:44:04,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 08:44:04,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:04,187 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-28 08:44:04,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:44:04,187 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:04,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:04,188 INFO L82 PathProgramCache]: Analyzing trace with hash -2026511334, now seen corresponding path program 5 times [2020-10-28 08:44:04,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:04,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652415302] [2020-10-28 08:44:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:04,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:04,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:04,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:04,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:04,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:06,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:09,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:09,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 08:44:09,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:44:09,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:44:09,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:09,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:09,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:44:09,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:09,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:44:09,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:09,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:09,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:09,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:09,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:09,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:09,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:44:09,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:09,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:09,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:09,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:09,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:09,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-28 08:44:09,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652415302] [2020-10-28 08:44:09,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:09,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:44:09,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574593054] [2020-10-28 08:44:09,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:44:09,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:09,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:44:09,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:44:09,327 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 10 states. [2020-10-28 08:44:09,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:09,672 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-28 08:44:09,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:44:09,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-28 08:44:09,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:09,674 INFO L225 Difference]: With dead ends: 87 [2020-10-28 08:44:09,674 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 08:44:09,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:44:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 08:44:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-28 08:44:09,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 08:44:09,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-28 08:44:09,684 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 45 [2020-10-28 08:44:09,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:09,684 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-28 08:44:09,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:44:09,684 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-28 08:44:09,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 08:44:09,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:09,685 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:44:09,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:44:09,686 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:09,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:09,686 INFO L82 PathProgramCache]: Analyzing trace with hash -491190432, now seen corresponding path program 6 times [2020-10-28 08:44:09,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:09,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066845198] [2020-10-28 08:44:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:09,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:10,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:10,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:11,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:11,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:12,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:13,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:13,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:14,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:14,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:14,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:14,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 08:44:14,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 08:44:14,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:44:14,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:14,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:14,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 08:44:14,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:14,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 08:44:14,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:44:17,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:17,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:17,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:17,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:17,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:17,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:44:17,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:17,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:17,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:17,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:17,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:17,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:44:17,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066845198] [2020-10-28 08:44:17,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:17,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 08:44:17,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527989976] [2020-10-28 08:44:17,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 08:44:17,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:17,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 08:44:17,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 08:44:17,076 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 33 states. [2020-10-28 08:44:18,126 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-28 08:44:18,390 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-10-28 08:44:18,763 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-28 08:44:19,178 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-28 08:44:20,520 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-10-28 08:44:20,914 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-28 08:44:21,765 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-28 08:44:21,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:21,934 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-10-28 08:44:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 08:44:21,935 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 51 [2020-10-28 08:44:21,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:21,937 INFO L225 Difference]: With dead ends: 100 [2020-10-28 08:44:21,937 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 08:44:21,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=331, Invalid=2975, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 08:44:21,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 08:44:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-28 08:44:21,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 08:44:21,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-10-28 08:44:21,954 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 51 [2020-10-28 08:44:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:21,955 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-10-28 08:44:21,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 08:44:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-10-28 08:44:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 08:44:21,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:21,956 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:44:21,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:44:21,957 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:21,957 INFO L82 PathProgramCache]: Analyzing trace with hash 844652514, now seen corresponding path program 7 times [2020-10-28 08:44:21,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:21,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341094475] [2020-10-28 08:44:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:21,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:22,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:22,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:22,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:26,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:26,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 08:44:26,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:44:26,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:44:26,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:26,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:26,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:44:26,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:26,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 08:44:26,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:27,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:27,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:27,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:27,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:27,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:27,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:44:27,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:27,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:27,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:27,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:27,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 08:44:27,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341094475] [2020-10-28 08:44:27,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:27,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:44:27,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489537076] [2020-10-28 08:44:27,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:44:27,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:27,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:44:27,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:44:27,125 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 12 states. [2020-10-28 08:44:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:27,557 INFO L93 Difference]: Finished difference Result 151 states and 169 transitions. [2020-10-28 08:44:27,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:44:27,557 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-28 08:44:27,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:27,559 INFO L225 Difference]: With dead ends: 151 [2020-10-28 08:44:27,559 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 08:44:27,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:44:27,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 08:44:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-28 08:44:27,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 08:44:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-10-28 08:44:27,587 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 53 [2020-10-28 08:44:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:27,587 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-10-28 08:44:27,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:44:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-10-28 08:44:27,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 08:44:27,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:27,589 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:44:27,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:44:27,589 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:27,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:27,594 INFO L82 PathProgramCache]: Analyzing trace with hash -832684316, now seen corresponding path program 8 times [2020-10-28 08:44:27,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:27,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942712174] [2020-10-28 08:44:27,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:27,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:27,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:27,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:27,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:27,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:31,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:32,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:32,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 08:44:32,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:44:32,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:44:32,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:32,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:32,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:44:32,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:32,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:44:32,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:32,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:32,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:32,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:32,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:32,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:32,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:44:32,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:32,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:32,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:32,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:32,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:32,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-28 08:44:32,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942712174] [2020-10-28 08:44:32,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:32,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:44:32,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220295598] [2020-10-28 08:44:32,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:44:32,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:32,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:44:32,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:44:32,762 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 12 states. [2020-10-28 08:44:33,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:33,151 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2020-10-28 08:44:33,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:44:33,151 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-28 08:44:33,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:33,152 INFO L225 Difference]: With dead ends: 109 [2020-10-28 08:44:33,152 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 08:44:33,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:44:33,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 08:44:33,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-28 08:44:33,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 08:44:33,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-28 08:44:33,165 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 55 [2020-10-28 08:44:33,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:33,166 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-28 08:44:33,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:44:33,166 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-28 08:44:33,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 08:44:33,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:33,167 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:44:33,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:44:33,168 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:33,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:33,168 INFO L82 PathProgramCache]: Analyzing trace with hash 370973290, now seen corresponding path program 9 times [2020-10-28 08:44:33,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:33,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863326205] [2020-10-28 08:44:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:33,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:33,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:34,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:35,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:35,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:36,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:36,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:37,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:37,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:38,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:38,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:38,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 08:44:38,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 08:44:38,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 08:44:38,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:38,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:38,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 08:44:38,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:38,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 08:44:38,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:40,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:40,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:40,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:40,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:40,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:40,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:44:40,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:40,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:40,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:40,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:40,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:40,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 08:44:40,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863326205] [2020-10-28 08:44:40,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:40,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 08:44:40,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258606045] [2020-10-28 08:44:40,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 08:44:40,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:40,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 08:44:40,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1318, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 08:44:40,509 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 38 states. [2020-10-28 08:44:41,636 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-28 08:44:42,277 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-28 08:44:43,679 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2020-10-28 08:44:44,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:44,978 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2020-10-28 08:44:44,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 08:44:44,979 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 61 [2020-10-28 08:44:44,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:44,980 INFO L225 Difference]: With dead ends: 100 [2020-10-28 08:44:44,981 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 08:44:44,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=222, Invalid=3084, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 08:44:44,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 08:44:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2020-10-28 08:44:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 08:44:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2020-10-28 08:44:44,995 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 61 [2020-10-28 08:44:44,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:44,996 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2020-10-28 08:44:44,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 08:44:44,996 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2020-10-28 08:44:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 08:44:44,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:44,997 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:44:44,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:44:44,998 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:44,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:44,998 INFO L82 PathProgramCache]: Analyzing trace with hash -974151636, now seen corresponding path program 10 times [2020-10-28 08:44:44,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:44,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238431743] [2020-10-28 08:44:44,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:45,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:45,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:45,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:46,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:50,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:50,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 08:44:50,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:44:50,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:44:50,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:50,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:50,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:44:50,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:50,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 08:44:50,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:50,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:50,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:50,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:50,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:50,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:50,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:44:50,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:50,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:50,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:50,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:50,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:50,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:44:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-28 08:44:50,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238431743] [2020-10-28 08:44:50,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:50,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:44:50,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953806246] [2020-10-28 08:44:50,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:44:50,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:50,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:44:50,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:44:50,241 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 14 states. [2020-10-28 08:44:50,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:50,938 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2020-10-28 08:44:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:44:50,939 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-28 08:44:50,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:50,940 INFO L225 Difference]: With dead ends: 168 [2020-10-28 08:44:50,940 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 08:44:50,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:44:50,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 08:44:50,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-28 08:44:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 08:44:50,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2020-10-28 08:44:50,971 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 63 [2020-10-28 08:44:50,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:50,972 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2020-10-28 08:44:50,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:44:50,972 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2020-10-28 08:44:50,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 08:44:50,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:50,975 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:44:50,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:44:50,976 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:50,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1093936302, now seen corresponding path program 11 times [2020-10-28 08:44:50,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:50,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17849550] [2020-10-28 08:44:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:51,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:51,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:51,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:52,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:52,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:56,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:56,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 08:44:56,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:44:56,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 08:44:56,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:56,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:56,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:44:56,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:56,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 08:44:56,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:56,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:56,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:56,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:56,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:56,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:56,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:44:56,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:56,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:56,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:56,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:56,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:56,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-28 08:44:56,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17849550] [2020-10-28 08:44:56,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:56,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:44:56,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784544499] [2020-10-28 08:44:56,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:44:56,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:56,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:44:56,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:44:56,209 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 14 states. [2020-10-28 08:44:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:56,703 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2020-10-28 08:44:56,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:44:56,704 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2020-10-28 08:44:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:56,705 INFO L225 Difference]: With dead ends: 123 [2020-10-28 08:44:56,705 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 08:44:56,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:44:56,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 08:44:56,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-28 08:44:56,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 08:44:56,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-28 08:44:56,722 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 65 [2020-10-28 08:44:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:56,724 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-28 08:44:56,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:44:56,724 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-28 08:44:56,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 08:44:56,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:56,728 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:44:56,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:44:56,729 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:56,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:56,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1467438860, now seen corresponding path program 12 times [2020-10-28 08:44:56,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:56,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037201157] [2020-10-28 08:44:56,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:56,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:57,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:58,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:59,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:00,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:00,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:01,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:01,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 08:45:01,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:45:01,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:45:01,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:01,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:01,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-28 08:45:01,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:45:01,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 08:45:01,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:02,813 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2020-10-28 08:45:02,985 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-28 08:45:04,351 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2020-10-28 08:45:04,562 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2020-10-28 08:45:04,966 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-10-28 08:45:07,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:45:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:07,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:07,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:07,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:45:07,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:45:07,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:45:07,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:07,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:07,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:45:07,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:45:07,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:45:07,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 08:45:07,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037201157] [2020-10-28 08:45:07,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:45:07,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-28 08:45:07,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750043235] [2020-10-28 08:45:07,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-28 08:45:07,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:45:07,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-28 08:45:07,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2189, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 08:45:07,803 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 49 states. [2020-10-28 08:45:08,347 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-28 08:45:08,847 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-10-28 08:45:09,111 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-28 08:45:10,481 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-28 08:45:12,875 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-28 08:45:13,399 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2020-10-28 08:45:14,002 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 08:45:14,554 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 82 [2020-10-28 08:45:15,004 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2020-10-28 08:45:15,335 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2020-10-28 08:45:15,606 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-28 08:45:15,892 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2020-10-28 08:45:16,146 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-10-28 08:45:16,383 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-28 08:45:19,720 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2020-10-28 08:45:20,250 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2020-10-28 08:45:20,538 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-28 08:45:21,112 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-28 08:45:21,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:45:21,657 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2020-10-28 08:45:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-28 08:45:21,658 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 71 [2020-10-28 08:45:21,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:45:21,659 INFO L225 Difference]: With dead ends: 120 [2020-10-28 08:45:21,659 INFO L226 Difference]: Without dead ends: 114 [2020-10-28 08:45:21,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=797, Invalid=8323, Unknown=0, NotChecked=0, Total=9120 [2020-10-28 08:45:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-28 08:45:21,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2020-10-28 08:45:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 08:45:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2020-10-28 08:45:21,679 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 71 [2020-10-28 08:45:21,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:45:21,680 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2020-10-28 08:45:21,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-28 08:45:21,680 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2020-10-28 08:45:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 08:45:21,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:45:21,682 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:45:21,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:45:21,683 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:45:21,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:45:21,683 INFO L82 PathProgramCache]: Analyzing trace with hash -341883850, now seen corresponding path program 13 times [2020-10-28 08:45:21,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:45:21,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597894999] [2020-10-28 08:45:21,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:45:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:21,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:21,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:21,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:23,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:26,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:26,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 08:45:26,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:45:26,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:45:26,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:26,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:26,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:45:26,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:45:26,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 08:45:26,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:26,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:45:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:26,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:26,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:26,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:45:26,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:45:26,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:45:26,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:26,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:26,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:45:26,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:45:26,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:45:26,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-28 08:45:26,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597894999] [2020-10-28 08:45:26,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:45:26,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:45:26,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010526854] [2020-10-28 08:45:26,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:45:26,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:45:26,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:45:26,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:45:26,952 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 16 states. [2020-10-28 08:45:27,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:45:27,726 INFO L93 Difference]: Finished difference Result 196 states and 210 transitions. [2020-10-28 08:45:27,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:45:27,728 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-28 08:45:27,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:45:27,729 INFO L225 Difference]: With dead ends: 196 [2020-10-28 08:45:27,729 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 08:45:27,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:45:27,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 08:45:27,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-28 08:45:27,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-28 08:45:27,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2020-10-28 08:45:27,745 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 73 [2020-10-28 08:45:27,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:45:27,745 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2020-10-28 08:45:27,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:45:27,745 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2020-10-28 08:45:27,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 08:45:27,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:45:27,746 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:45:27,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:45:27,746 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:45:27,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:45:27,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1439592904, now seen corresponding path program 14 times [2020-10-28 08:45:27,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:45:27,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911686360] [2020-10-28 08:45:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:45:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:27,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:27,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:27,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:29,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:29,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:31,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:32,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:32,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 08:45:32,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:45:32,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:45:32,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:32,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:32,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:45:32,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:45:32,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 08:45:32,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:32,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:45:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:32,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:32,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:32,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:45:32,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:45:32,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:45:32,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:32,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:45:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:45:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:45:32,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-28 08:45:33,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911686360] [2020-10-28 08:45:33,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:45:33,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:45:33,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103396567] [2020-10-28 08:45:33,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:45:33,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:45:33,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:45:33,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:45:33,008 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand 16 states. [2020-10-28 08:45:33,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:45:33,748 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2020-10-28 08:45:33,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:45:33,749 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-10-28 08:45:33,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:45:33,750 INFO L225 Difference]: With dead ends: 141 [2020-10-28 08:45:33,750 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 08:45:33,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:45:33,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 08:45:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-28 08:45:33,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 08:45:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-28 08:45:33,763 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 75 [2020-10-28 08:45:33,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:45:33,764 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-28 08:45:33,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:45:33,764 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-28 08:45:33,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 08:45:33,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:45:33,765 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:45:33,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:45:33,765 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:45:33,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:45:33,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2140089602, now seen corresponding path program 15 times [2020-10-28 08:45:33,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:45:33,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867466242] [2020-10-28 08:45:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:45:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:33,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:34,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:36,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:37,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:38,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:38,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 08:45:38,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:45:38,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 08:45:38,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:38,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:38,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-28 08:45:38,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:45:38,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 08:45:38,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:40,463 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-28 08:45:40,630 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-10-28 08:45:42,551 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-28 08:45:47,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:45:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:47,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:47,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:47,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:45:47,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:45:47,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:45:47,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:47,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:47,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:45:47,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:45:47,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:45:47,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:45:47,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867466242] [2020-10-28 08:45:47,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:45:47,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-28 08:45:47,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785730409] [2020-10-28 08:45:47,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-28 08:45:47,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:45:47,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-28 08:45:47,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=3597, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 08:45:47,248 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 63 states. [2020-10-28 08:45:48,113 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-28 08:45:48,447 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-28 08:45:49,792 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-28 08:45:50,522 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 58 [2020-10-28 08:45:50,913 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 54 [2020-10-28 08:45:51,375 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 49 [2020-10-28 08:45:52,653 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2020-10-28 08:45:53,194 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 78 [2020-10-28 08:45:53,641 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-28 08:45:53,993 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2020-10-28 08:45:54,320 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2020-10-28 08:45:54,805 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 75 [2020-10-28 08:45:55,109 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 36 [2020-10-28 08:45:55,430 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 39 [2020-10-28 08:45:55,856 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-10-28 08:45:56,449 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-28 08:45:56,934 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-28 08:45:58,360 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2020-10-28 08:45:59,233 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2020-10-28 08:45:59,727 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2020-10-28 08:46:00,264 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-10-28 08:46:00,741 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2020-10-28 08:46:01,188 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2020-10-28 08:46:03,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:46:03,454 INFO L93 Difference]: Finished difference Result 162 states and 172 transitions. [2020-10-28 08:46:03,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-28 08:46:03,457 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 81 [2020-10-28 08:46:03,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:46:03,459 INFO L225 Difference]: With dead ends: 162 [2020-10-28 08:46:03,459 INFO L226 Difference]: Without dead ends: 156 [2020-10-28 08:46:03,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=787, Invalid=8333, Unknown=0, NotChecked=0, Total=9120 [2020-10-28 08:46:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-28 08:46:03,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 129. [2020-10-28 08:46:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-28 08:46:03,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 137 transitions. [2020-10-28 08:46:03,479 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 137 transitions. Word has length 81 [2020-10-28 08:46:03,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:46:03,479 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 137 transitions. [2020-10-28 08:46:03,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-28 08:46:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 137 transitions. [2020-10-28 08:46:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 08:46:03,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:46:03,480 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:46:03,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:46:03,481 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:46:03,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:46:03,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1095482368, now seen corresponding path program 16 times [2020-10-28 08:46:03,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:46:03,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231128184] [2020-10-28 08:46:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:46:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:03,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:03,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:03,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:03,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:08,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:08,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 08:46:08,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:46:08,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:46:08,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:08,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:08,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:46:08,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:46:08,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 08:46:08,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:08,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:46:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:08,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:08,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:08,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:46:08,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:46:08,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:46:08,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:08,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:08,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:46:08,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:46:08,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:46:08,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-28 08:46:08,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231128184] [2020-10-28 08:46:08,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:46:08,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:46:08,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578678642] [2020-10-28 08:46:08,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:46:08,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:46:08,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:46:08,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:46:08,835 INFO L87 Difference]: Start difference. First operand 129 states and 137 transitions. Second operand 18 states. [2020-10-28 08:46:09,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:46:09,933 INFO L93 Difference]: Finished difference Result 210 states and 223 transitions. [2020-10-28 08:46:09,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:46:09,935 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2020-10-28 08:46:09,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:46:09,936 INFO L225 Difference]: With dead ends: 210 [2020-10-28 08:46:09,936 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 08:46:09,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:46:09,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 08:46:09,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-28 08:46:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 08:46:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-10-28 08:46:09,955 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 83 [2020-10-28 08:46:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:46:09,955 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-10-28 08:46:09,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:46:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-10-28 08:46:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 08:46:09,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:46:09,956 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:46:09,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:46:09,957 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:46:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:46:09,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2107767552, now seen corresponding path program 17 times [2020-10-28 08:46:09,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:46:09,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13523136] [2020-10-28 08:46:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:46:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:09,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:10,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:10,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:12,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:14,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:14,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 08:46:14,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:46:14,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:46:14,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:14,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:14,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:46:14,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:46:14,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 08:46:14,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:15,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:46:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:15,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:15,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:15,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:46:15,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:46:15,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:46:15,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:15,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:15,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:46:15,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:46:15,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:46:15,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-28 08:46:15,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13523136] [2020-10-28 08:46:15,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:46:15,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:46:15,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118331445] [2020-10-28 08:46:15,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:46:15,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:46:15,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:46:15,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:46:15,331 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 18 states. [2020-10-28 08:46:16,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:46:16,329 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-10-28 08:46:16,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:46:16,331 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2020-10-28 08:46:16,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:46:16,332 INFO L225 Difference]: With dead ends: 140 [2020-10-28 08:46:16,332 INFO L226 Difference]: Without dead ends: 92 [2020-10-28 08:46:16,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:46:16,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-28 08:46:16,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-28 08:46:16,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 08:46:16,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-10-28 08:46:16,345 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 83 [2020-10-28 08:46:16,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:46:16,345 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-10-28 08:46:16,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:46:16,345 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-10-28 08:46:16,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 08:46:16,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:46:16,346 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:46:16,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:46:16,346 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:46:16,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:46:16,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1916844168, now seen corresponding path program 18 times [2020-10-28 08:46:16,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:46:16,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270504612] [2020-10-28 08:46:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:46:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:16,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:17,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:19,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:20,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:21,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:21,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 08:46:21,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:46:21,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5167 [2020-10-28 08:46:21,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:21,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:21,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-28 08:46:21,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:46:21,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-28 08:46:21,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:23,364 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-28 08:46:23,590 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-28 08:46:23,998 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-28 08:46:24,219 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-28 08:46:24,435 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-10-28 08:46:24,656 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-28 08:46:24,896 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-28 08:46:25,126 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-28 08:46:25,378 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-28 08:46:25,859 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-28 08:46:26,132 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-28 08:46:26,388 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-10-28 08:46:26,688 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2020-10-28 08:46:26,979 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2020-10-28 08:46:27,273 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2020-10-28 08:46:27,521 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 22 [2020-10-28 08:46:27,923 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2020-10-28 08:46:28,344 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2020-10-28 08:46:28,691 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2020-10-28 08:46:29,074 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2020-10-28 08:46:29,470 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2020-10-28 08:46:29,867 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2020-10-28 08:46:30,218 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-28 08:46:30,573 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-10-28 08:46:30,913 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-28 08:46:31,256 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-28 08:46:31,601 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-28 08:46:31,938 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-28 08:46:32,232 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-28 08:46:32,627 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-10-28 08:46:32,946 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-28 08:46:33,260 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-28 08:46:33,569 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-10-28 08:46:33,875 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-10-28 08:46:34,194 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-10-28 08:46:34,513 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-10-28 08:46:34,817 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2020-10-28 08:46:36,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:46:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:36,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:36,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:36,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:46:36,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:46:36,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:46:36,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:36,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:36,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:46:36,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:46:36,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:46:36,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 60 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:46:36,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270504612] [2020-10-28 08:46:36,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:46:36,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-28 08:46:36,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598876633] [2020-10-28 08:46:36,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-28 08:46:36,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:46:36,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-28 08:46:36,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=523, Invalid=4447, Unknown=0, NotChecked=0, Total=4970 [2020-10-28 08:46:36,929 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 71 states. [2020-10-28 08:46:37,963 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 105 [2020-10-28 08:46:39,845 WARN L193 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 90 [2020-10-28 08:46:40,560 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2020-10-28 08:46:41,263 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-10-28 08:46:41,788 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2020-10-28 08:46:42,463 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2020-10-28 08:46:43,625 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2020-10-28 08:46:43,969 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-28 08:46:44,959 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-10-28 08:46:45,889 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 67 [2020-10-28 08:46:46,870 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-28 08:46:47,507 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-10-28 08:46:48,329 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 82 [2020-10-28 08:46:49,099 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 87 [2020-10-28 08:46:50,280 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 89 [2020-10-28 08:46:51,175 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 77 [2020-10-28 08:46:51,561 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-28 08:46:52,290 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-28 08:46:52,688 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-28 08:46:53,131 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-28 08:46:54,008 WARN L193 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-28 08:46:54,443 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-28 08:46:55,248 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2020-10-28 08:46:55,667 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-28 08:46:56,115 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2020-10-28 08:46:56,413 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2020-10-28 08:46:56,844 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-28 08:46:58,324 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 124 DAG size of output: 99 [2020-10-28 08:46:59,274 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2020-10-28 08:47:00,060 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 68 [2020-10-28 08:47:00,829 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-28 08:47:01,451 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 39 [2020-10-28 08:47:02,547 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 71 [2020-10-28 08:47:03,309 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 54 [2020-10-28 08:47:03,989 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2020-10-28 08:47:04,858 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 59 [2020-10-28 08:47:05,799 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 67 [2020-10-28 08:47:06,596 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46