/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/loops-crafted-1/mono-crafted_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:53:05,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:53:05,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:53:05,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:53:05,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:53:05,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:53:05,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:53:05,702 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:53:05,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:53:05,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:53:05,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:53:05,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:53:05,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:53:05,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:53:05,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:53:05,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:53:05,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:53:05,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:53:05,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:53:05,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:53:05,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:53:05,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:53:05,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:53:05,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:53:05,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:53:05,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:53:05,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:53:05,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:53:05,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:53:05,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:53:05,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:53:05,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:53:05,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:53:05,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:53:05,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:53:05,745 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:53:05,746 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:53:05,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:53:05,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:53:05,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:53:05,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:53:05,753 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 [2020-10-29 09:53:05,781 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:53:05,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:53:05,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:53:05,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:53:05,783 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:53:05,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:53:05,784 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:53:05,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:53:05,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:53:05,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:53:05,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:53:05,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:53:05,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:53:05,786 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:53:05,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:53:05,786 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:53:05,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:53:05,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:53:05,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:53:05,787 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:53:05,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:53:05,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:53:05,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:53:05,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:53:05,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:53:05,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:53:05,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:53:05,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:53:05,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:53:05,790 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:53:06,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:53:06,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:53:06,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:53:06,276 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:53:06,277 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:53:06,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2020-10-29 09:53:06,371 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a3f54623/4391369dac2b4f2e992b9a0e2e5694c3/FLAGc2654cc9f [2020-10-29 09:53:07,025 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:53:07,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2020-10-29 09:53:07,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a3f54623/4391369dac2b4f2e992b9a0e2e5694c3/FLAGc2654cc9f [2020-10-29 09:53:07,396 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a3f54623/4391369dac2b4f2e992b9a0e2e5694c3 [2020-10-29 09:53:07,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:53:07,406 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:53:07,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:53:07,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:53:07,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:53:07,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:53:07" (1/1) ... [2020-10-29 09:53:07,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a9b1c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:53:07, skipping insertion in model container [2020-10-29 09:53:07,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:53:07" (1/1) ... [2020-10-29 09:53:07,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:53:07,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:53:07,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:53:07,655 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:53:07,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:53:07,686 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:53:07,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:53:07 WrapperNode [2020-10-29 09:53:07,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:53:07,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:53:07,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:53:07,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:53:07,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:53:07" (1/1) ... [2020-10-29 09:53:07,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:53:07" (1/1) ... [2020-10-29 09:53:07,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:53:07" (1/1) ... [2020-10-29 09:53:07,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:53:07" (1/1) ... [2020-10-29 09:53:07,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:53:07" (1/1) ... [2020-10-29 09:53:07,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:53:07" (1/1) ... [2020-10-29 09:53:07,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:53:07" (1/1) ... [2020-10-29 09:53:07,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:53:07,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:53:07,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:53:07,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:53:07,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:53:07" (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 [2020-10-29 09:53:07,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:53:07,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:53:07,804 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:53:07,804 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:53:07,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:53:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:53:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:53:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:53:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:53:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:53:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:53:07,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:53:07,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:53:07,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:53:07,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:53:07,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:53:07,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:53:08,214 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:53:08,214 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:53:08,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:53:08 BoogieIcfgContainer [2020-10-29 09:53:08,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:53:08,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:53:08,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:53:08,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:53:08,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:53:07" (1/3) ... [2020-10-29 09:53:08,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f83e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:53:08, skipping insertion in model container [2020-10-29 09:53:08,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:53:07" (2/3) ... [2020-10-29 09:53:08,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f83e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:53:08, skipping insertion in model container [2020-10-29 09:53:08,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:53:08" (3/3) ... [2020-10-29 09:53:08,231 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2020-10-29 09:53:08,246 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:53:08,251 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:53:08,266 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:53:08,308 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:53:08,309 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:53:08,309 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:53:08,309 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:53:08,309 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:53:08,309 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:53:08,309 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:53:08,309 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:53:08,362 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-29 09:53:08,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:53:08,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:08,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:08,372 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:08,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:08,382 INFO L82 PathProgramCache]: Analyzing trace with hash 2071267928, now seen corresponding path program 1 times [2020-10-29 09:53:08,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:08,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176292927] [2020-10-29 09:53:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:08,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:08,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:08,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:53:08,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:08,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-29 09:53:08,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:08,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:08,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:08,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:53:08,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:08,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:53:08,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:08,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:08,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:08,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:08,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:08,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 09:53:08,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:08,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:08,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:08,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:08,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:08,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:53:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:08,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176292927] [2020-10-29 09:53:08,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:53:08,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 09:53:08,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870919646] [2020-10-29 09:53:08,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 09:53:08,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:08,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 09:53:08,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:53:08,943 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-10-29 09:53:09,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:09,007 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-29 09:53:09,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 09:53:09,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-29 09:53:09,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:09,017 INFO L225 Difference]: With dead ends: 39 [2020-10-29 09:53:09,017 INFO L226 Difference]: Without dead ends: 16 [2020-10-29 09:53:09,020 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 [2020-10-29 09:53:09,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-29 09:53:09,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-29 09:53:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-29 09:53:09,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-29 09:53:09,064 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2020-10-29 09:53:09,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:09,064 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-29 09:53:09,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 09:53:09,065 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-29 09:53:09,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:53:09,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:09,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:09,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:53:09,066 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:09,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:09,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1584572361, now seen corresponding path program 1 times [2020-10-29 09:53:09,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:09,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386999184] [2020-10-29 09:53:09,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:09,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:09,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:09,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:53:09,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:09,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-29 09:53:09,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:09,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:09,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:53:09,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:09,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:53:09,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:09,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:09,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:09,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:09,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:09,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:09,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:53:09,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:09,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:09,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:09,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:09,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:09,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:09,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386999184] [2020-10-29 09:53:09,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:53:09,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:53:09,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136651061] [2020-10-29 09:53:09,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:53:09,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:09,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:53:09,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:53:09,265 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2020-10-29 09:53:09,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:09,368 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-10-29 09:53:09,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:53:09,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-29 09:53:09,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:09,370 INFO L225 Difference]: With dead ends: 28 [2020-10-29 09:53:09,370 INFO L226 Difference]: Without dead ends: 18 [2020-10-29 09:53:09,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:53:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-29 09:53:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-29 09:53:09,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-29 09:53:09,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-29 09:53:09,379 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2020-10-29 09:53:09,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:09,380 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-29 09:53:09,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:53:09,380 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-29 09:53:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-29 09:53:09,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:09,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:09,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:53:09,382 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:09,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:09,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1703269908, now seen corresponding path program 1 times [2020-10-29 09:53:09,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:09,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909752089] [2020-10-29 09:53:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:09,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:09,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:09,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:53:09,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:09,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-29 09:53:09,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:09,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:09,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:53:09,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:53:09,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:53:09,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:09,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:09,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:09,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:09,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:09,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:09,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:53:09,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:09,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:09,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:09,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:09,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:09,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:09,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909752089] [2020-10-29 09:53:09,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:53:09,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:53:09,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333698484] [2020-10-29 09:53:09,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:53:09,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:09,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:53:09,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:53:09,508 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-10-29 09:53:09,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:09,591 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-10-29 09:53:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:53:09,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-29 09:53:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:09,592 INFO L225 Difference]: With dead ends: 31 [2020-10-29 09:53:09,593 INFO L226 Difference]: Without dead ends: 21 [2020-10-29 09:53:09,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:53:09,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-29 09:53:09,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-29 09:53:09,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-29 09:53:09,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-29 09:53:09,601 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2020-10-29 09:53:09,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:09,602 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-29 09:53:09,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:53:09,602 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-29 09:53:09,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:53:09,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:09,603 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:09,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:53:09,603 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:09,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1085784629, now seen corresponding path program 1 times [2020-10-29 09:53:09,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:09,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533521751] [2020-10-29 09:53:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:09,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:09,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:09,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:09,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:53:09,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:09,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-29 09:53:09,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:09,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:09,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:53:09,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:09,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:53:09,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:53:09,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:09,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:09,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:09,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:09,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:09,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:53:09,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:09,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:09,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:09,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:09,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:09,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:09,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533521751] [2020-10-29 09:53:09,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:09,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:53:09,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112072565] [2020-10-29 09:53:09,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:53:09,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:09,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:53:09,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:53:09,913 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2020-10-29 09:53:10,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:10,065 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-29 09:53:10,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:53:10,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-29 09:53:10,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:10,067 INFO L225 Difference]: With dead ends: 36 [2020-10-29 09:53:10,067 INFO L226 Difference]: Without dead ends: 23 [2020-10-29 09:53:10,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:53:10,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-29 09:53:10,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-29 09:53:10,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-29 09:53:10,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-29 09:53:10,079 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2020-10-29 09:53:10,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:10,079 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-29 09:53:10,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:53:10,079 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-29 09:53:10,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:53:10,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:10,081 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:10,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:53:10,084 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:10,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:10,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1091558936, now seen corresponding path program 2 times [2020-10-29 09:53:10,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:10,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136751761] [2020-10-29 09:53:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:10,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:10,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:10,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:10,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:53:10,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:10,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-29 09:53:10,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:10,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:10,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:53:10,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:10,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:53:10,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:10,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:10,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:10,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:10,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:10,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:10,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:53:10,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:10,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:10,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:10,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:10,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:10,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:10,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136751761] [2020-10-29 09:53:10,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:10,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:53:10,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146894088] [2020-10-29 09:53:10,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:53:10,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:10,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:53:10,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:53:10,416 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-10-29 09:53:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:10,742 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-10-29 09:53:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:53:10,743 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-29 09:53:10,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:10,744 INFO L225 Difference]: With dead ends: 38 [2020-10-29 09:53:10,744 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 09:53:10,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:53:10,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 09:53:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-29 09:53:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 09:53:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-29 09:53:10,752 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2020-10-29 09:53:10,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:10,752 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-29 09:53:10,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:53:10,753 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-29 09:53:10,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:53:10,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:10,754 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:10,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:53:10,754 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:10,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:10,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1949266629, now seen corresponding path program 3 times [2020-10-29 09:53:10,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:10,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312250849] [2020-10-29 09:53:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:10,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:10,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:10,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:10,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:53:10,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:10,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-29 09:53:10,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:10,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:10,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:53:10,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:10,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:53:10,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:11,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:11,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:11,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:11,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:11,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:11,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 09:53:11,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:11,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:11,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:11,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:11,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:11,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:11,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312250849] [2020-10-29 09:53:11,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:11,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:53:11,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284214450] [2020-10-29 09:53:11,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:53:11,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:11,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:53:11,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:53:11,037 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 7 states. [2020-10-29 09:53:11,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:11,309 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-10-29 09:53:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:53:11,311 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-29 09:53:11,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:11,312 INFO L225 Difference]: With dead ends: 40 [2020-10-29 09:53:11,312 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 09:53:11,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:53:11,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 09:53:11,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-29 09:53:11,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 09:53:11,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-29 09:53:11,320 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2020-10-29 09:53:11,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:11,321 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-29 09:53:11,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:53:11,321 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-29 09:53:11,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:53:11,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:11,322 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:11,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:53:11,322 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:11,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:11,323 INFO L82 PathProgramCache]: Analyzing trace with hash 690093982, now seen corresponding path program 4 times [2020-10-29 09:53:11,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:11,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263175014] [2020-10-29 09:53:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:11,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:11,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:11,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:11,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:53:11,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:11,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-29 09:53:11,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:11,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:11,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:53:11,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:11,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:53:11,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:11,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:11,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:11,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:11,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:11,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:11,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:53:11,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:11,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:11,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:11,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:11,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:11,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:11,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263175014] [2020-10-29 09:53:11,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:11,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:53:11,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383500583] [2020-10-29 09:53:11,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:53:11,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:11,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:53:11,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:53:11,663 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 8 states. [2020-10-29 09:53:11,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:11,912 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-29 09:53:11,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:53:11,913 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-29 09:53:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:11,913 INFO L225 Difference]: With dead ends: 42 [2020-10-29 09:53:11,914 INFO L226 Difference]: Without dead ends: 29 [2020-10-29 09:53:11,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:53:11,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-29 09:53:11,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-29 09:53:11,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:53:11,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-29 09:53:11,921 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2020-10-29 09:53:11,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:11,921 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-29 09:53:11,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:53:11,922 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-29 09:53:11,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:53:11,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:11,922 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:11,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:53:11,923 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:11,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:11,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1210030783, now seen corresponding path program 5 times [2020-10-29 09:53:11,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:11,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106836249] [2020-10-29 09:53:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:11,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:11,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:12,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:12,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:53:12,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:12,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-29 09:53:12,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:12,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:12,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:53:12,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:12,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:53:12,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:53:12,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:12,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:12,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:12,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:12,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:12,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:53:12,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:12,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:12,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:12,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:12,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:12,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:53:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:12,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106836249] [2020-10-29 09:53:12,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:12,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:53:12,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750095174] [2020-10-29 09:53:12,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:53:12,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:12,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:53:12,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:53:12,263 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2020-10-29 09:53:12,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:12,580 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-10-29 09:53:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:53:12,582 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-29 09:53:12,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:12,583 INFO L225 Difference]: With dead ends: 44 [2020-10-29 09:53:12,584 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 09:53:12,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:53:12,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 09:53:12,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-29 09:53:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 09:53:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-29 09:53:12,599 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 26 [2020-10-29 09:53:12,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:12,600 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-29 09:53:12,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:53:12,600 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-29 09:53:12,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:53:12,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:12,601 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:12,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:53:12,603 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:12,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:12,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1868829148, now seen corresponding path program 6 times [2020-10-29 09:53:12,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:12,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035682926] [2020-10-29 09:53:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:12,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:12,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:12,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:12,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:53:12,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:12,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-29 09:53:12,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:12,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:12,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:53:12,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:12,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:53:12,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:53:12,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:12,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:12,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:12,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:12,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:12,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:53:12,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:13,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:13,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:13,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:13,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:13,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:13,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035682926] [2020-10-29 09:53:13,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:13,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:53:13,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76068161] [2020-10-29 09:53:13,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:53:13,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:13,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:53:13,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:53:13,007 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 10 states. [2020-10-29 09:53:13,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:13,354 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-29 09:53:13,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:53:13,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-29 09:53:13,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:13,361 INFO L225 Difference]: With dead ends: 46 [2020-10-29 09:53:13,361 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 09:53:13,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:53:13,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 09:53:13,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-29 09:53:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:53:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-29 09:53:13,374 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 28 [2020-10-29 09:53:13,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:13,374 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-29 09:53:13,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:53:13,374 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-29 09:53:13,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:53:13,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:13,375 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:13,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:53:13,376 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:13,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:13,376 INFO L82 PathProgramCache]: Analyzing trace with hash 681101895, now seen corresponding path program 7 times [2020-10-29 09:53:13,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:13,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47718310] [2020-10-29 09:53:13,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:13,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:13,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:13,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:13,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:53:13,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:13,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-29 09:53:13,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:13,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:13,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:53:13,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:13,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:53:13,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:13,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:13,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:13,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:13,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:13,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:13,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:53:13,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:13,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:13,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:13,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:13,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:13,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:13,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47718310] [2020-10-29 09:53:13,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:13,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:53:13,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114712942] [2020-10-29 09:53:13,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:53:13,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:13,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:53:13,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:53:13,780 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-10-29 09:53:14,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:14,219 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-10-29 09:53:14,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:53:14,219 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-29 09:53:14,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:14,220 INFO L225 Difference]: With dead ends: 48 [2020-10-29 09:53:14,221 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 09:53:14,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:53:14,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 09:53:14,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-29 09:53:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 09:53:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-29 09:53:14,229 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 30 [2020-10-29 09:53:14,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:14,230 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-29 09:53:14,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:53:14,230 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-29 09:53:14,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:53:14,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:14,231 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:14,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:53:14,231 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:14,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:14,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1261491798, now seen corresponding path program 8 times [2020-10-29 09:53:14,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:14,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588238529] [2020-10-29 09:53:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:14,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:14,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:14,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:14,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:53:14,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:14,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-10-29 09:53:14,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:14,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:53:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:53:14,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:14,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:14,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:14,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:14,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:14,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:14,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:14,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:14,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:14,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:14,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:14,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:14,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:14,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588238529] [2020-10-29 09:53:14,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:14,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:53:14,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860314661] [2020-10-29 09:53:14,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:53:14,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:14,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:53:14,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:53:14,736 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 12 states. [2020-10-29 09:53:15,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:15,206 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-10-29 09:53:15,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:53:15,208 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-29 09:53:15,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:15,208 INFO L225 Difference]: With dead ends: 50 [2020-10-29 09:53:15,209 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 09:53:15,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:53:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 09:53:15,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-29 09:53:15,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:53:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-29 09:53:15,221 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 32 [2020-10-29 09:53:15,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:15,221 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-29 09:53:15,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:53:15,222 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-29 09:53:15,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:53:15,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:15,225 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:15,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:53:15,226 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:15,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:15,226 INFO L82 PathProgramCache]: Analyzing trace with hash 216742989, now seen corresponding path program 9 times [2020-10-29 09:53:15,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:15,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656575257] [2020-10-29 09:53:15,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:15,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:15,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:15,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:15,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:53:15,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:15,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-10-29 09:53:15,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:15,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:15,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:53:15,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:15,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:53:15,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:15,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:15,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:15,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:15,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:15,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:15,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:15,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:15,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:15,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:15,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:15,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:15,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:15,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656575257] [2020-10-29 09:53:15,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:15,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:53:15,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077986518] [2020-10-29 09:53:15,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:53:15,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:15,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:53:15,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:53:15,760 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 13 states. [2020-10-29 09:53:16,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:16,274 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-29 09:53:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:53:16,274 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-29 09:53:16,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:16,275 INFO L225 Difference]: With dead ends: 52 [2020-10-29 09:53:16,275 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:53:16,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:53:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:53:16,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-29 09:53:16,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 09:53:16,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-29 09:53:16,283 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 34 [2020-10-29 09:53:16,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:16,283 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-29 09:53:16,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:53:16,283 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-29 09:53:16,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:53:16,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:16,284 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:16,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:53:16,285 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:16,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:16,285 INFO L82 PathProgramCache]: Analyzing trace with hash -833801680, now seen corresponding path program 10 times [2020-10-29 09:53:16,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:16,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276006814] [2020-10-29 09:53:16,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:16,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:16,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:16,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:16,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:53:16,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:16,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-29 09:53:16,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:16,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:16,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:53:16,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:16,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:53:16,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:16,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:16,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:16,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:16,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:16,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:16,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:53:16,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:16,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:16,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:16,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:16,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:16,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:16,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276006814] [2020-10-29 09:53:16,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:16,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:53:16,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33030931] [2020-10-29 09:53:16,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:53:16,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:16,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:53:16,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:53:16,852 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 14 states. [2020-10-29 09:53:17,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:17,390 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-10-29 09:53:17,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:53:17,391 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-29 09:53:17,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:17,391 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:53:17,392 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 09:53:17,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:53:17,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 09:53:17,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-29 09:53:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:53:17,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-29 09:53:17,404 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 36 [2020-10-29 09:53:17,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:17,404 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-29 09:53:17,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:53:17,405 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-29 09:53:17,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:53:17,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:17,406 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:17,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:53:17,406 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:17,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:17,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1089914029, now seen corresponding path program 11 times [2020-10-29 09:53:17,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:17,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939245680] [2020-10-29 09:53:17,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:17,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:17,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:17,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:17,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:53:17,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:17,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-29 09:53:17,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:17,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:17,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:53:17,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:17,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:53:17,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:17,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:17,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:17,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:17,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:17,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:17,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:17,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:17,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:17,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:17,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:17,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:17,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:17,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939245680] [2020-10-29 09:53:17,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:17,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:53:17,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599050376] [2020-10-29 09:53:17,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:53:17,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:17,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:53:17,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:53:17,965 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 15 states. [2020-10-29 09:53:18,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:18,630 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-10-29 09:53:18,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:53:18,630 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-29 09:53:18,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:18,631 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:53:18,632 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:53:18,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:53:18,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:53:18,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-29 09:53:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:53:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-29 09:53:18,649 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 38 [2020-10-29 09:53:18,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:18,650 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-29 09:53:18,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:53:18,650 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-29 09:53:18,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:53:18,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:18,651 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:18,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:53:18,654 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:18,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:18,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1894221750, now seen corresponding path program 12 times [2020-10-29 09:53:18,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:18,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55005696] [2020-10-29 09:53:18,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:18,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:18,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:19,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:19,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:53:19,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:19,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-29 09:53:19,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:19,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:19,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:53:19,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:19,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:53:19,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:53:19,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:19,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:19,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:19,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:19,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:19,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:19,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:19,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:19,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:19,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:19,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:19,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:19,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55005696] [2020-10-29 09:53:19,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:19,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:53:19,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637792975] [2020-10-29 09:53:19,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:53:19,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:19,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:53:19,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:53:19,330 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 16 states. [2020-10-29 09:53:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:19,973 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-10-29 09:53:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:53:19,974 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-29 09:53:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:19,975 INFO L225 Difference]: With dead ends: 58 [2020-10-29 09:53:19,975 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:53:19,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:53:19,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:53:19,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-29 09:53:19,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:53:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-29 09:53:19,990 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 40 [2020-10-29 09:53:19,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:19,991 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-29 09:53:19,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:53:19,993 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-29 09:53:19,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:53:19,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:19,994 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:19,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:53:19,994 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:19,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:19,995 INFO L82 PathProgramCache]: Analyzing trace with hash 610551641, now seen corresponding path program 13 times [2020-10-29 09:53:19,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:19,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399138510] [2020-10-29 09:53:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:20,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:20,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:20,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:20,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:53:20,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:20,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-29 09:53:20,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:20,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:20,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:53:20,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:20,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:53:20,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:20,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:20,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:20,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:20,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:20,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:20,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:53:20,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:20,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:20,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:20,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399138510] [2020-10-29 09:53:20,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:20,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:53:20,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801740115] [2020-10-29 09:53:20,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:53:20,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:20,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:53:20,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:53:20,648 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 17 states. [2020-10-29 09:53:21,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:21,442 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-10-29 09:53:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:53:21,443 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-29 09:53:21,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:21,444 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:53:21,444 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 09:53:21,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:53:21,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 09:53:21,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-29 09:53:21,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:53:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-10-29 09:53:21,454 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 42 [2020-10-29 09:53:21,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:21,454 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-10-29 09:53:21,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:53:21,454 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-10-29 09:53:21,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:53:21,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:21,455 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:21,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:53:21,455 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:21,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:21,456 INFO L82 PathProgramCache]: Analyzing trace with hash -340809156, now seen corresponding path program 14 times [2020-10-29 09:53:21,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:21,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208829919] [2020-10-29 09:53:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:21,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:21,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:21,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:21,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:53:21,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:21,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-29 09:53:21,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:21,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:21,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:53:21,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:21,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:53:21,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:22,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:22,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:22,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:22,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:22,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:22,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:22,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:22,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:22,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:22,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:22,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:22,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:22,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208829919] [2020-10-29 09:53:22,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:22,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:53:22,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224293509] [2020-10-29 09:53:22,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:53:22,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:22,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:53:22,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:53:22,128 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 18 states. [2020-10-29 09:53:22,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:22,976 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-10-29 09:53:22,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:53:22,976 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-29 09:53:22,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:22,977 INFO L225 Difference]: With dead ends: 62 [2020-10-29 09:53:22,977 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:53:22,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:53:22,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:53:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-29 09:53:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:53:22,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-10-29 09:53:22,995 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 44 [2020-10-29 09:53:22,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:22,996 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-10-29 09:53:22,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:53:22,996 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-10-29 09:53:22,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:53:22,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:22,997 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:22,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:53:22,998 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:22,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:22,999 INFO L82 PathProgramCache]: Analyzing trace with hash 229498975, now seen corresponding path program 15 times [2020-10-29 09:53:22,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:22,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136307923] [2020-10-29 09:53:22,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:23,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:23,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:23,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:23,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:23,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:53:23,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:23,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-29 09:53:23,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:23,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:23,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:53:23,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:23,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:53:23,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:23,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:23,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:23,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:23,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:23,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:23,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:23,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:23,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:23,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:23,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:23,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:23,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:23,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136307923] [2020-10-29 09:53:23,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:23,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:53:23,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080972498] [2020-10-29 09:53:23,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:53:23,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:23,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:53:23,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:53:23,775 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 19 states. [2020-10-29 09:53:24,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:24,621 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-10-29 09:53:24,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:53:24,621 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-29 09:53:24,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:24,622 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:53:24,623 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 09:53:24,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:53:24,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 09:53:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-29 09:53:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-29 09:53:24,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-29 09:53:24,631 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 46 [2020-10-29 09:53:24,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:24,631 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-29 09:53:24,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:53:24,632 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-29 09:53:24,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:53:24,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:24,632 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:24,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:53:24,633 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:24,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:24,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1460201022, now seen corresponding path program 16 times [2020-10-29 09:53:24,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:24,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171773124] [2020-10-29 09:53:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:24,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:24,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:25,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:25,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:53:25,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:25,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 500 [2020-10-29 09:53:25,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:25,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:25,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:53:25,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:25,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:53:25,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:25,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:25,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:25,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:25,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:25,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:25,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:25,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:25,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:25,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:25,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:25,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:25,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:25,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171773124] [2020-10-29 09:53:25,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:25,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:53:25,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602881809] [2020-10-29 09:53:25,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:53:25,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:25,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:53:25,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:53:25,433 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 20 states. [2020-10-29 09:53:26,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:26,343 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-10-29 09:53:26,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:53:26,344 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-29 09:53:26,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:26,345 INFO L225 Difference]: With dead ends: 66 [2020-10-29 09:53:26,345 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:53:26,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:53:26,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:53:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-29 09:53:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 09:53:26,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-29 09:53:26,354 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 48 [2020-10-29 09:53:26,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:26,355 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-29 09:53:26,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:53:26,355 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-29 09:53:26,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:53:26,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:26,355 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:26,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:53:26,356 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:26,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:26,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1764260251, now seen corresponding path program 17 times [2020-10-29 09:53:26,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:26,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411270496] [2020-10-29 09:53:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:26,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:26,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:26,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:26,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:53:26,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:26,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-29 09:53:26,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:26,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:26,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:53:26,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:26,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:53:26,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:27,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:27,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:27,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:27,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:27,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:27,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:53:27,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:27,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:27,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:27,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:27,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:27,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:27,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411270496] [2020-10-29 09:53:27,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:27,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:53:27,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141868249] [2020-10-29 09:53:27,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:53:27,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:27,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:53:27,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:53:27,214 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 21 states. [2020-10-29 09:53:28,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:28,287 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2020-10-29 09:53:28,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:53:28,288 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-29 09:53:28,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:28,289 INFO L225 Difference]: With dead ends: 68 [2020-10-29 09:53:28,289 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:53:28,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:53:28,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:53:28,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-29 09:53:28,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 09:53:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-10-29 09:53:28,303 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 50 [2020-10-29 09:53:28,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:28,304 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-10-29 09:53:28,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:53:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-10-29 09:53:28,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:53:28,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:28,305 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:28,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:53:28,305 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:28,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:28,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1907403192, now seen corresponding path program 18 times [2020-10-29 09:53:28,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:28,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20153603] [2020-10-29 09:53:28,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:28,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:28,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:28,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:28,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:53:28,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:28,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-29 09:53:28,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:28,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:28,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:53:28,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:28,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:53:28,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:29,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:29,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:29,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:29,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:29,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:29,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:53:29,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:29,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:29,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:29,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:29,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:29,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:29,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20153603] [2020-10-29 09:53:29,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:29,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:53:29,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22867385] [2020-10-29 09:53:29,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:53:29,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:29,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:53:29,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:53:29,240 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 22 states. [2020-10-29 09:53:30,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:30,345 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-10-29 09:53:30,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:53:30,346 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-29 09:53:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:30,346 INFO L225 Difference]: With dead ends: 70 [2020-10-29 09:53:30,346 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 09:53:30,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:53:30,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 09:53:30,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-29 09:53:30,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 09:53:30,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-29 09:53:30,360 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 52 [2020-10-29 09:53:30,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:30,365 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-29 09:53:30,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:53:30,365 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-29 09:53:30,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:53:30,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:30,366 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:30,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:53:30,366 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:30,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:30,367 INFO L82 PathProgramCache]: Analyzing trace with hash -2028816021, now seen corresponding path program 19 times [2020-10-29 09:53:30,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:30,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525087464] [2020-10-29 09:53:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:30,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:30,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:30,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:30,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:53:30,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:30,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 575 [2020-10-29 09:53:30,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:30,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:30,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:53:30,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:30,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:53:30,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:31,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:31,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:31,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:31,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:31,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:31,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:31,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:31,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:31,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:31,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:31,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:31,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:31,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525087464] [2020-10-29 09:53:31,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:31,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:53:31,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963298940] [2020-10-29 09:53:31,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:53:31,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:31,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:53:31,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:53:31,312 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 23 states. [2020-10-29 09:53:32,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:32,496 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2020-10-29 09:53:32,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:53:32,500 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-29 09:53:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:32,501 INFO L225 Difference]: With dead ends: 72 [2020-10-29 09:53:32,501 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 09:53:32,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:53:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 09:53:32,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-29 09:53:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 09:53:32,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-29 09:53:32,509 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 54 [2020-10-29 09:53:32,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:32,510 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-29 09:53:32,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:53:32,510 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-29 09:53:32,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:53:32,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:32,510 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:32,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:53:32,511 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:32,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:32,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1552539598, now seen corresponding path program 20 times [2020-10-29 09:53:32,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:32,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89358094] [2020-10-29 09:53:32,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:32,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:32,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:33,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:33,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:53:33,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:33,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-29 09:53:33,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:33,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:33,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:53:33,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:33,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:53:33,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:33,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:33,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:33,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:33,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:33,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:33,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:33,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:33,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:33,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:33,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:33,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:33,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:33,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89358094] [2020-10-29 09:53:33,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:33,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:53:33,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152684474] [2020-10-29 09:53:33,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:53:33,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:33,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:53:33,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:53:33,534 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 24 states. [2020-10-29 09:53:34,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:34,860 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2020-10-29 09:53:34,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:53:34,863 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-29 09:53:34,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:34,863 INFO L225 Difference]: With dead ends: 74 [2020-10-29 09:53:34,863 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:53:34,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:53:34,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:53:34,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-29 09:53:34,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:53:34,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-29 09:53:34,869 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 56 [2020-10-29 09:53:34,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:34,870 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-29 09:53:34,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:53:34,870 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-29 09:53:34,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 09:53:34,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:34,870 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:34,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:53:34,871 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:34,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:34,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1328481935, now seen corresponding path program 21 times [2020-10-29 09:53:34,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:34,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834303948] [2020-10-29 09:53:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:34,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:34,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:35,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:35,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:53:35,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:35,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 616 [2020-10-29 09:53:35,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:35,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:35,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:53:35,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:35,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 09:53:35,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:35,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:35,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:35,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:35,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:35,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:35,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:35,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:35,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:35,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:35,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:35,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:35,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:35,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834303948] [2020-10-29 09:53:35,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:35,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:53:35,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257055724] [2020-10-29 09:53:35,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:53:35,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:35,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:53:35,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:53:35,944 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 25 states. [2020-10-29 09:53:37,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:37,253 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2020-10-29 09:53:37,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:53:37,253 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-29 09:53:37,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:37,254 INFO L225 Difference]: With dead ends: 76 [2020-10-29 09:53:37,254 INFO L226 Difference]: Without dead ends: 63 [2020-10-29 09:53:37,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:53:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-29 09:53:37,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-29 09:53:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-29 09:53:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-29 09:53:37,262 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 58 [2020-10-29 09:53:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:37,262 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-29 09:53:37,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:53:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-29 09:53:37,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:53:37,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:37,263 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:37,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:53:37,263 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:37,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:37,264 INFO L82 PathProgramCache]: Analyzing trace with hash 263730772, now seen corresponding path program 22 times [2020-10-29 09:53:37,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:37,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682495796] [2020-10-29 09:53:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:37,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:37,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:37,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:37,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:53:37,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:37,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 603 [2020-10-29 09:53:37,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:37,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:37,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:53:37,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:37,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 09:53:37,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:38,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:38,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:38,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:38,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:38,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:38,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:53:38,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:38,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:38,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:38,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:38,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:38,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:53:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:38,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682495796] [2020-10-29 09:53:38,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:38,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:53:38,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066396614] [2020-10-29 09:53:38,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:53:38,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:38,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:53:38,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:53:38,386 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 26 states. [2020-10-29 09:53:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:39,861 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2020-10-29 09:53:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:53:39,862 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-29 09:53:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:39,863 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:53:39,863 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 09:53:39,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:53:39,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 09:53:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-29 09:53:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-29 09:53:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-10-29 09:53:39,871 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 60 [2020-10-29 09:53:39,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:39,872 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-10-29 09:53:39,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:53:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-10-29 09:53:39,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:53:39,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:39,873 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:39,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:53:39,873 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:39,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:39,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1371784823, now seen corresponding path program 23 times [2020-10-29 09:53:39,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:39,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202847300] [2020-10-29 09:53:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:39,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:39,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:40,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:40,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 09:53:40,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:40,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 660 [2020-10-29 09:53:40,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:40,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:40,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:53:40,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:40,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 09:53:40,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:40,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:40,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:40,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:40,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:40,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:40,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:40,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:40,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:40,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:40,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:40,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:40,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:40,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202847300] [2020-10-29 09:53:40,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:40,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:53:40,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479991534] [2020-10-29 09:53:40,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:53:40,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:40,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:53:40,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:53:40,989 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 27 states. [2020-10-29 09:53:42,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:42,357 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2020-10-29 09:53:42,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:53:42,357 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-29 09:53:42,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:42,358 INFO L225 Difference]: With dead ends: 80 [2020-10-29 09:53:42,358 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 09:53:42,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:53:42,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 09:53:42,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-29 09:53:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 09:53:42,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-29 09:53:42,366 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 62 [2020-10-29 09:53:42,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:42,366 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-29 09:53:42,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:53:42,366 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-29 09:53:42,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 09:53:42,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:42,367 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:42,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:53:42,367 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:42,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:42,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1059838426, now seen corresponding path program 24 times [2020-10-29 09:53:42,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:42,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758265117] [2020-10-29 09:53:42,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:42,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:42,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:43,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:43,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 09:53:43,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:43,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-29 09:53:43,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:43,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:43,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:53:43,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:43,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 09:53:43,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:43,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:43,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:43,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:43,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:43,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:43,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:53:43,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:43,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:43,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:43,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:43,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:43,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:43,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758265117] [2020-10-29 09:53:43,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:43,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:53:43,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875863156] [2020-10-29 09:53:43,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:53:43,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:43,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:53:43,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:53:43,589 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 28 states. [2020-10-29 09:53:45,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:45,158 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2020-10-29 09:53:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:53:45,159 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-29 09:53:45,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:45,160 INFO L225 Difference]: With dead ends: 82 [2020-10-29 09:53:45,160 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 09:53:45,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:53:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 09:53:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-29 09:53:45,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-29 09:53:45,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-10-29 09:53:45,168 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 64 [2020-10-29 09:53:45,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:45,169 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-10-29 09:53:45,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:53:45,169 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-10-29 09:53:45,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 09:53:45,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:45,170 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:45,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:53:45,170 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:45,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:45,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1927061629, now seen corresponding path program 25 times [2020-10-29 09:53:45,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:45,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008705238] [2020-10-29 09:53:45,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:45,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:45,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:45,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:45,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 09:53:45,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:45,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 741 [2020-10-29 09:53:45,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:45,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:45,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:53:45,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:45,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 09:53:45,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:46,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:46,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:46,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:46,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:46,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:46,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:53:46,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:46,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:46,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:46,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:46,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:46,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:46,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008705238] [2020-10-29 09:53:46,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:46,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:53:46,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670527983] [2020-10-29 09:53:46,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:53:46,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:46,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:53:46,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:53:46,459 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 29 states. [2020-10-29 09:53:48,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:48,225 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-10-29 09:53:48,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:53:48,226 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-29 09:53:48,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:48,227 INFO L225 Difference]: With dead ends: 84 [2020-10-29 09:53:48,227 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 09:53:48,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:53:48,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 09:53:48,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-29 09:53:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 09:53:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-10-29 09:53:48,234 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 66 [2020-10-29 09:53:48,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:48,234 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-10-29 09:53:48,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:53:48,234 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-10-29 09:53:48,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 09:53:48,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:48,235 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:48,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:53:48,235 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:48,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:48,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2104904288, now seen corresponding path program 26 times [2020-10-29 09:53:48,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:48,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312718367] [2020-10-29 09:53:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:48,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:48,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:48,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:48,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 09:53:48,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:48,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-29 09:53:48,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:48,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:48,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:53:48,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:48,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 09:53:48,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:49,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:49,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:49,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:49,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:49,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:49,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:53:49,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:49,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:49,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:49,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:49,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:49,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:49,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312718367] [2020-10-29 09:53:49,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:49,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 09:53:49,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397221214] [2020-10-29 09:53:49,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 09:53:49,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:49,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 09:53:49,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:53:49,520 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 30 states. [2020-10-29 09:53:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:51,373 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2020-10-29 09:53:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:53:51,374 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-29 09:53:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:51,375 INFO L225 Difference]: With dead ends: 86 [2020-10-29 09:53:51,376 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 09:53:51,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 09:53:51,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 09:53:51,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-29 09:53:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 09:53:51,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-10-29 09:53:51,392 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 68 [2020-10-29 09:53:51,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:51,392 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-10-29 09:53:51,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 09:53:51,392 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-10-29 09:53:51,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 09:53:51,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:51,393 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:51,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:53:51,394 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:51,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:51,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1213007747, now seen corresponding path program 27 times [2020-10-29 09:53:51,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:51,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021532818] [2020-10-29 09:53:51,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:51,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:51,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:52,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:52,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 09:53:52,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:52,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 871 [2020-10-29 09:53:52,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:52,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:52,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 09:53:52,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:52,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 09:53:52,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:53:52,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:52,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:52,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:52,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:52,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:52,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:52,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:52,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:52,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:52,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:52,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:52,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:52,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021532818] [2020-10-29 09:53:52,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:52,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 09:53:52,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078654767] [2020-10-29 09:53:52,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 09:53:52,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:52,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 09:53:52,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:53:52,905 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 31 states. [2020-10-29 09:53:54,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:54,804 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2020-10-29 09:53:54,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:53:54,804 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-29 09:53:54,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:54,805 INFO L225 Difference]: With dead ends: 88 [2020-10-29 09:53:54,805 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 09:53:54,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-29 09:53:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 09:53:54,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-29 09:53:54,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 09:53:54,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-10-29 09:53:54,814 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 70 [2020-10-29 09:53:54,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:54,818 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-10-29 09:53:54,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 09:53:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-10-29 09:53:54,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:53:54,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:54,820 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:54,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:53:54,820 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:54,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:54,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1201076250, now seen corresponding path program 28 times [2020-10-29 09:53:54,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:54,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021457105] [2020-10-29 09:53:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:54,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:54,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:55,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:55,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 09:53:55,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:55,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 713 [2020-10-29 09:53:55,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:55,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:55,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 09:53:55,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:55,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 09:53:55,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:56,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:56,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:56,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:56,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:56,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:56,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:56,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:56,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:56,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:56,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:56,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:56,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:56,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021457105] [2020-10-29 09:53:56,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:56,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 09:53:56,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764625047] [2020-10-29 09:53:56,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 09:53:56,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:56,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 09:53:56,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:53:56,278 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 32 states. [2020-10-29 09:53:58,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:58,293 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2020-10-29 09:53:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:53:58,294 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-29 09:53:58,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:58,294 INFO L225 Difference]: With dead ends: 90 [2020-10-29 09:53:58,294 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 09:53:58,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 09:53:58,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 09:53:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-29 09:53:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 09:53:58,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-10-29 09:53:58,301 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 72 [2020-10-29 09:53:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:58,301 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-10-29 09:53:58,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 09:53:58,302 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-10-29 09:53:58,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 09:53:58,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:58,302 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:58,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:53:58,302 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:58,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:58,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1853457527, now seen corresponding path program 29 times [2020-10-29 09:53:58,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:58,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821013360] [2020-10-29 09:53:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:58,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:58,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:58,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:58,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 09:53:58,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:58,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 626 [2020-10-29 09:53:58,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:58,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:58,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 09:53:58,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:58,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 09:53:58,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:59,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:59,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:59,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:59,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:59,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:59,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:59,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:59,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:59,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:59,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:59,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:59,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:59,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821013360] [2020-10-29 09:53:59,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:59,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 09:53:59,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114970062] [2020-10-29 09:53:59,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 09:53:59,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:59,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 09:53:59,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:53:59,703 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 33 states. [2020-10-29 09:54:01,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:01,756 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2020-10-29 09:54:01,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:54:01,756 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-29 09:54:01,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:01,758 INFO L225 Difference]: With dead ends: 92 [2020-10-29 09:54:01,758 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 09:54:01,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-29 09:54:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 09:54:01,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-29 09:54:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-29 09:54:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-10-29 09:54:01,766 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 74 [2020-10-29 09:54:01,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:01,766 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-10-29 09:54:01,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 09:54:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-10-29 09:54:01,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 09:54:01,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:01,767 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:01,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:54:01,767 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:01,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:01,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1726639508, now seen corresponding path program 30 times [2020-10-29 09:54:01,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:01,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790097443] [2020-10-29 09:54:01,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:01,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:01,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:02,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:02,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 09:54:02,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:02,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 599 [2020-10-29 09:54:02,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:02,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:02,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 09:54:02,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:02,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 09:54:02,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:03,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:03,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:03,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:03,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:03,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:03,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:03,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:03,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:03,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:03,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:03,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:03,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:03,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790097443] [2020-10-29 09:54:03,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:03,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 09:54:03,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901581104] [2020-10-29 09:54:03,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 09:54:03,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:03,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 09:54:03,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:54:03,187 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 34 states. [2020-10-29 09:54:05,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:05,410 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2020-10-29 09:54:05,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:54:05,411 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-29 09:54:05,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:05,412 INFO L225 Difference]: With dead ends: 94 [2020-10-29 09:54:05,412 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 09:54:05,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-29 09:54:05,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 09:54:05,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-29 09:54:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-29 09:54:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-10-29 09:54:05,420 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 76 [2020-10-29 09:54:05,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:05,420 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-10-29 09:54:05,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 09:54:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-10-29 09:54:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 09:54:05,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:05,421 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:05,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:54:05,422 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:05,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:05,422 INFO L82 PathProgramCache]: Analyzing trace with hash -113607537, now seen corresponding path program 31 times [2020-10-29 09:54:05,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:05,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826420331] [2020-10-29 09:54:05,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:05,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:05,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:06,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:06,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 09:54:06,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:06,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-10-29 09:54:06,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:06,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:06,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 09:54:06,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:06,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 09:54:06,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:06,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:06,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:06,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:06,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:06,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:06,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:54:06,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:06,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:06,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:06,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:06,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:06,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:06,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826420331] [2020-10-29 09:54:06,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:06,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-29 09:54:06,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363477331] [2020-10-29 09:54:06,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-29 09:54:06,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:06,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-29 09:54:06,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:54:06,938 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 35 states. [2020-10-29 09:54:09,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:09,275 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2020-10-29 09:54:09,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 09:54:09,276 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-29 09:54:09,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:09,277 INFO L225 Difference]: With dead ends: 96 [2020-10-29 09:54:09,277 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 09:54:09,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-29 09:54:09,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 09:54:09,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-29 09:54:09,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-29 09:54:09,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-10-29 09:54:09,287 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 78 [2020-10-29 09:54:09,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:09,287 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-10-29 09:54:09,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-29 09:54:09,287 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-10-29 09:54:09,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 09:54:09,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:09,288 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:09,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:54:09,288 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:09,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:09,289 INFO L82 PathProgramCache]: Analyzing trace with hash -473077262, now seen corresponding path program 32 times [2020-10-29 09:54:09,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:09,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548632333] [2020-10-29 09:54:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:09,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:09,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:10,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:10,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 09:54:10,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:10,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-10-29 09:54:10,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:10,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:10,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 09:54:10,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:10,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-29 09:54:10,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:10,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:10,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:10,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:10,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:10,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:10,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:10,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:10,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:10,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:10,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:10,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:10,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:10,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548632333] [2020-10-29 09:54:10,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:10,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 09:54:10,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840832679] [2020-10-29 09:54:10,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 09:54:10,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:10,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 09:54:10,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:54:10,970 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 36 states. [2020-10-29 09:54:13,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:13,343 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2020-10-29 09:54:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 09:54:13,344 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2020-10-29 09:54:13,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:13,345 INFO L225 Difference]: With dead ends: 98 [2020-10-29 09:54:13,346 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:54:13,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-29 09:54:13,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:54:13,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-29 09:54:13,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-29 09:54:13,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-10-29 09:54:13,354 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 80 [2020-10-29 09:54:13,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:13,355 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-10-29 09:54:13,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 09:54:13,355 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-10-29 09:54:13,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 09:54:13,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:13,356 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:13,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:54:13,356 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:13,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:13,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1968867989, now seen corresponding path program 33 times [2020-10-29 09:54:13,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:13,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021809396] [2020-10-29 09:54:13,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:13,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:13,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:14,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:14,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 09:54:14,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:14,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-10-29 09:54:14,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:14,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:14,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 09:54:14,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:14,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 09:54:14,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:15,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:15,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:15,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:15,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:15,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:15,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:15,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:15,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:15,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:15,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:15,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:15,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:15,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021809396] [2020-10-29 09:54:15,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:15,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 09:54:15,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818642508] [2020-10-29 09:54:15,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 09:54:15,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:15,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 09:54:15,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:54:15,081 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 37 states. [2020-10-29 09:54:17,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:17,548 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2020-10-29 09:54:17,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 09:54:17,549 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-29 09:54:17,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:17,550 INFO L225 Difference]: With dead ends: 100 [2020-10-29 09:54:17,550 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 09:54:17,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-29 09:54:17,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 09:54:17,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-29 09:54:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-29 09:54:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-10-29 09:54:17,558 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 82 [2020-10-29 09:54:17,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:17,559 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-10-29 09:54:17,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 09:54:17,559 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-10-29 09:54:17,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 09:54:17,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:17,560 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:17,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:54:17,560 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:17,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:17,560 INFO L82 PathProgramCache]: Analyzing trace with hash -668856712, now seen corresponding path program 34 times [2020-10-29 09:54:17,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:17,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384742140] [2020-10-29 09:54:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:17,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:17,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:18,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:18,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 09:54:18,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:18,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 797 [2020-10-29 09:54:18,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:18,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:18,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 09:54:18,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:18,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 09:54:18,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:19,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:19,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:19,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:19,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:19,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:19,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:19,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:19,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:19,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:19,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:19,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:19,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:19,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384742140] [2020-10-29 09:54:19,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:19,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-29 09:54:19,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788346290] [2020-10-29 09:54:19,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-29 09:54:19,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:19,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-29 09:54:19,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:54:19,397 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 38 states. [2020-10-29 09:54:21,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:21,979 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2020-10-29 09:54:21,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-29 09:54:21,980 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 84 [2020-10-29 09:54:21,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:21,981 INFO L225 Difference]: With dead ends: 102 [2020-10-29 09:54:21,981 INFO L226 Difference]: Without dead ends: 89 [2020-10-29 09:54:21,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-29 09:54:21,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-29 09:54:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-29 09:54:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 09:54:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-10-29 09:54:21,989 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 84 [2020-10-29 09:54:21,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:21,990 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-10-29 09:54:21,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-29 09:54:21,990 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-10-29 09:54:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 09:54:21,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:21,991 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:21,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:54:21,991 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:21,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:21,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1491589733, now seen corresponding path program 35 times [2020-10-29 09:54:21,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:21,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450111771] [2020-10-29 09:54:21,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:22,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:22,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:22,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:22,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-29 09:54:22,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:22,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 750 [2020-10-29 09:54:22,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:22,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:22,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-29 09:54:22,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:22,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-29 09:54:22,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:23,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:23,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:23,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:23,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:23,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:23,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:54:23,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:23,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:23,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:23,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:23,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:23,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:23,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450111771] [2020-10-29 09:54:23,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:23,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-29 09:54:23,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115828915] [2020-10-29 09:54:23,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-29 09:54:23,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:23,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-29 09:54:23,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:54:23,813 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 39 states. [2020-10-29 09:54:26,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:26,558 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2020-10-29 09:54:26,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-29 09:54:26,559 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 86 [2020-10-29 09:54:26,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:26,560 INFO L225 Difference]: With dead ends: 104 [2020-10-29 09:54:26,560 INFO L226 Difference]: Without dead ends: 91 [2020-10-29 09:54:26,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-29 09:54:26,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-29 09:54:26,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-29 09:54:26,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-29 09:54:26,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-10-29 09:54:26,568 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 86 [2020-10-29 09:54:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:26,568 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-10-29 09:54:26,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-29 09:54:26,568 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-10-29 09:54:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-29 09:54:26,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:26,569 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:26,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:54:26,569 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:26,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:26,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1864040450, now seen corresponding path program 36 times [2020-10-29 09:54:26,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:26,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976531694] [2020-10-29 09:54:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:26,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:26,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:27,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:27,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-29 09:54:27,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:27,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 911 [2020-10-29 09:54:27,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:27,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:27,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-29 09:54:27,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:27,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 09:54:27,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:28,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:28,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:28,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:28,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:28,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:28,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:28,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:28,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:28,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:28,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:28,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:28,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:28,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976531694] [2020-10-29 09:54:28,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:28,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-29 09:54:28,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993164764] [2020-10-29 09:54:28,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-29 09:54:28,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:28,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-29 09:54:28,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:54:28,557 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 40 states. [2020-10-29 09:54:31,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:31,429 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2020-10-29 09:54:31,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 09:54:31,429 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2020-10-29 09:54:31,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:31,431 INFO L225 Difference]: With dead ends: 106 [2020-10-29 09:54:31,431 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 09:54:31,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-29 09:54:31,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 09:54:31,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-29 09:54:31,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 09:54:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-10-29 09:54:31,439 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 88 [2020-10-29 09:54:31,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:31,440 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-10-29 09:54:31,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-29 09:54:31,440 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-10-29 09:54:31,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-29 09:54:31,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:31,441 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:31,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:54:31,441 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:31,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:31,442 INFO L82 PathProgramCache]: Analyzing trace with hash 988073377, now seen corresponding path program 37 times [2020-10-29 09:54:31,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:31,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309438184] [2020-10-29 09:54:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:31,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:31,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:32,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:32,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-29 09:54:32,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:32,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 906 [2020-10-29 09:54:32,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:32,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:32,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-29 09:54:32,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:32,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 09:54:32,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:33,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:33,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:33,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:33,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:33,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:33,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:33,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:33,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:33,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:33,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:33,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:33,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:33,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309438184] [2020-10-29 09:54:33,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:33,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 09:54:33,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912846706] [2020-10-29 09:54:33,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 09:54:33,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:33,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 09:54:33,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:54:33,562 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 41 states. [2020-10-29 09:54:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:36,560 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2020-10-29 09:54:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-29 09:54:36,562 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2020-10-29 09:54:36,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:36,563 INFO L225 Difference]: With dead ends: 108 [2020-10-29 09:54:36,563 INFO L226 Difference]: Without dead ends: 95 [2020-10-29 09:54:36,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-10-29 09:54:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-29 09:54:36,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-29 09:54:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-29 09:54:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-10-29 09:54:36,571 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 90 [2020-10-29 09:54:36,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:36,572 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-10-29 09:54:36,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 09:54:36,572 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-10-29 09:54:36,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-29 09:54:36,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:36,573 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:36,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:54:36,573 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:36,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:36,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1680326276, now seen corresponding path program 38 times [2020-10-29 09:54:36,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:36,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154582842] [2020-10-29 09:54:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:36,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:36,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:37,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:37,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 09:54:37,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:37,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 938 [2020-10-29 09:54:37,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:37,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:37,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-29 09:54:37,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:37,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-29 09:54:37,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:38,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:38,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:38,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:38,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:38,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:38,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:38,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:38,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:38,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:38,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:38,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:38,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:38,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154582842] [2020-10-29 09:54:38,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:38,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-29 09:54:38,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124847373] [2020-10-29 09:54:38,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-29 09:54:38,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:38,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-29 09:54:38,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:54:38,774 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 42 states. [2020-10-29 09:54:41,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:41,699 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2020-10-29 09:54:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-29 09:54:41,700 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 92 [2020-10-29 09:54:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:41,701 INFO L225 Difference]: With dead ends: 110 [2020-10-29 09:54:41,702 INFO L226 Difference]: Without dead ends: 97 [2020-10-29 09:54:41,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-10-29 09:54:41,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-29 09:54:41,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-29 09:54:41,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:54:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-10-29 09:54:41,711 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 92 [2020-10-29 09:54:41,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:41,711 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-10-29 09:54:41,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-29 09:54:41,711 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-10-29 09:54:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-29 09:54:41,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:41,712 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:41,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:54:41,712 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:41,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:41,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1215431335, now seen corresponding path program 39 times [2020-10-29 09:54:41,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:41,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357519717] [2020-10-29 09:54:41,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:41,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:41,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:42,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:42,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-29 09:54:42,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:42,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-10-29 09:54:42,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:42,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:42,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-29 09:54:42,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:42,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 09:54:42,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:43,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:43,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:43,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:43,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:43,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:43,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:43,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:43,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:43,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:43,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:43,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:43,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:43,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357519717] [2020-10-29 09:54:43,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:43,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-29 09:54:43,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947366628] [2020-10-29 09:54:43,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-29 09:54:43,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:43,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-29 09:54:43,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:54:43,962 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 43 states. [2020-10-29 09:54:47,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:47,253 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2020-10-29 09:54:47,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-29 09:54:47,254 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 94 [2020-10-29 09:54:47,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:47,255 INFO L225 Difference]: With dead ends: 112 [2020-10-29 09:54:47,255 INFO L226 Difference]: Without dead ends: 99 [2020-10-29 09:54:47,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-10-29 09:54:47,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-29 09:54:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-29 09:54:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 09:54:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-10-29 09:54:47,262 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 94 [2020-10-29 09:54:47,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:47,262 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-10-29 09:54:47,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-29 09:54:47,263 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-10-29 09:54:47,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-29 09:54:47,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:47,263 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:47,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:54:47,264 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:47,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1127991818, now seen corresponding path program 40 times [2020-10-29 09:54:47,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:47,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270942882] [2020-10-29 09:54:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:47,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:47,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:48,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:48,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 09:54:48,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:48,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 990 [2020-10-29 09:54:48,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:48,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:48,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-29 09:54:48,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:48,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-29 09:54:48,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:49,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:49,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:49,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:49,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:49,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:49,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:49,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:49,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:49,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:49,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:49,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:49,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:49,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270942882] [2020-10-29 09:54:49,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:49,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-29 09:54:49,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199457032] [2020-10-29 09:54:49,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-29 09:54:49,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:49,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-29 09:54:49,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:54:49,636 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 44 states. [2020-10-29 09:54:53,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:53,029 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2020-10-29 09:54:53,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-29 09:54:53,030 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2020-10-29 09:54:53,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:53,031 INFO L225 Difference]: With dead ends: 114 [2020-10-29 09:54:53,031 INFO L226 Difference]: Without dead ends: 101 [2020-10-29 09:54:53,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-10-29 09:54:53,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-29 09:54:53,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-29 09:54:53,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 09:54:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-10-29 09:54:53,042 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 96 [2020-10-29 09:54:53,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:53,045 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-10-29 09:54:53,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-29 09:54:53,045 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-10-29 09:54:53,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-29 09:54:53,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:53,046 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:53,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:54:53,046 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:53,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:53,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1297005395, now seen corresponding path program 41 times [2020-10-29 09:54:53,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:53,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680900857] [2020-10-29 09:54:53,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:53,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:53,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:54,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:54,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-29 09:54:54,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:54,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1617 [2020-10-29 09:54:54,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:54,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:54,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-29 09:54:54,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:54,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-29 09:54:54,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:56,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:56,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:56,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:56,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:56,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:56,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:56,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:56,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:56,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:56,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:56,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:56,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:56,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680900857] [2020-10-29 09:54:56,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:56,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-29 09:54:56,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046132988] [2020-10-29 09:54:56,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-29 09:54:56,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:56,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-29 09:54:56,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:54:56,096 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 45 states. [2020-10-29 09:54:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:59,662 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2020-10-29 09:54:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-29 09:54:59,662 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 98 [2020-10-29 09:54:59,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:59,664 INFO L225 Difference]: With dead ends: 116 [2020-10-29 09:54:59,664 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:54:59,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-29 09:54:59,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:54:59,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-29 09:54:59,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-29 09:54:59,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-10-29 09:54:59,671 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 98 [2020-10-29 09:54:59,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:59,671 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-10-29 09:54:59,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-29 09:54:59,671 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-10-29 09:54:59,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-29 09:54:59,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:59,671 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:59,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:54:59,672 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:59,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:59,672 INFO L82 PathProgramCache]: Analyzing trace with hash 447914640, now seen corresponding path program 42 times [2020-10-29 09:54:59,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:59,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632882329] [2020-10-29 09:54:59,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:59,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:59,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:00,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:00,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-29 09:55:00,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:00,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 687 [2020-10-29 09:55:00,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:00,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:00,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-29 09:55:00,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:00,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 09:55:00,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:01,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:01,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:01,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:01,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:01,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:01,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:55:01,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:01,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:01,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:01,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:01,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:01,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:01,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632882329] [2020-10-29 09:55:01,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:01,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-29 09:55:01,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590393010] [2020-10-29 09:55:01,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-29 09:55:01,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:01,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-29 09:55:01,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:55:01,875 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 46 states. [2020-10-29 09:55:05,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:05,310 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2020-10-29 09:55:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-29 09:55:05,311 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 100 [2020-10-29 09:55:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:05,312 INFO L225 Difference]: With dead ends: 118 [2020-10-29 09:55:05,312 INFO L226 Difference]: Without dead ends: 105 [2020-10-29 09:55:05,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-10-29 09:55:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-29 09:55:05,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-29 09:55:05,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-29 09:55:05,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-10-29 09:55:05,321 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 100 [2020-10-29 09:55:05,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:05,321 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-10-29 09:55:05,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-29 09:55:05,321 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-10-29 09:55:05,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-29 09:55:05,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:05,322 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:05,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:55:05,322 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:05,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:05,322 INFO L82 PathProgramCache]: Analyzing trace with hash -2016144461, now seen corresponding path program 43 times [2020-10-29 09:55:05,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:05,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009423498] [2020-10-29 09:55:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:05,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:05,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:06,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:06,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-29 09:55:06,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:06,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 705 [2020-10-29 09:55:06,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:06,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:06,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-29 09:55:06,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:06,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-29 09:55:06,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:07,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:07,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:07,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:07,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:07,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:07,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:55:07,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:07,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:07,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:07,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:07,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:07,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:07,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009423498] [2020-10-29 09:55:07,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:07,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-29 09:55:07,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134020178] [2020-10-29 09:55:07,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-29 09:55:07,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:07,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-29 09:55:07,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:55:07,667 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 47 states. [2020-10-29 09:55:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:11,354 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2020-10-29 09:55:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-29 09:55:11,355 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 102 [2020-10-29 09:55:11,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:11,357 INFO L225 Difference]: With dead ends: 120 [2020-10-29 09:55:11,357 INFO L226 Difference]: Without dead ends: 107 [2020-10-29 09:55:11,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-10-29 09:55:11,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-29 09:55:11,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-29 09:55:11,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-29 09:55:11,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-10-29 09:55:11,365 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 102 [2020-10-29 09:55:11,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:11,365 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-10-29 09:55:11,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-29 09:55:11,366 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-10-29 09:55:11,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-29 09:55:11,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:11,366 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:11,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:55:11,367 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:11,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:11,367 INFO L82 PathProgramCache]: Analyzing trace with hash 845006870, now seen corresponding path program 44 times [2020-10-29 09:55:11,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:11,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061333478] [2020-10-29 09:55:11,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:11,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:11,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:12,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:12,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-29 09:55:12,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:12,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 755 [2020-10-29 09:55:12,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:12,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:12,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-29 09:55:12,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:12,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-29 09:55:12,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:13,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:13,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:13,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:13,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:13,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:13,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:55:13,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:13,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:13,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:13,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:13,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:13,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:13,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061333478] [2020-10-29 09:55:13,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:13,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-29 09:55:13,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362823761] [2020-10-29 09:55:13,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-29 09:55:13,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:13,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-29 09:55:13,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 09:55:13,819 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 48 states. [2020-10-29 09:55:17,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:17,455 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2020-10-29 09:55:17,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-29 09:55:17,456 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-10-29 09:55:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:17,458 INFO L225 Difference]: With dead ends: 122 [2020-10-29 09:55:17,458 INFO L226 Difference]: Without dead ends: 109 [2020-10-29 09:55:17,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-10-29 09:55:17,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-29 09:55:17,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-29 09:55:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-29 09:55:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2020-10-29 09:55:17,467 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 104 [2020-10-29 09:55:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:17,467 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2020-10-29 09:55:17,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-29 09:55:17,467 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2020-10-29 09:55:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-29 09:55:17,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:17,468 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:17,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:55:17,468 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:17,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:17,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1632366521, now seen corresponding path program 45 times [2020-10-29 09:55:17,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:17,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135055854] [2020-10-29 09:55:17,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:17,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:17,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:18,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:18,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-29 09:55:18,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:18,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 813 [2020-10-29 09:55:18,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:18,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:18,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-29 09:55:18,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:18,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-29 09:55:18,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:20,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:20,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:20,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:20,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:20,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:20,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:55:20,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:20,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:20,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:20,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:20,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:20,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:20,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135055854] [2020-10-29 09:55:20,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:20,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-29 09:55:20,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570937935] [2020-10-29 09:55:20,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-29 09:55:20,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:20,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-29 09:55:20,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:55:20,025 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand 49 states. [2020-10-29 09:55:24,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:24,127 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2020-10-29 09:55:24,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-29 09:55:24,127 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 106 [2020-10-29 09:55:24,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:24,129 INFO L225 Difference]: With dead ends: 124 [2020-10-29 09:55:24,129 INFO L226 Difference]: Without dead ends: 111 [2020-10-29 09:55:24,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-29 09:55:24,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-29 09:55:24,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-29 09:55:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-29 09:55:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2020-10-29 09:55:24,139 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 106 [2020-10-29 09:55:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:24,140 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2020-10-29 09:55:24,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-29 09:55:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2020-10-29 09:55:24,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-29 09:55:24,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:24,141 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:24,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-29 09:55:24,141 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:24,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:24,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1924220260, now seen corresponding path program 46 times [2020-10-29 09:55:24,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:24,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675837939] [2020-10-29 09:55:24,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:24,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:24,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:25,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:25,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-29 09:55:25,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:25,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1022 [2020-10-29 09:55:25,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:25,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:25,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-29 09:55:25,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:25,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-29 09:55:25,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:26,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:26,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:26,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:26,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:26,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:26,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:55:26,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:26,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:26,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:26,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:26,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:26,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:26,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675837939] [2020-10-29 09:55:26,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:26,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-29 09:55:26,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082185476] [2020-10-29 09:55:26,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-29 09:55:26,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:26,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-29 09:55:26,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-29 09:55:26,990 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 50 states. [2020-10-29 09:55:31,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:31,075 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2020-10-29 09:55:31,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-29 09:55:31,076 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 108 [2020-10-29 09:55:31,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:31,077 INFO L225 Difference]: With dead ends: 126 [2020-10-29 09:55:31,077 INFO L226 Difference]: Without dead ends: 113 [2020-10-29 09:55:31,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-10-29 09:55:31,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-29 09:55:31,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-10-29 09:55:31,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-29 09:55:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2020-10-29 09:55:31,086 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 108 [2020-10-29 09:55:31,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:31,086 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2020-10-29 09:55:31,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-29 09:55:31,086 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2020-10-29 09:55:31,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-29 09:55:31,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:31,087 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:31,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-29 09:55:31,087 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:31,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:31,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1010149185, now seen corresponding path program 47 times [2020-10-29 09:55:31,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:31,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861528164] [2020-10-29 09:55:31,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:31,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:31,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:32,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:32,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-29 09:55:32,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:32,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 922 [2020-10-29 09:55:32,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:32,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:32,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-29 09:55:32,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:32,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-29 09:55:32,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:33,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:33,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:33,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:33,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:33,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:33,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:55:33,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:33,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:33,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:33,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:33,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:33,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:33,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861528164] [2020-10-29 09:55:33,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:33,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-29 09:55:33,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602924209] [2020-10-29 09:55:33,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-29 09:55:33,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:33,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-29 09:55:33,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:55:33,914 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand 51 states. [2020-10-29 09:55:38,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:38,309 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2020-10-29 09:55:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-29 09:55:38,310 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 110 [2020-10-29 09:55:38,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:38,311 INFO L225 Difference]: With dead ends: 128 [2020-10-29 09:55:38,311 INFO L226 Difference]: Without dead ends: 115 [2020-10-29 09:55:38,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-29 09:55:38,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-29 09:55:38,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-29 09:55:38,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-29 09:55:38,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2020-10-29 09:55:38,321 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 110 [2020-10-29 09:55:38,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:38,321 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2020-10-29 09:55:38,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-29 09:55:38,322 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2020-10-29 09:55:38,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-29 09:55:38,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:38,322 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:38,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-29 09:55:38,323 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:38,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:38,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1238825506, now seen corresponding path program 48 times [2020-10-29 09:55:38,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:38,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223179924] [2020-10-29 09:55:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:38,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:38,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:39,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:39,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-29 09:55:39,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:39,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 967 [2020-10-29 09:55:39,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:39,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:39,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-29 09:55:39,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:39,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-29 09:55:39,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:41,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:41,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:41,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:41,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:41,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:41,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:55:41,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:41,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:41,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:41,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:41,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:41,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:41,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223179924] [2020-10-29 09:55:41,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:41,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-29 09:55:41,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855851912] [2020-10-29 09:55:41,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-29 09:55:41,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:41,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-29 09:55:41,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-29 09:55:41,322 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand 52 states. [2020-10-29 09:55:45,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:45,943 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2020-10-29 09:55:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-29 09:55:45,944 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 112 [2020-10-29 09:55:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:45,946 INFO L225 Difference]: With dead ends: 130 [2020-10-29 09:55:45,946 INFO L226 Difference]: Without dead ends: 117 [2020-10-29 09:55:45,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-10-29 09:55:45,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-29 09:55:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-10-29 09:55:45,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-29 09:55:45,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-10-29 09:55:45,955 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 112 [2020-10-29 09:55:45,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:45,956 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-10-29 09:55:45,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-29 09:55:45,956 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-10-29 09:55:45,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-29 09:55:45,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:45,957 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:45,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-29 09:55:45,957 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:45,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:45,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2134953669, now seen corresponding path program 49 times [2020-10-29 09:55:45,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:45,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602166986] [2020-10-29 09:55:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:45,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:46,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:46,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:46,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-29 09:55:46,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:46,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 966 [2020-10-29 09:55:46,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:46,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:46,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-29 09:55:46,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:46,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-29 09:55:46,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:48,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:48,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:48,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:48,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:48,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:48,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:55:48,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:48,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:48,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:48,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:48,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:48,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:48,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602166986] [2020-10-29 09:55:48,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:48,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-29 09:55:48,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130252823] [2020-10-29 09:55:48,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-29 09:55:48,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:48,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-29 09:55:48,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:55:48,993 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 53 states. [2020-10-29 09:55:53,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:53,704 INFO L93 Difference]: Finished difference Result 132 states and 139 transitions. [2020-10-29 09:55:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-29 09:55:53,705 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2020-10-29 09:55:53,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:53,706 INFO L225 Difference]: With dead ends: 132 [2020-10-29 09:55:53,706 INFO L226 Difference]: Without dead ends: 119 [2020-10-29 09:55:53,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-29 09:55:53,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-29 09:55:53,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-29 09:55:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-29 09:55:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2020-10-29 09:55:53,713 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 114 [2020-10-29 09:55:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:53,713 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2020-10-29 09:55:53,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-29 09:55:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2020-10-29 09:55:53,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-29 09:55:53,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:53,714 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:53,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-29 09:55:53,715 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:53,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:53,715 INFO L82 PathProgramCache]: Analyzing trace with hash 25691816, now seen corresponding path program 50 times [2020-10-29 09:55:53,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:53,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455890745] [2020-10-29 09:55:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:53,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:53,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:54,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:54,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-29 09:55:54,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:54,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 980 [2020-10-29 09:55:54,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:54,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:54,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-29 09:55:54,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:54,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-29 09:55:54,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:56,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:56,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:56,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:56,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:56,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:56,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:55:56,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:56,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:56,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:56,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:56,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:56,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:56,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455890745] [2020-10-29 09:55:56,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:56,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-29 09:55:56,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625767382] [2020-10-29 09:55:56,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-29 09:55:56,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:56,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-29 09:55:56,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-29 09:55:56,840 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand 54 states. [2020-10-29 09:56:01,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:01,674 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2020-10-29 09:56:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-29 09:56:01,675 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 116 [2020-10-29 09:56:01,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:01,677 INFO L225 Difference]: With dead ends: 134 [2020-10-29 09:56:01,677 INFO L226 Difference]: Without dead ends: 121 [2020-10-29 09:56:01,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-10-29 09:56:01,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-29 09:56:01,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-29 09:56:01,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-29 09:56:01,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2020-10-29 09:56:01,684 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 116 [2020-10-29 09:56:01,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:01,684 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2020-10-29 09:56:01,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-29 09:56:01,684 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2020-10-29 09:56:01,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-29 09:56:01,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:01,685 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:01,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-29 09:56:01,685 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:01,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:01,685 INFO L82 PathProgramCache]: Analyzing trace with hash 249614795, now seen corresponding path program 51 times [2020-10-29 09:56:01,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:01,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350331199] [2020-10-29 09:56:01,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:01,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:01,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:02,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:02,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-29 09:56:02,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:56:02,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 985 [2020-10-29 09:56:02,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:02,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:02,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-29 09:56:02,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:56:02,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-29 09:56:02,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:04,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:04,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:04,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:04,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:04,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:04,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:56:04,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:04,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:04,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:04,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:04,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:04,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 52 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:04,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350331199] [2020-10-29 09:56:04,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:04,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-29 09:56:04,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335960276] [2020-10-29 09:56:04,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-29 09:56:04,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:04,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-29 09:56:04,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:56:04,896 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand 55 states. [2020-10-29 09:56:09,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:09,772 INFO L93 Difference]: Finished difference Result 136 states and 143 transitions. [2020-10-29 09:56:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-29 09:56:09,773 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 118 [2020-10-29 09:56:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:09,774 INFO L225 Difference]: With dead ends: 136 [2020-10-29 09:56:09,775 INFO L226 Difference]: Without dead ends: 123 [2020-10-29 09:56:09,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-10-29 09:56:09,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-29 09:56:09,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-29 09:56:09,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-29 09:56:09,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2020-10-29 09:56:09,785 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 118 [2020-10-29 09:56:09,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:09,785 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2020-10-29 09:56:09,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-29 09:56:09,785 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2020-10-29 09:56:09,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-29 09:56:09,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:09,786 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:09,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-29 09:56:09,787 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:09,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:09,787 INFO L82 PathProgramCache]: Analyzing trace with hash 691232814, now seen corresponding path program 52 times [2020-10-29 09:56:09,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:09,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130610432] [2020-10-29 09:56:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:09,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:09,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:10,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:10,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-29 09:56:10,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:56:10,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1119 [2020-10-29 09:56:10,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:10,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:10,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-29 09:56:10,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:56:10,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-29 09:56:10,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:13,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:13,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:13,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:13,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:13,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:13,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:56:13,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:13,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:13,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:13,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:13,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:13,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 53 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:13,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130610432] [2020-10-29 09:56:13,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:13,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-29 09:56:13,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892844676] [2020-10-29 09:56:13,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-29 09:56:13,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:13,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-29 09:56:13,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-29 09:56:13,257 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand 56 states. [2020-10-29 09:56:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:18,456 INFO L93 Difference]: Finished difference Result 138 states and 145 transitions. [2020-10-29 09:56:18,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-29 09:56:18,457 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 120 [2020-10-29 09:56:18,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:18,458 INFO L225 Difference]: With dead ends: 138 [2020-10-29 09:56:18,458 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 09:56:18,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2020-10-29 09:56:18,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 09:56:18,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-10-29 09:56:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-29 09:56:18,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2020-10-29 09:56:18,468 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 120 [2020-10-29 09:56:18,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:18,468 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2020-10-29 09:56:18,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-29 09:56:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2020-10-29 09:56:18,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-29 09:56:18,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:18,469 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:18,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-29 09:56:18,469 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:18,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:18,470 INFO L82 PathProgramCache]: Analyzing trace with hash -115613231, now seen corresponding path program 53 times [2020-10-29 09:56:18,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:18,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151979696] [2020-10-29 09:56:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:18,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:18,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:19,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:19,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-29 09:56:19,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:56:19,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1312 [2020-10-29 09:56:19,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:19,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:19,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-29 09:56:19,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:56:19,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-29 09:56:19,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:22,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:22,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:22,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:22,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:22,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:22,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:56:22,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:22,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:22,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:22,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:22,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:22,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:22,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151979696] [2020-10-29 09:56:22,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:22,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-29 09:56:22,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696444233] [2020-10-29 09:56:22,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-29 09:56:22,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:22,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-29 09:56:22,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 09:56:22,222 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand 57 states. [2020-10-29 09:56:27,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:27,645 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2020-10-29 09:56:27,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-29 09:56:27,645 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 122 [2020-10-29 09:56:27,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:27,647 INFO L225 Difference]: With dead ends: 140 [2020-10-29 09:56:27,647 INFO L226 Difference]: Without dead ends: 127 [2020-10-29 09:56:27,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2020-10-29 09:56:27,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-29 09:56:27,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-29 09:56:27,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-29 09:56:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-10-29 09:56:27,657 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 122 [2020-10-29 09:56:27,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:27,657 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-10-29 09:56:27,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-29 09:56:27,657 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-10-29 09:56:27,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-29 09:56:27,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:27,658 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:27,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-29 09:56:27,658 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:27,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:27,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1894418100, now seen corresponding path program 54 times [2020-10-29 09:56:27,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:27,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504324345] [2020-10-29 09:56:27,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:27,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:27,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:28,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:28,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-29 09:56:28,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:56:28,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1110 [2020-10-29 09:56:28,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:28,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:28,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-29 09:56:28,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:56:28,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-29 09:56:28,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:31,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:31,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:31,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:31,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:31,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:31,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:56:31,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:31,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:31,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:31,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:31,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:31,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 55 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:31,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504324345] [2020-10-29 09:56:31,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:31,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-29 09:56:31,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486270227] [2020-10-29 09:56:31,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-29 09:56:31,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:31,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-29 09:56:31,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-29 09:56:31,283 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand 58 states. [2020-10-29 09:56:36,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:36,767 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2020-10-29 09:56:36,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-29 09:56:36,767 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 124 [2020-10-29 09:56:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:36,769 INFO L225 Difference]: With dead ends: 142 [2020-10-29 09:56:36,769 INFO L226 Difference]: Without dead ends: 129 [2020-10-29 09:56:36,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2020-10-29 09:56:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-29 09:56:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-10-29 09:56:36,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-29 09:56:36,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2020-10-29 09:56:36,777 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 124 [2020-10-29 09:56:36,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:36,777 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2020-10-29 09:56:36,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-29 09:56:36,777 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2020-10-29 09:56:36,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-29 09:56:36,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:36,778 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:36,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-29 09:56:36,778 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:36,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:36,778 INFO L82 PathProgramCache]: Analyzing trace with hash 799243991, now seen corresponding path program 55 times [2020-10-29 09:56:36,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:36,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028098270] [2020-10-29 09:56:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:36,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:36,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:38,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:38,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-29 09:56:38,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:56:38,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1214 [2020-10-29 09:56:38,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:38,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:38,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-29 09:56:38,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:56:38,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-29 09:56:38,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:40,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:40,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:40,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:40,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:40,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:40,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:56:40,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:40,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:40,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:40,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:40,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:40,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:40,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028098270] [2020-10-29 09:56:40,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:40,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-29 09:56:40,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106081332] [2020-10-29 09:56:40,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-29 09:56:40,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:40,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-29 09:56:40,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-29 09:56:40,571 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand 59 states. [2020-10-29 09:56:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:46,267 INFO L93 Difference]: Finished difference Result 144 states and 151 transitions. [2020-10-29 09:56:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-29 09:56:46,268 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 126 [2020-10-29 09:56:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:46,270 INFO L225 Difference]: With dead ends: 144 [2020-10-29 09:56:46,270 INFO L226 Difference]: Without dead ends: 131 [2020-10-29 09:56:46,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2020-10-29 09:56:46,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-29 09:56:46,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-29 09:56:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-29 09:56:46,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2020-10-29 09:56:46,279 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 126 [2020-10-29 09:56:46,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:46,279 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2020-10-29 09:56:46,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-29 09:56:46,279 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2020-10-29 09:56:46,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-29 09:56:46,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:46,280 INFO L422 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:46,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-29 09:56:46,280 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:46,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:46,280 INFO L82 PathProgramCache]: Analyzing trace with hash 603912762, now seen corresponding path program 56 times [2020-10-29 09:56:46,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:46,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773878057] [2020-10-29 09:56:46,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:46,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:46,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:47,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:47,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-29 09:56:47,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:56:47,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1388 [2020-10-29 09:56:47,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:47,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:47,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-29 09:56:47,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:56:47,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-29 09:56:47,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:50,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:50,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:50,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:50,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:50,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:50,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:56:50,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:50,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:50,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:50,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:50,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:50,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:50,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773878057] [2020-10-29 09:56:50,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:50,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-29 09:56:50,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654118775] [2020-10-29 09:56:50,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-29 09:56:50,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:50,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-29 09:56:50,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-29 09:56:50,380 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand 60 states. [2020-10-29 09:56:56,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:56,263 INFO L93 Difference]: Finished difference Result 146 states and 153 transitions. [2020-10-29 09:56:56,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-29 09:56:56,267 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 128 [2020-10-29 09:56:56,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:56,268 INFO L225 Difference]: With dead ends: 146 [2020-10-29 09:56:56,268 INFO L226 Difference]: Without dead ends: 133 [2020-10-29 09:56:56,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2020-10-29 09:56:56,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-29 09:56:56,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-29 09:56:56,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-29 09:56:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2020-10-29 09:56:56,277 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 128 [2020-10-29 09:56:56,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:56,278 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2020-10-29 09:56:56,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-29 09:56:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2020-10-29 09:56:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-29 09:56:56,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:56,279 INFO L422 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:56,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-29 09:56:56,279 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:56,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:56,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1869162717, now seen corresponding path program 57 times [2020-10-29 09:56:56,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:56,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10795676] [2020-10-29 09:56:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:56,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:56,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:57,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:57,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-29 09:56:57,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:56:57,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1533 [2020-10-29 09:56:57,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:57,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:57,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-29 09:56:57,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:56:57,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-29 09:56:57,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0