/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_init1_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:58:40,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:58:40,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:58:40,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:58:40,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:58:40,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:58:40,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:58:40,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:58:40,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:58:40,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:58:40,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:58:40,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:58:40,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:58:40,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:58:40,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:58:40,710 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:58:40,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:58:40,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:58:40,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:58:40,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:58:40,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:58:40,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:58:40,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:58:40,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:58:40,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:58:40,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:58:40,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:58:40,747 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:58:40,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:58:40,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:58:40,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:58:40,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:58:40,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:58:40,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:58:40,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:58:40,754 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:58:40,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:58:40,755 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:58:40,755 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:58:40,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:58:40,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:58:40,758 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 08:58:40,807 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:58:40,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:58:40,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:58:40,812 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:58:40,812 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:58:40,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:58:40,813 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:58:40,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:58:40,813 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:58:40,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:58:40,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:58:40,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:58:40,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:58:40,815 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:58:40,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:58:40,816 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:58:40,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:58:40,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:58:40,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:58:40,816 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:58:40,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:58:40,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:58:40,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:58:40,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:58:40,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:58:40,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:58:40,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:58:40,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:58:40,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:58:40,818 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:58:41,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:58:41,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:58:41,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:58:41,229 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:58:41,229 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:58:41,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init1_ground-1.i [2020-10-28 08:58:41,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b88e90bd1/61aa45ba822b4fdb830f0f8f0a42480c/FLAGd4f497c7d [2020-10-28 08:58:41,992 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:58:41,993 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init1_ground-1.i [2020-10-28 08:58:42,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b88e90bd1/61aa45ba822b4fdb830f0f8f0a42480c/FLAGd4f497c7d [2020-10-28 08:58:42,353 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b88e90bd1/61aa45ba822b4fdb830f0f8f0a42480c [2020-10-28 08:58:42,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:58:42,369 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:58:42,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:58:42,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:58:42,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:58:42,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:58:42" (1/1) ... [2020-10-28 08:58:42,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5915986f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:42, skipping insertion in model container [2020-10-28 08:58:42,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:58:42" (1/1) ... [2020-10-28 08:58:42,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:58:42,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:58:42,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:58:42,642 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:58:42,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:58:42,681 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:58:42,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:42 WrapperNode [2020-10-28 08:58:42,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:58:42,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:58:42,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:58:42,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:58:42,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:42" (1/1) ... [2020-10-28 08:58:42,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:42" (1/1) ... [2020-10-28 08:58:42,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:42" (1/1) ... [2020-10-28 08:58:42,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:42" (1/1) ... [2020-10-28 08:58:42,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:42" (1/1) ... [2020-10-28 08:58:42,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:42" (1/1) ... [2020-10-28 08:58:42,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:42" (1/1) ... [2020-10-28 08:58:42,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:58:42,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:58:42,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:58:42,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:58:42,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:58:42,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:58:42,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:58:42,830 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:58:42,830 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:58:42,830 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:58:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:58:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:58:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:58:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:58:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:58:42,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:58:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:58:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:58:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:58:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:58:42,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:58:42,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:58:42,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:58:42,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:58:43,220 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:58:43,220 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 08:58:43,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:58:43 BoogieIcfgContainer [2020-10-28 08:58:43,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:58:43,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:58:43,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:58:43,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:58:43,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:58:42" (1/3) ... [2020-10-28 08:58:43,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b1fcd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:58:43, skipping insertion in model container [2020-10-28 08:58:43,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:42" (2/3) ... [2020-10-28 08:58:43,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b1fcd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:58:43, skipping insertion in model container [2020-10-28 08:58:43,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:58:43" (3/3) ... [2020-10-28 08:58:43,234 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init1_ground-1.i [2020-10-28 08:58:43,250 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:58:43,256 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:58:43,285 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:58:43,350 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:58:43,350 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:58:43,353 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:58:43,353 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:58:43,354 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:58:43,354 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:58:43,354 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:58:43,354 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:58:43,379 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-28 08:58:43,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 08:58:43,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:43,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:43,393 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:43,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:43,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1010338642, now seen corresponding path program 1 times [2020-10-28 08:58:43,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:43,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662497975] [2020-10-28 08:58:43,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:43,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:43,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:43,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 08:58:43,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:43,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-28 08:58:43,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:43,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:43,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:58:43,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:43,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:58:43,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:58:43,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:43,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:43,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:43,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:43,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:43,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 08:58:43,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:43,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:43,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:43,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:43,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:43,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:43,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662497975] [2020-10-28 08:58:43,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:58:43,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:58:43,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48749763] [2020-10-28 08:58:43,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:58:43,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:44,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:58:44,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:58:44,013 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2020-10-28 08:58:44,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:44,142 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-10-28 08:58:44,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:58:44,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-28 08:58:44,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:44,153 INFO L225 Difference]: With dead ends: 47 [2020-10-28 08:58:44,154 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 08:58:44,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:58:44,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 08:58:44,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 08:58:44,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 08:58:44,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-28 08:58:44,202 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2020-10-28 08:58:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:44,203 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-28 08:58:44,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:58:44,203 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-28 08:58:44,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 08:58:44,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:44,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:44,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:58:44,205 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:44,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1740012936, now seen corresponding path program 1 times [2020-10-28 08:58:44,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:44,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251775758] [2020-10-28 08:58:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:44,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:44,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:44,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 08:58:44,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:44,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-28 08:58:44,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:44,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:44,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:58:44,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:44,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 08:58:44,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:44,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:44,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:44,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:44,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:44,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:44,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 08:58:44,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:44,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:44,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:44,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:44,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:44,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:44,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251775758] [2020-10-28 08:58:44,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:44,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:58:44,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322683342] [2020-10-28 08:58:44,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:58:44,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:44,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:58:44,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:58:44,540 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-10-28 08:58:44,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:44,623 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-28 08:58:44,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:58:44,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-28 08:58:44,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:44,625 INFO L225 Difference]: With dead ends: 35 [2020-10-28 08:58:44,625 INFO L226 Difference]: Without dead ends: 22 [2020-10-28 08:58:44,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:58:44,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-28 08:58:44,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-28 08:58:44,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 08:58:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-28 08:58:44,635 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2020-10-28 08:58:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:44,635 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-28 08:58:44,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:58:44,636 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-28 08:58:44,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 08:58:44,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:44,640 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:44,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:58:44,641 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:44,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:44,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1409887726, now seen corresponding path program 2 times [2020-10-28 08:58:44,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:44,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409842270] [2020-10-28 08:58:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:44,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:44,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:44,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 08:58:44,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:44,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-28 08:58:44,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:44,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:44,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:58:44,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:44,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:58:44,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:44,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:44,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:44,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:44,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:44,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:44,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 08:58:44,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:44,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:44,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:44,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:44,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:44,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:45,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409842270] [2020-10-28 08:58:45,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:45,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:58:45,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508277768] [2020-10-28 08:58:45,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:58:45,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:45,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:58:45,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:58:45,015 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-10-28 08:58:45,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:45,129 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-28 08:58:45,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:58:45,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-28 08:58:45,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:45,131 INFO L225 Difference]: With dead ends: 36 [2020-10-28 08:58:45,131 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 08:58:45,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:58:45,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 08:58:45,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-28 08:58:45,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 08:58:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-28 08:58:45,140 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2020-10-28 08:58:45,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:45,140 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-28 08:58:45,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:58:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-28 08:58:45,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 08:58:45,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:45,142 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:45,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:58:45,142 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:45,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:45,143 INFO L82 PathProgramCache]: Analyzing trace with hash 272560440, now seen corresponding path program 3 times [2020-10-28 08:58:45,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:45,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159431884] [2020-10-28 08:58:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:45,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:45,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:45,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 08:58:45,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:45,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-28 08:58:45,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:45,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:45,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:58:45,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:45,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 08:58:45,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:45,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:45,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:45,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:45,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:45,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:45,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:58:45,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:45,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:45,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:45,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:45,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:45,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:45,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159431884] [2020-10-28 08:58:45,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:45,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:58:45,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132142380] [2020-10-28 08:58:45,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:58:45,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:45,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:58:45,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:58:45,364 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-10-28 08:58:45,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:45,450 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-28 08:58:45,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:58:45,451 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-28 08:58:45,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:45,452 INFO L225 Difference]: With dead ends: 37 [2020-10-28 08:58:45,452 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 08:58:45,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:58:45,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 08:58:45,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 08:58:45,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 08:58:45,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-28 08:58:45,460 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2020-10-28 08:58:45,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:45,460 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-28 08:58:45,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:58:45,461 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-28 08:58:45,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 08:58:45,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:45,462 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:45,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:58:45,462 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:45,463 INFO L82 PathProgramCache]: Analyzing trace with hash -624847058, now seen corresponding path program 4 times [2020-10-28 08:58:45,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:45,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720378821] [2020-10-28 08:58:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:45,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:45,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:45,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 08:58:45,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:45,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-28 08:58:45,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:45,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:58:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:58:45,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:45,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:45,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:45,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:45,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:45,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:45,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 08:58:45,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:45,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:45,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:45,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:45,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720378821] [2020-10-28 08:58:45,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:45,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:58:45,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940640388] [2020-10-28 08:58:45,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:58:45,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:45,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:58:45,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:58:45,778 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-10-28 08:58:45,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:45,895 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-28 08:58:45,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:58:45,896 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-28 08:58:45,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:45,897 INFO L225 Difference]: With dead ends: 38 [2020-10-28 08:58:45,897 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 08:58:45,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:58:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 08:58:45,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-28 08:58:45,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 08:58:45,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-28 08:58:45,909 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2020-10-28 08:58:45,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:45,909 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-28 08:58:45,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:58:45,909 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-28 08:58:45,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 08:58:45,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:45,911 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:45,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:58:45,911 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:45,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:45,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1620291576, now seen corresponding path program 5 times [2020-10-28 08:58:45,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:45,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441318580] [2020-10-28 08:58:45,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:45,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:46,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:46,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 08:58:46,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:46,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-28 08:58:46,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:46,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:46,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:58:46,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:46,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 08:58:46,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:46,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:46,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:46,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:46,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:46,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:46,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:58:46,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:46,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:46,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:46,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:46,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:46,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:46,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441318580] [2020-10-28 08:58:46,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:46,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:58:46,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234358934] [2020-10-28 08:58:46,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:58:46,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:46,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:58:46,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:58:46,204 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2020-10-28 08:58:46,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:46,308 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-28 08:58:46,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:58:46,308 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-28 08:58:46,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:46,309 INFO L225 Difference]: With dead ends: 39 [2020-10-28 08:58:46,309 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 08:58:46,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:58:46,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 08:58:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-28 08:58:46,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 08:58:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-28 08:58:46,315 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2020-10-28 08:58:46,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:46,316 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-28 08:58:46,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:58:46,316 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-28 08:58:46,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:58:46,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:46,317 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:46,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:58:46,317 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:46,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:46,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1794854802, now seen corresponding path program 6 times [2020-10-28 08:58:46,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:46,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595160498] [2020-10-28 08:58:46,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:46,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:46,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:46,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:58:46,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:46,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-28 08:58:46,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:46,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:46,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:58:46,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:46,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:58:46,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:46,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:46,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:46,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:46,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:46,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:46,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:58:46,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:46,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:46,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:46,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:46,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:46,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:46,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595160498] [2020-10-28 08:58:46,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:46,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:58:46,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189793894] [2020-10-28 08:58:46,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:58:46,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:46,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:58:46,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:58:46,637 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2020-10-28 08:58:46,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:46,732 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-28 08:58:46,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:58:46,732 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-28 08:58:46,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:46,733 INFO L225 Difference]: With dead ends: 40 [2020-10-28 08:58:46,733 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 08:58:46,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:58:46,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 08:58:46,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 08:58:46,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 08:58:46,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-28 08:58:46,740 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2020-10-28 08:58:46,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:46,740 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-28 08:58:46,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:58:46,741 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-28 08:58:46,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 08:58:46,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:46,741 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:46,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:58:46,742 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:46,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:46,742 INFO L82 PathProgramCache]: Analyzing trace with hash -290210120, now seen corresponding path program 7 times [2020-10-28 08:58:46,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:46,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822535870] [2020-10-28 08:58:46,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:46,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:47,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:47,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 08:58:47,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:47,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-28 08:58:47,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:47,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:47,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:58:47,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:47,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 08:58:47,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:47,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:47,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:47,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:47,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:47,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:47,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 08:58:47,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:47,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:47,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:47,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:47,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:47,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:47,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822535870] [2020-10-28 08:58:47,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:47,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:58:47,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765227643] [2020-10-28 08:58:47,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:58:47,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:47,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:58:47,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:58:47,162 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-10-28 08:58:47,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:47,229 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-28 08:58:47,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:58:47,230 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-28 08:58:47,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:47,231 INFO L225 Difference]: With dead ends: 41 [2020-10-28 08:58:47,231 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 08:58:47,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:58:47,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 08:58:47,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 08:58:47,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 08:58:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-28 08:58:47,243 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2020-10-28 08:58:47,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:47,243 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-28 08:58:47,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:58:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-28 08:58:47,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 08:58:47,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:47,246 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:47,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:58:47,246 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:47,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:47,247 INFO L82 PathProgramCache]: Analyzing trace with hash -890865234, now seen corresponding path program 8 times [2020-10-28 08:58:47,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:47,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504178105] [2020-10-28 08:58:47,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:47,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:47,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:47,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 08:58:47,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:47,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-28 08:58:47,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:47,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:47,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:58:47,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:47,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:58:47,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:47,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:47,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:47,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:47,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:47,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:47,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:58:47,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:47,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:47,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:47,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:47,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:47,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:47,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504178105] [2020-10-28 08:58:47,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:47,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:58:47,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702019331] [2020-10-28 08:58:47,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:58:47,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:47,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:58:47,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:58:47,607 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2020-10-28 08:58:47,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:47,720 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-28 08:58:47,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:58:47,721 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-28 08:58:47,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:47,722 INFO L225 Difference]: With dead ends: 42 [2020-10-28 08:58:47,722 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 08:58:47,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:58:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 08:58:47,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 08:58:47,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 08:58:47,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-28 08:58:47,728 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2020-10-28 08:58:47,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:47,728 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-28 08:58:47,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:58:47,729 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-28 08:58:47,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 08:58:47,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:47,729 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:47,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:58:47,730 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:47,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:47,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1963662712, now seen corresponding path program 9 times [2020-10-28 08:58:47,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:47,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941982426] [2020-10-28 08:58:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:47,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:48,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:48,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 08:58:48,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:48,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-28 08:58:48,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:48,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:48,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:58:48,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:48,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 08:58:48,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:48,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:48,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:48,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:48,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:48,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:48,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:58:48,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:48,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:48,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:48,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:48,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:48,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:48,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941982426] [2020-10-28 08:58:48,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:48,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:58:48,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901088829] [2020-10-28 08:58:48,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:58:48,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:48,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:58:48,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:58:48,153 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 13 states. [2020-10-28 08:58:48,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:48,274 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-28 08:58:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:58:48,275 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-28 08:58:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:48,276 INFO L225 Difference]: With dead ends: 43 [2020-10-28 08:58:48,277 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 08:58:48,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:58:48,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 08:58:48,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 08:58:48,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 08:58:48,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-28 08:58:48,283 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2020-10-28 08:58:48,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:48,284 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-28 08:58:48,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:58:48,284 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-28 08:58:48,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 08:58:48,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:48,285 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:48,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:58:48,285 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:48,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:48,286 INFO L82 PathProgramCache]: Analyzing trace with hash 259715822, now seen corresponding path program 10 times [2020-10-28 08:58:48,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:48,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113758681] [2020-10-28 08:58:48,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:48,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:48,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:48,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 08:58:48,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:48,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-28 08:58:48,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:48,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:48,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:58:48,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:48,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:58:48,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:48,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:48,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:48,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:48,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:48,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:48,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:58:48,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:48,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:48,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:48,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:48,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:48,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:48,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113758681] [2020-10-28 08:58:48,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:48,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:58:48,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091022525] [2020-10-28 08:58:48,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:58:48,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:48,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:58:48,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:58:48,750 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 14 states. [2020-10-28 08:58:48,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:48,854 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-28 08:58:48,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:58:48,854 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-28 08:58:48,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:48,855 INFO L225 Difference]: With dead ends: 44 [2020-10-28 08:58:48,855 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 08:58:48,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:58:48,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 08:58:48,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 08:58:48,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 08:58:48,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-28 08:58:48,861 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2020-10-28 08:58:48,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:48,862 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-28 08:58:48,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:58:48,862 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-28 08:58:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 08:58:48,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:48,863 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:48,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:58:48,863 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:48,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:48,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1023030216, now seen corresponding path program 11 times [2020-10-28 08:58:48,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:48,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019487493] [2020-10-28 08:58:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:48,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:49,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:49,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 08:58:49,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:49,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-28 08:58:49,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:49,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:58:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 08:58:49,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:49,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:49,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:49,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:49,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:49,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:49,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 08:58:49,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:49,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:49,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:49,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:49,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:49,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:49,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019487493] [2020-10-28 08:58:49,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:49,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:58:49,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868328030] [2020-10-28 08:58:49,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:58:49,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:49,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:58:49,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:58:49,344 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 15 states. [2020-10-28 08:58:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:49,442 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-28 08:58:49,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:58:49,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-28 08:58:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:49,444 INFO L225 Difference]: With dead ends: 45 [2020-10-28 08:58:49,444 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 08:58:49,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:58:49,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 08:58:49,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-28 08:58:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 08:58:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-28 08:58:49,459 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2020-10-28 08:58:49,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:49,460 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-28 08:58:49,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:58:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-28 08:58:49,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 08:58:49,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:49,464 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:49,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:58:49,464 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:49,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:49,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2133451730, now seen corresponding path program 12 times [2020-10-28 08:58:49,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:49,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083882269] [2020-10-28 08:58:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:49,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:49,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:49,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 08:58:49,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:49,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-28 08:58:49,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:49,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:49,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:58:49,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:49,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:58:49,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:50,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:50,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:50,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:50,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:50,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:50,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:58:50,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:50,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:50,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:50,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083882269] [2020-10-28 08:58:50,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:50,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:58:50,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887156872] [2020-10-28 08:58:50,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:58:50,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:50,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:58:50,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:58:50,041 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2020-10-28 08:58:50,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:50,181 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-28 08:58:50,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:58:50,182 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-10-28 08:58:50,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:50,183 INFO L225 Difference]: With dead ends: 46 [2020-10-28 08:58:50,183 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 08:58:50,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:58:50,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 08:58:50,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-28 08:58:50,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 08:58:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-28 08:58:50,191 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2020-10-28 08:58:50,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:50,194 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-28 08:58:50,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:58:50,194 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-28 08:58:50,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 08:58:50,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:50,197 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:50,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:58:50,198 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:50,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:50,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2098187000, now seen corresponding path program 13 times [2020-10-28 08:58:50,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:50,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681746064] [2020-10-28 08:58:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:50,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:50,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:50,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 08:58:50,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:50,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-28 08:58:50,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:50,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:50,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:58:50,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:50,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 08:58:50,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:50,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:50,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:50,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:50,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:50,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:50,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:58:50,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:50,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:50,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:50,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:50,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:50,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:50,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681746064] [2020-10-28 08:58:50,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:50,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:58:50,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773780107] [2020-10-28 08:58:50,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:58:50,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:50,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:58:50,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:58:50,778 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-10-28 08:58:50,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:50,894 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-28 08:58:50,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:58:50,895 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-28 08:58:50,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:50,896 INFO L225 Difference]: With dead ends: 47 [2020-10-28 08:58:50,896 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 08:58:50,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:58:50,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 08:58:50,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-28 08:58:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 08:58:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-28 08:58:50,909 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 28 [2020-10-28 08:58:50,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:50,909 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-28 08:58:50,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:58:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-28 08:58:50,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:58:50,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:50,910 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:50,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:58:50,910 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:50,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:50,911 INFO L82 PathProgramCache]: Analyzing trace with hash 135001454, now seen corresponding path program 14 times [2020-10-28 08:58:50,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:50,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316527482] [2020-10-28 08:58:50,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:50,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:51,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:51,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:58:51,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:51,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-28 08:58:51,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:51,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:51,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:58:51,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:51,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:58:51,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:51,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:51,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:51,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:51,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:51,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:51,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:58:51,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:51,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:51,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:51,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:51,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:51,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:51,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316527482] [2020-10-28 08:58:51,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:51,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:58:51,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056472149] [2020-10-28 08:58:51,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:58:51,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:51,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:58:51,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:58:51,510 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 18 states. [2020-10-28 08:58:51,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:51,614 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-28 08:58:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:58:51,614 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2020-10-28 08:58:51,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:51,616 INFO L225 Difference]: With dead ends: 48 [2020-10-28 08:58:51,616 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 08:58:51,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:58:51,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 08:58:51,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-28 08:58:51,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 08:58:51,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-28 08:58:51,622 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2020-10-28 08:58:51,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:51,623 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-28 08:58:51,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:58:51,623 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-28 08:58:51,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 08:58:51,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:51,624 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:51,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:58:51,624 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:51,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:51,624 INFO L82 PathProgramCache]: Analyzing trace with hash -594208328, now seen corresponding path program 15 times [2020-10-28 08:58:51,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:51,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177268197] [2020-10-28 08:58:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:51,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:52,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:52,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 08:58:52,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:52,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-28 08:58:52,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:52,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:52,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:58:52,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:52,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 08:58:52,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:52,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:52,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:52,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:52,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:52,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:52,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:58:52,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:52,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:52,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:52,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:52,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:52,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:52,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177268197] [2020-10-28 08:58:52,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:52,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:58:52,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742546121] [2020-10-28 08:58:52,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:58:52,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:52,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:58:52,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:58:52,356 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 19 states. [2020-10-28 08:58:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:52,444 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-28 08:58:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:58:52,445 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2020-10-28 08:58:52,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:52,446 INFO L225 Difference]: With dead ends: 49 [2020-10-28 08:58:52,446 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 08:58:52,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:58:52,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 08:58:52,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-28 08:58:52,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 08:58:52,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-28 08:58:52,451 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2020-10-28 08:58:52,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:52,451 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-28 08:58:52,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:58:52,452 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-28 08:58:52,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 08:58:52,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:52,452 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:52,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:58:52,453 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:52,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1724875090, now seen corresponding path program 16 times [2020-10-28 08:58:52,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:52,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812669799] [2020-10-28 08:58:52,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:52,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:52,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:52,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 08:58:52,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:52,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-28 08:58:52,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:52,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:52,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:58:52,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:52,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:58:52,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:53,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:53,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:53,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:53,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:53,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:53,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:58:53,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:53,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:53,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:53,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:53,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:53,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:53,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812669799] [2020-10-28 08:58:53,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:53,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:58:53,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227507161] [2020-10-28 08:58:53,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:58:53,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:53,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:58:53,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:58:53,176 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 20 states. [2020-10-28 08:58:53,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:53,294 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-28 08:58:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:58:53,294 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-10-28 08:58:53,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:53,295 INFO L225 Difference]: With dead ends: 50 [2020-10-28 08:58:53,296 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 08:58:53,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:58:53,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 08:58:53,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-28 08:58:53,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 08:58:53,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-28 08:58:53,307 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2020-10-28 08:58:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:53,307 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-28 08:58:53,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:58:53,307 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-28 08:58:53,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 08:58:53,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:53,308 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:53,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:58:53,308 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:53,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:53,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1879160952, now seen corresponding path program 17 times [2020-10-28 08:58:53,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:53,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721792251] [2020-10-28 08:58:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:53,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:53,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:53,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 08:58:53,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:53,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-28 08:58:53,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:53,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:53,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:58:53,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:53,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 08:58:53,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:54,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:54,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:54,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:54,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:54,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:54,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:58:54,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:54,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:54,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:54,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:54,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:54,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:54,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721792251] [2020-10-28 08:58:54,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:54,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:58:54,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470844369] [2020-10-28 08:58:54,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:58:54,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:54,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:58:54,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:58:54,100 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 21 states. [2020-10-28 08:58:54,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:54,278 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-28 08:58:54,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:58:54,279 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-10-28 08:58:54,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:54,280 INFO L225 Difference]: With dead ends: 51 [2020-10-28 08:58:54,280 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 08:58:54,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:58:54,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 08:58:54,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-28 08:58:54,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 08:58:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-28 08:58:54,285 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2020-10-28 08:58:54,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:54,286 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-28 08:58:54,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:58:54,286 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-28 08:58:54,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 08:58:54,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:54,287 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:54,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:58:54,287 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:54,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:54,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1935128558, now seen corresponding path program 18 times [2020-10-28 08:58:54,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:54,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870473764] [2020-10-28 08:58:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:54,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:54,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:54,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 08:58:54,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:54,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-28 08:58:54,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:54,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:54,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:58:54,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:54,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:58:54,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:55,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:55,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:55,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:55,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:55,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:55,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:58:55,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:55,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:55,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:55,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:55,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:55,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:55,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870473764] [2020-10-28 08:58:55,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:55,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:58:55,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581731933] [2020-10-28 08:58:55,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:58:55,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:55,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:58:55,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:58:55,117 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 22 states. [2020-10-28 08:58:55,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:55,195 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-28 08:58:55,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:58:55,196 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2020-10-28 08:58:55,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:55,196 INFO L225 Difference]: With dead ends: 52 [2020-10-28 08:58:55,196 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 08:58:55,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:58:55,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 08:58:55,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-28 08:58:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 08:58:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-28 08:58:55,205 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 33 [2020-10-28 08:58:55,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:55,205 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-28 08:58:55,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:58:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-28 08:58:55,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 08:58:55,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:55,209 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:55,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:58:55,209 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:55,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:55,210 INFO L82 PathProgramCache]: Analyzing trace with hash -624842952, now seen corresponding path program 19 times [2020-10-28 08:58:55,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:55,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125031355] [2020-10-28 08:58:55,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:55,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:55,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:55,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 08:58:55,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:55,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 562 [2020-10-28 08:58:55,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:55,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:55,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 08:58:55,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:55,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 08:58:55,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:56,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:56,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:56,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:56,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:56,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:56,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:58:56,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:56,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:56,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:56,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:56,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:56,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:56,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125031355] [2020-10-28 08:58:56,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:56,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:58:56,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738854140] [2020-10-28 08:58:56,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:58:56,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:56,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:58:56,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:58:56,183 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 23 states. [2020-10-28 08:58:56,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:56,347 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-28 08:58:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:58:56,348 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 34 [2020-10-28 08:58:56,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:56,348 INFO L225 Difference]: With dead ends: 53 [2020-10-28 08:58:56,349 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 08:58:56,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:58:56,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 08:58:56,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-28 08:58:56,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 08:58:56,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-28 08:58:56,354 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2020-10-28 08:58:56,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:56,355 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-28 08:58:56,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:58:56,355 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-28 08:58:56,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 08:58:56,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:56,355 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:56,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:58:56,356 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:56,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:56,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1620418862, now seen corresponding path program 20 times [2020-10-28 08:58:56,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:56,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951972223] [2020-10-28 08:58:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:56,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:56,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:56,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 08:58:56,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:56,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 477 [2020-10-28 08:58:56,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:56,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:56,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:58:56,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:56,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:58:56,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:57,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:57,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:57,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:57,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:57,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:57,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:58:57,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:57,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:57,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:57,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:57,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:57,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:57,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951972223] [2020-10-28 08:58:57,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:57,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:58:57,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768106389] [2020-10-28 08:58:57,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:58:57,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:57,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:58:57,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:58:57,389 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 24 states. [2020-10-28 08:58:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:57,574 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-28 08:58:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:58:57,575 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2020-10-28 08:58:57,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:57,575 INFO L225 Difference]: With dead ends: 54 [2020-10-28 08:58:57,576 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 08:58:57,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:58:57,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 08:58:57,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-28 08:58:57,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 08:58:57,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-28 08:58:57,581 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2020-10-28 08:58:57,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:57,581 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-28 08:58:57,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:58:57,581 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-28 08:58:57,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 08:58:57,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:57,582 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:57,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:58:57,582 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:57,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:57,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1790908936, now seen corresponding path program 21 times [2020-10-28 08:58:57,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:57,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991828753] [2020-10-28 08:58:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:57,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:58,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:58,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 08:58:58,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:58,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-28 08:58:58,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:58,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:58,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 08:58:58,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:58,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 08:58:58,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:58,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:58,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:58,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:58,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:58,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:58,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:58:58,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:58,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:58,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:58,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:58,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:58:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:58,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991828753] [2020-10-28 08:58:58,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:58,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 08:58:58,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589198336] [2020-10-28 08:58:58,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 08:58:58,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:58,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 08:58:58,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:58:58,582 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 25 states. [2020-10-28 08:58:58,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:58,732 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-28 08:58:58,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 08:58:58,735 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2020-10-28 08:58:58,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:58,735 INFO L225 Difference]: With dead ends: 55 [2020-10-28 08:58:58,736 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 08:58:58,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:58:58,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 08:58:58,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 08:58:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 08:58:58,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-28 08:58:58,745 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2020-10-28 08:58:58,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:58,745 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-28 08:58:58,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 08:58:58,745 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-28 08:58:58,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 08:58:58,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:58,746 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:58,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:58:58,746 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:58,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:58,747 INFO L82 PathProgramCache]: Analyzing trace with hash -167888274, now seen corresponding path program 22 times [2020-10-28 08:58:58,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:58,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594246981] [2020-10-28 08:58:58,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:58,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:59,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:59,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 08:58:59,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:59,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-28 08:58:59,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:59,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:58:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:58:59,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:59,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:59,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:59,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:59,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:59,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:59,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:58:59,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:59,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:59,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:59,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:59,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:59,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:58:59,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594246981] [2020-10-28 08:58:59,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:59,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:58:59,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085605844] [2020-10-28 08:58:59,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:58:59,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:59,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:58:59,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:58:59,857 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 26 states. [2020-10-28 08:59:00,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:00,021 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-28 08:59:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 08:59:00,021 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 37 [2020-10-28 08:59:00,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:00,022 INFO L225 Difference]: With dead ends: 56 [2020-10-28 08:59:00,022 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 08:59:00,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:59:00,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 08:59:00,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-28 08:59:00,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 08:59:00,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-28 08:59:00,029 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 37 [2020-10-28 08:59:00,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:00,029 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-28 08:59:00,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:59:00,029 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-28 08:59:00,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 08:59:00,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:00,029 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:00,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:59:00,030 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:00,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:00,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1393855304, now seen corresponding path program 23 times [2020-10-28 08:59:00,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:00,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171822971] [2020-10-28 08:59:00,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:00,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:00,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:00,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 08:59:00,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:00,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 658 [2020-10-28 08:59:00,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:00,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:00,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 08:59:00,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:00,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 08:59:00,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:01,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:01,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:01,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:01,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:01,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:01,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:59:01,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:01,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:01,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:01,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:01,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:01,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:01,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171822971] [2020-10-28 08:59:01,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:01,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 08:59:01,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285575054] [2020-10-28 08:59:01,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 08:59:01,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:01,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 08:59:01,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:59:01,262 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 27 states. [2020-10-28 08:59:01,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:01,456 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-28 08:59:01,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 08:59:01,457 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 38 [2020-10-28 08:59:01,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:01,458 INFO L225 Difference]: With dead ends: 57 [2020-10-28 08:59:01,458 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 08:59:01,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:59:01,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 08:59:01,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-28 08:59:01,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 08:59:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-28 08:59:01,466 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 38 [2020-10-28 08:59:01,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:01,472 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-28 08:59:01,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 08:59:01,472 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-28 08:59:01,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 08:59:01,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:01,473 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:01,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:59:01,474 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:01,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:01,475 INFO L82 PathProgramCache]: Analyzing trace with hash -744127570, now seen corresponding path program 24 times [2020-10-28 08:59:01,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:01,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405733621] [2020-10-28 08:59:01,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:01,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:02,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:02,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 08:59:02,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:02,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-10-28 08:59:02,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:02,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:02,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 08:59:02,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:02,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:59:02,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:02,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:02,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:02,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:02,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:02,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:02,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:59:02,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:02,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:02,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:02,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:02,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:02,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:02,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405733621] [2020-10-28 08:59:02,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:02,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 08:59:02,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982027751] [2020-10-28 08:59:02,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 08:59:02,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:02,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 08:59:02,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:59:02,705 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 28 states. [2020-10-28 08:59:02,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:02,818 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-28 08:59:02,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 08:59:02,819 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 39 [2020-10-28 08:59:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:02,820 INFO L225 Difference]: With dead ends: 58 [2020-10-28 08:59:02,820 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 08:59:02,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:59:02,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 08:59:02,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-28 08:59:02,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 08:59:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-28 08:59:02,826 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 39 [2020-10-28 08:59:02,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:02,826 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-28 08:59:02,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 08:59:02,826 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-28 08:59:02,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 08:59:02,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:02,827 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:02,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:59:02,827 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:02,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:02,828 INFO L82 PathProgramCache]: Analyzing trace with hash -2077404296, now seen corresponding path program 25 times [2020-10-28 08:59:02,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:02,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706191778] [2020-10-28 08:59:02,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:02,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:03,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:03,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 08:59:03,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:03,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 606 [2020-10-28 08:59:03,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:03,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:03,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 08:59:03,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:03,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 08:59:03,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:04,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:04,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:04,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:04,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:04,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:04,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:04,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:04,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:04,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:04,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:04,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:04,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:04,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706191778] [2020-10-28 08:59:04,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:04,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 08:59:04,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104275055] [2020-10-28 08:59:04,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 08:59:04,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:04,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 08:59:04,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:59:04,079 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 29 states. [2020-10-28 08:59:04,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:04,350 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-28 08:59:04,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 08:59:04,351 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2020-10-28 08:59:04,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:04,352 INFO L225 Difference]: With dead ends: 59 [2020-10-28 08:59:04,352 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 08:59:04,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:59:04,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 08:59:04,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-28 08:59:04,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 08:59:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-28 08:59:04,362 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2020-10-28 08:59:04,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:04,363 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-28 08:59:04,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 08:59:04,363 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-28 08:59:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 08:59:04,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:04,363 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:04,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:59:04,364 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:04,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:04,368 INFO L82 PathProgramCache]: Analyzing trace with hash -459309842, now seen corresponding path program 26 times [2020-10-28 08:59:04,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:04,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088568755] [2020-10-28 08:59:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:04,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:05,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:05,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 08:59:05,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:05,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-10-28 08:59:05,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:05,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:05,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 08:59:05,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:05,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:59:05,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:05,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:05,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:05,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:05,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:05,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:05,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:05,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:05,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:05,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:05,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:05,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:05,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:05,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088568755] [2020-10-28 08:59:05,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:05,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 08:59:05,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347722414] [2020-10-28 08:59:05,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 08:59:05,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:05,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 08:59:05,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:59:05,676 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 30 states. [2020-10-28 08:59:05,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:05,881 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-28 08:59:05,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 08:59:05,881 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 41 [2020-10-28 08:59:05,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:05,882 INFO L225 Difference]: With dead ends: 60 [2020-10-28 08:59:05,882 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 08:59:05,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:59:05,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 08:59:05,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-28 08:59:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 08:59:05,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-28 08:59:05,890 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2020-10-28 08:59:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:05,890 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-28 08:59:05,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 08:59:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-28 08:59:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 08:59:05,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:05,891 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:05,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:59:05,891 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:05,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:05,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1837989320, now seen corresponding path program 27 times [2020-10-28 08:59:05,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:05,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140281468] [2020-10-28 08:59:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:05,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:06,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:06,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 08:59:06,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:06,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-28 08:59:06,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:06,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:06,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 08:59:06,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:06,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 08:59:06,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:07,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:07,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:07,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:07,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:07,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:07,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:07,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:07,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:07,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:07,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:07,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:07,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:07,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140281468] [2020-10-28 08:59:07,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:07,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 08:59:07,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899884282] [2020-10-28 08:59:07,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 08:59:07,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:07,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 08:59:07,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:59:07,263 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 31 states. [2020-10-28 08:59:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:07,401 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-28 08:59:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 08:59:07,402 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 42 [2020-10-28 08:59:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:07,403 INFO L225 Difference]: With dead ends: 61 [2020-10-28 08:59:07,403 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 08:59:07,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:59:07,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 08:59:07,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-28 08:59:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 08:59:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-28 08:59:07,409 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 42 [2020-10-28 08:59:07,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:07,410 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-28 08:59:07,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 08:59:07,410 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-28 08:59:07,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 08:59:07,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:07,411 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:07,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:59:07,411 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:07,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:07,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1627380178, now seen corresponding path program 28 times [2020-10-28 08:59:07,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:07,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947374799] [2020-10-28 08:59:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:07,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:08,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:08,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 08:59:08,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:08,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-28 08:59:08,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:08,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:08,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 08:59:08,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:08,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:59:08,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:08,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:08,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:08,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:08,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:08,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:08,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:08,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:08,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:08,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:08,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:08,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:08,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:08,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947374799] [2020-10-28 08:59:08,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:08,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 08:59:08,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639614691] [2020-10-28 08:59:08,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 08:59:08,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:08,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 08:59:08,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:59:08,882 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 32 states. [2020-10-28 08:59:09,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:09,154 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-28 08:59:09,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 08:59:09,155 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 43 [2020-10-28 08:59:09,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:09,156 INFO L225 Difference]: With dead ends: 62 [2020-10-28 08:59:09,156 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 08:59:09,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:59:09,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 08:59:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-28 08:59:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 08:59:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-28 08:59:09,170 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 43 [2020-10-28 08:59:09,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:09,171 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-28 08:59:09,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 08:59:09,171 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-28 08:59:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 08:59:09,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:09,171 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:09,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:59:09,172 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:09,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:09,172 INFO L82 PathProgramCache]: Analyzing trace with hash 606535928, now seen corresponding path program 29 times [2020-10-28 08:59:09,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:09,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445926848] [2020-10-28 08:59:09,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:09,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:09,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:09,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 08:59:09,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:09,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-28 08:59:09,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:09,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:09,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 08:59:09,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:09,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 08:59:09,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:10,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:10,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:10,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:10,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:10,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:10,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:10,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:10,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:10,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:10,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:10,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:10,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:10,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445926848] [2020-10-28 08:59:10,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:10,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 08:59:10,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355903897] [2020-10-28 08:59:10,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 08:59:10,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:10,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 08:59:10,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 08:59:10,701 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 33 states. [2020-10-28 08:59:10,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:10,879 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-28 08:59:10,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 08:59:10,880 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 44 [2020-10-28 08:59:10,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:10,880 INFO L225 Difference]: With dead ends: 63 [2020-10-28 08:59:10,880 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 08:59:10,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 08:59:10,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 08:59:10,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-28 08:59:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 08:59:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-28 08:59:10,889 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 44 [2020-10-28 08:59:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:10,889 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-28 08:59:10,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 08:59:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-28 08:59:10,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 08:59:10,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:10,890 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:10,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:59:10,891 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:10,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:10,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1138458478, now seen corresponding path program 30 times [2020-10-28 08:59:10,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:10,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075086830] [2020-10-28 08:59:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:10,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:11,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:11,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 08:59:11,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:11,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 733 [2020-10-28 08:59:11,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:11,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:11,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 08:59:11,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:11,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:59:11,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:12,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:12,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:12,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:12,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:12,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:12,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:12,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:12,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:12,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:12,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:12,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:12,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:12,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075086830] [2020-10-28 08:59:12,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:12,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 08:59:12,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555238344] [2020-10-28 08:59:12,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 08:59:12,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:12,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 08:59:12,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:59:12,436 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 34 states. [2020-10-28 08:59:12,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:12,677 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-28 08:59:12,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 08:59:12,678 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 45 [2020-10-28 08:59:12,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:12,679 INFO L225 Difference]: With dead ends: 64 [2020-10-28 08:59:12,679 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 08:59:12,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:59:12,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 08:59:12,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-28 08:59:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 08:59:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-28 08:59:12,684 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 45 [2020-10-28 08:59:12,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:12,685 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-28 08:59:12,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 08:59:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-28 08:59:12,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 08:59:12,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:12,685 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:12,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:59:12,686 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:12,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:12,686 INFO L82 PathProgramCache]: Analyzing trace with hash 448188344, now seen corresponding path program 31 times [2020-10-28 08:59:12,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:12,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74003796] [2020-10-28 08:59:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:12,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:13,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:13,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 08:59:13,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:13,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 703 [2020-10-28 08:59:13,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:13,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:13,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 08:59:13,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:13,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 08:59:13,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:14,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:14,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:14,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:14,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:14,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:14,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:14,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:14,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:14,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:14,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:14,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:14,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:14,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74003796] [2020-10-28 08:59:14,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:14,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 08:59:14,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9750867] [2020-10-28 08:59:14,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 08:59:14,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:14,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 08:59:14,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 08:59:14,237 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 35 states. [2020-10-28 08:59:14,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:14,510 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-28 08:59:14,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 08:59:14,511 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 46 [2020-10-28 08:59:14,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:14,511 INFO L225 Difference]: With dead ends: 65 [2020-10-28 08:59:14,511 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 08:59:14,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 08:59:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 08:59:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-28 08:59:14,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 08:59:14,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-28 08:59:14,518 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2020-10-28 08:59:14,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:14,518 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-28 08:59:14,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 08:59:14,518 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-28 08:59:14,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 08:59:14,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:14,519 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:14,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:59:14,519 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:14,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:14,519 INFO L82 PathProgramCache]: Analyzing trace with hash 524650670, now seen corresponding path program 32 times [2020-10-28 08:59:14,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:14,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829808577] [2020-10-28 08:59:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:14,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:15,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:15,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 08:59:15,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:15,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 913 [2020-10-28 08:59:15,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:15,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:15,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 08:59:15,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:15,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:59:15,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:16,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:16,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:16,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:16,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:16,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:16,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:16,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:16,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:16,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:16,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:16,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:16,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:16,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829808577] [2020-10-28 08:59:16,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:16,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 08:59:16,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379110142] [2020-10-28 08:59:16,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 08:59:16,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:16,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 08:59:16,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 08:59:16,357 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 36 states. [2020-10-28 08:59:16,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:16,654 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-28 08:59:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 08:59:16,655 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 47 [2020-10-28 08:59:16,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:16,656 INFO L225 Difference]: With dead ends: 66 [2020-10-28 08:59:16,656 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 08:59:16,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 08:59:16,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 08:59:16,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-28 08:59:16,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 08:59:16,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-28 08:59:16,663 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 47 [2020-10-28 08:59:16,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:16,663 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-28 08:59:16,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 08:59:16,663 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-28 08:59:16,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 08:59:16,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:16,664 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:16,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:59:16,664 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:16,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:16,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1399984520, now seen corresponding path program 33 times [2020-10-28 08:59:16,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:16,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644874851] [2020-10-28 08:59:16,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:16,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:17,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:17,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 08:59:17,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:17,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 880 [2020-10-28 08:59:17,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:17,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:17,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 08:59:17,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:17,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 08:59:17,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:18,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:18,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:18,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:18,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:18,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:18,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:59:18,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:18,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:18,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:18,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:18,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:18,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:18,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644874851] [2020-10-28 08:59:18,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:18,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 08:59:18,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447459581] [2020-10-28 08:59:18,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 08:59:18,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:18,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 08:59:18,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 08:59:18,690 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 37 states. [2020-10-28 08:59:18,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:18,922 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-10-28 08:59:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 08:59:18,923 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 48 [2020-10-28 08:59:18,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:18,924 INFO L225 Difference]: With dead ends: 67 [2020-10-28 08:59:18,924 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 08:59:18,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 08:59:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 08:59:18,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-28 08:59:18,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 08:59:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-28 08:59:18,928 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2020-10-28 08:59:18,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:18,929 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-28 08:59:18,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 08:59:18,929 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-28 08:59:18,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 08:59:18,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:18,929 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:18,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:59:18,930 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:18,930 INFO L82 PathProgramCache]: Analyzing trace with hash -934133266, now seen corresponding path program 34 times [2020-10-28 08:59:18,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:18,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566013796] [2020-10-28 08:59:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:18,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:19,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:19,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 08:59:19,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:19,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 776 [2020-10-28 08:59:19,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:19,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:19,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 08:59:19,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:19,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:59:19,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:20,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:20,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:20,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:20,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:20,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:20,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:20,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:20,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:20,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:20,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:20,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:20,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:20,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566013796] [2020-10-28 08:59:20,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:20,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 08:59:20,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552277939] [2020-10-28 08:59:20,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 08:59:20,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:20,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 08:59:20,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 08:59:20,824 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 38 states. [2020-10-28 08:59:21,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:21,065 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-28 08:59:21,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 08:59:21,066 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 49 [2020-10-28 08:59:21,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:21,067 INFO L225 Difference]: With dead ends: 68 [2020-10-28 08:59:21,067 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 08:59:21,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 08:59:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 08:59:21,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-28 08:59:21,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 08:59:21,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-28 08:59:21,072 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2020-10-28 08:59:21,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:21,073 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-28 08:59:21,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 08:59:21,073 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-28 08:59:21,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 08:59:21,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:21,073 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:21,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:59:21,074 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:21,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:21,074 INFO L82 PathProgramCache]: Analyzing trace with hash 622353720, now seen corresponding path program 35 times [2020-10-28 08:59:21,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:21,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038579777] [2020-10-28 08:59:21,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:21,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:21,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:21,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 08:59:21,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:21,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 797 [2020-10-28 08:59:21,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:21,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:21,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 08:59:21,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:21,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 08:59:21,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:22,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:22,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:22,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:22,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:22,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:22,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:22,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:22,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:22,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:22,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:22,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:22,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:22,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038579777] [2020-10-28 08:59:22,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:22,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 08:59:22,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522054306] [2020-10-28 08:59:22,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 08:59:22,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:22,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 08:59:22,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 08:59:22,914 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 39 states. [2020-10-28 08:59:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:23,179 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-28 08:59:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 08:59:23,180 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 50 [2020-10-28 08:59:23,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:23,181 INFO L225 Difference]: With dead ends: 69 [2020-10-28 08:59:23,181 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 08:59:23,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 08:59:23,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 08:59:23,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-28 08:59:23,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 08:59:23,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-28 08:59:23,185 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2020-10-28 08:59:23,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:23,186 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-28 08:59:23,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 08:59:23,186 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-28 08:59:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 08:59:23,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:23,186 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:23,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 08:59:23,187 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:23,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:23,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1628810030, now seen corresponding path program 36 times [2020-10-28 08:59:23,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:23,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482316256] [2020-10-28 08:59:23,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:23,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:24,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:24,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 08:59:24,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:24,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 838 [2020-10-28 08:59:24,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:24,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:24,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 08:59:24,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:24,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 08:59:24,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:25,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:25,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:25,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:25,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:25,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:25,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:25,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:25,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:25,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:25,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:25,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:25,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:25,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482316256] [2020-10-28 08:59:25,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:25,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 08:59:25,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869599512] [2020-10-28 08:59:25,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 08:59:25,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:25,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 08:59:25,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 08:59:25,172 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 40 states. [2020-10-28 08:59:25,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:25,476 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-28 08:59:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 08:59:25,477 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 51 [2020-10-28 08:59:25,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:25,477 INFO L225 Difference]: With dead ends: 70 [2020-10-28 08:59:25,478 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 08:59:25,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 08:59:25,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 08:59:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-28 08:59:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 08:59:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-28 08:59:25,485 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2020-10-28 08:59:25,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:25,485 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-28 08:59:25,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 08:59:25,485 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-28 08:59:25,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 08:59:25,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:25,486 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:25,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 08:59:25,486 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:25,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:25,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1530782728, now seen corresponding path program 37 times [2020-10-28 08:59:25,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:25,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32424795] [2020-10-28 08:59:25,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:25,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:26,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:26,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 08:59:26,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:26,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-10-28 08:59:26,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:26,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:26,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 08:59:26,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:26,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 08:59:26,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:27,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:27,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:27,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:27,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:27,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:27,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:59:27,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:27,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:27,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:27,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:27,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:27,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:27,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32424795] [2020-10-28 08:59:27,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:27,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 08:59:27,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884935440] [2020-10-28 08:59:27,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 08:59:27,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:27,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 08:59:27,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 08:59:27,722 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 41 states. [2020-10-28 08:59:28,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:28,011 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-28 08:59:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 08:59:28,011 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 52 [2020-10-28 08:59:28,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:28,012 INFO L225 Difference]: With dead ends: 71 [2020-10-28 08:59:28,012 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 08:59:28,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 08:59:28,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 08:59:28,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-28 08:59:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 08:59:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-28 08:59:28,019 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 52 [2020-10-28 08:59:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:28,019 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-28 08:59:28,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 08:59:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-28 08:59:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 08:59:28,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:28,021 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:28,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 08:59:28,021 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:28,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:28,022 INFO L82 PathProgramCache]: Analyzing trace with hash -693910418, now seen corresponding path program 38 times [2020-10-28 08:59:28,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:28,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585086931] [2020-10-28 08:59:28,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:28,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:29,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:29,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 08:59:29,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:29,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-10-28 08:59:29,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:29,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:29,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 08:59:29,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:29,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 08:59:29,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:30,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:30,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:30,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:30,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:30,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:30,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:30,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:30,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:30,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:30,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:30,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:30,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:30,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585086931] [2020-10-28 08:59:30,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:30,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 08:59:30,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787542989] [2020-10-28 08:59:30,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 08:59:30,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:30,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 08:59:30,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 08:59:30,299 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 42 states. [2020-10-28 08:59:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:30,456 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-28 08:59:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 08:59:30,457 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 53 [2020-10-28 08:59:30,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:30,458 INFO L225 Difference]: With dead ends: 72 [2020-10-28 08:59:30,458 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 08:59:30,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 08:59:30,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 08:59:30,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-28 08:59:30,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 08:59:30,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-28 08:59:30,463 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 53 [2020-10-28 08:59:30,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:30,463 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-28 08:59:30,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 08:59:30,463 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-28 08:59:30,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 08:59:30,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:30,464 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:30,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 08:59:30,464 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:30,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:30,465 INFO L82 PathProgramCache]: Analyzing trace with hash -520672584, now seen corresponding path program 39 times [2020-10-28 08:59:30,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:30,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233602458] [2020-10-28 08:59:30,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:30,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:31,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:31,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 08:59:31,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:31,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 997 [2020-10-28 08:59:31,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:31,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:31,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 08:59:31,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:31,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 08:59:31,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:32,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:32,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:32,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:32,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:32,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:32,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:32,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:32,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:32,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:32,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:32,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:32,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:32,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233602458] [2020-10-28 08:59:32,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:32,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 08:59:32,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605268265] [2020-10-28 08:59:32,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 08:59:32,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:32,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 08:59:32,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 08:59:32,753 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 43 states. [2020-10-28 08:59:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:33,010 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-28 08:59:33,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 08:59:33,011 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 54 [2020-10-28 08:59:33,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:33,011 INFO L225 Difference]: With dead ends: 73 [2020-10-28 08:59:33,012 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 08:59:33,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 08:59:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 08:59:33,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-28 08:59:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 08:59:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-28 08:59:33,016 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 54 [2020-10-28 08:59:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:33,017 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-28 08:59:33,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 08:59:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-28 08:59:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 08:59:33,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:33,018 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:33,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 08:59:33,018 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:33,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:33,018 INFO L82 PathProgramCache]: Analyzing trace with hash 554732974, now seen corresponding path program 40 times [2020-10-28 08:59:33,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:33,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638647152] [2020-10-28 08:59:33,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:33,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:33,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:33,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 08:59:33,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:33,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 906 [2020-10-28 08:59:33,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:33,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:33,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 08:59:33,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:33,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 08:59:33,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:35,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:35,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:35,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:35,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:35,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:35,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:35,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:35,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:35,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:35,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:35,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:35,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:35,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638647152] [2020-10-28 08:59:35,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:35,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-28 08:59:35,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389735387] [2020-10-28 08:59:35,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-28 08:59:35,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:35,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-28 08:59:35,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 08:59:35,321 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 44 states. [2020-10-28 08:59:35,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:35,619 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-28 08:59:35,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-28 08:59:35,619 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 55 [2020-10-28 08:59:35,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:35,620 INFO L225 Difference]: With dead ends: 74 [2020-10-28 08:59:35,620 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 08:59:35,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 08:59:35,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 08:59:35,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-28 08:59:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 08:59:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-28 08:59:35,626 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 55 [2020-10-28 08:59:35,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:35,626 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-28 08:59:35,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-28 08:59:35,626 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-28 08:59:35,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 08:59:35,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:35,627 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:35,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 08:59:35,627 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:35,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:35,628 INFO L82 PathProgramCache]: Analyzing trace with hash -467433096, now seen corresponding path program 41 times [2020-10-28 08:59:35,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:35,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348539969] [2020-10-28 08:59:35,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:35,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:36,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:36,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 08:59:36,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:36,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 954 [2020-10-28 08:59:36,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:36,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:36,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-28 08:59:36,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:36,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 08:59:36,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:37,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:37,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:37,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:37,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:37,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:37,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:59:37,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:37,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:37,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:37,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:37,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:37,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:37,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348539969] [2020-10-28 08:59:37,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:37,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-28 08:59:37,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915119161] [2020-10-28 08:59:37,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-28 08:59:37,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:37,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-28 08:59:37,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 08:59:37,997 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 45 states. [2020-10-28 08:59:38,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:38,268 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-10-28 08:59:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-28 08:59:38,269 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 56 [2020-10-28 08:59:38,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:38,270 INFO L225 Difference]: With dead ends: 75 [2020-10-28 08:59:38,270 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 08:59:38,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 08:59:38,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 08:59:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-28 08:59:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 08:59:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-28 08:59:38,276 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 56 [2020-10-28 08:59:38,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:38,276 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-28 08:59:38,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-28 08:59:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-28 08:59:38,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 08:59:38,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:38,277 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:38,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 08:59:38,278 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:38,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:38,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2089810194, now seen corresponding path program 42 times [2020-10-28 08:59:38,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:38,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242335090] [2020-10-28 08:59:38,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:38,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:39,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:39,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 08:59:39,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:39,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 825 [2020-10-28 08:59:39,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:39,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:39,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-28 08:59:39,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:39,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 08:59:39,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:40,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:40,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:40,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:40,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:40,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:40,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:40,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:40,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:40,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:40,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:40,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:40,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:40,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242335090] [2020-10-28 08:59:40,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:40,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 08:59:40,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380598425] [2020-10-28 08:59:40,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 08:59:40,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:40,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 08:59:40,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 08:59:40,618 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 46 states. [2020-10-28 08:59:40,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:40,766 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-28 08:59:40,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-28 08:59:40,766 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 57 [2020-10-28 08:59:40,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:40,768 INFO L225 Difference]: With dead ends: 76 [2020-10-28 08:59:40,768 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 08:59:40,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 08:59:40,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 08:59:40,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-28 08:59:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 08:59:40,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-28 08:59:40,773 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 57 [2020-10-28 08:59:40,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:40,773 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-28 08:59:40,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 08:59:40,773 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-28 08:59:40,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 08:59:40,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:40,774 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:40,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 08:59:40,774 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:40,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:40,775 INFO L82 PathProgramCache]: Analyzing trace with hash -843892680, now seen corresponding path program 43 times [2020-10-28 08:59:40,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:40,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139781180] [2020-10-28 08:59:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:40,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:41,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:41,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 08:59:41,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:41,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-10-28 08:59:41,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:41,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:41,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-28 08:59:41,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:41,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 08:59:41,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:43,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:43,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:43,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:43,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:43,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:43,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:43,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:59:43,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:43,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:43,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:43,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:43,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:43,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:43,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139781180] [2020-10-28 08:59:43,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:43,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-28 08:59:43,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814405057] [2020-10-28 08:59:43,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-28 08:59:43,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:43,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-28 08:59:43,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 08:59:43,343 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 47 states. [2020-10-28 08:59:43,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:43,702 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-28 08:59:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 08:59:43,703 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 58 [2020-10-28 08:59:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:43,704 INFO L225 Difference]: With dead ends: 77 [2020-10-28 08:59:43,704 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 08:59:43,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 08:59:43,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 08:59:43,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-28 08:59:43,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 08:59:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-10-28 08:59:43,709 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 58 [2020-10-28 08:59:43,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:43,710 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-10-28 08:59:43,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-28 08:59:43,710 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-10-28 08:59:43,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 08:59:43,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:43,710 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:43,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 08:59:43,711 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:43,711 INFO L82 PathProgramCache]: Analyzing trace with hash -875155410, now seen corresponding path program 44 times [2020-10-28 08:59:43,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:43,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366846294] [2020-10-28 08:59:43,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:43,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:44,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:44,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 08:59:44,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:44,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 914 [2020-10-28 08:59:44,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:44,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:44,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 08:59:44,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:44,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 08:59:44,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:46,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:46,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:46,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:46,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:46,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:46,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:46,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:46,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:46,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:46,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:46,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:46,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:46,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366846294] [2020-10-28 08:59:46,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:46,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-28 08:59:46,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865164387] [2020-10-28 08:59:46,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-28 08:59:46,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:46,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-28 08:59:46,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 08:59:46,221 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 48 states. [2020-10-28 08:59:46,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:46,533 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-28 08:59:46,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-28 08:59:46,533 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 59 [2020-10-28 08:59:46,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:46,534 INFO L225 Difference]: With dead ends: 78 [2020-10-28 08:59:46,535 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 08:59:46,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 08:59:46,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 08:59:46,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-28 08:59:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 08:59:46,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-28 08:59:46,540 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 59 [2020-10-28 08:59:46,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:46,540 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-28 08:59:46,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-28 08:59:46,540 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-28 08:59:46,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 08:59:46,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:46,541 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:46,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 08:59:46,541 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:46,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:46,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1844300040, now seen corresponding path program 45 times [2020-10-28 08:59:46,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:46,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41647] [2020-10-28 08:59:46,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:46,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:47,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:47,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 08:59:47,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:47,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 905 [2020-10-28 08:59:47,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:47,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:47,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-28 08:59:47,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:47,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 08:59:47,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:49,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:49,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:49,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:49,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:49,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:49,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:49,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:49,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:49,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:49,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:49,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:49,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:49,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41647] [2020-10-28 08:59:49,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:49,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-28 08:59:49,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211063385] [2020-10-28 08:59:49,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-28 08:59:49,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:49,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-28 08:59:49,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 08:59:49,177 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 49 states. [2020-10-28 08:59:49,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:49,408 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-28 08:59:49,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-28 08:59:49,409 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 60 [2020-10-28 08:59:49,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:49,410 INFO L225 Difference]: With dead ends: 79 [2020-10-28 08:59:49,410 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 08:59:49,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 08:59:49,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 08:59:49,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-28 08:59:49,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 08:59:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-10-28 08:59:49,419 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 60 [2020-10-28 08:59:49,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:49,419 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-10-28 08:59:49,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-28 08:59:49,419 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-10-28 08:59:49,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 08:59:49,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:49,420 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:49,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 08:59:49,420 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:49,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:49,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1823012498, now seen corresponding path program 46 times [2020-10-28 08:59:49,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:49,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640146335] [2020-10-28 08:59:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:49,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:50,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:50,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 08:59:50,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:50,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1068 [2020-10-28 08:59:50,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:50,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:50,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-28 08:59:50,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:50,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 08:59:50,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:52,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:52,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:52,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:52,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:52,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:52,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:52,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:52,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:52,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:52,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:52,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:52,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:52,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640146335] [2020-10-28 08:59:52,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:52,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-28 08:59:52,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638989501] [2020-10-28 08:59:52,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-28 08:59:52,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:52,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-28 08:59:52,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 08:59:52,295 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 50 states. [2020-10-28 08:59:52,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:52,527 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-28 08:59:52,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-28 08:59:52,528 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 61 [2020-10-28 08:59:52,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:52,529 INFO L225 Difference]: With dead ends: 80 [2020-10-28 08:59:52,529 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 08:59:52,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 08:59:52,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 08:59:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 08:59:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 08:59:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-28 08:59:52,534 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 61 [2020-10-28 08:59:52,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:52,535 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-28 08:59:52,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-28 08:59:52,535 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-28 08:59:52,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 08:59:52,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:52,535 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:52,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 08:59:52,536 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:52,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:52,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1163098696, now seen corresponding path program 47 times [2020-10-28 08:59:52,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:52,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087846175] [2020-10-28 08:59:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:52,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:53,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:53,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 08:59:53,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:53,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-10-28 08:59:53,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:53,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:53,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-28 08:59:53,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:53,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 08:59:53,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:55,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:55,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:55,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:55,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:55,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:55,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:59:55,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:55,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:55,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:55,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:55,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:55,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:55,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:55,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087846175] [2020-10-28 08:59:55,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:55,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-28 08:59:55,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011931582] [2020-10-28 08:59:55,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-28 08:59:55,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:55,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-28 08:59:55,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 08:59:55,422 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 51 states. [2020-10-28 08:59:55,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:55,817 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-28 08:59:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-28 08:59:55,818 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 62 [2020-10-28 08:59:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:55,820 INFO L225 Difference]: With dead ends: 81 [2020-10-28 08:59:55,820 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 08:59:55,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 08:59:55,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 08:59:55,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-28 08:59:55,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 08:59:55,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-28 08:59:55,830 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 62 [2020-10-28 08:59:55,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:55,830 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-28 08:59:55,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-28 08:59:55,830 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-28 08:59:55,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 08:59:55,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:55,831 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:55,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 08:59:55,832 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:55,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:55,832 INFO L82 PathProgramCache]: Analyzing trace with hash 2114359982, now seen corresponding path program 48 times [2020-10-28 08:59:55,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:55,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087201796] [2020-10-28 08:59:55,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:55,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:56,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:56,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 08:59:56,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:56,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1067 [2020-10-28 08:59:56,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:56,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:56,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-28 08:59:56,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:59:56,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 08:59:56,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:58,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:58,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:58,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:58,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:58,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:58,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:58,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:58,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:58,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:58,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:58,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:58,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:59:58,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087201796] [2020-10-28 08:59:58,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:58,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-28 08:59:58,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675810485] [2020-10-28 08:59:58,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-28 08:59:58,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:58,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-28 08:59:58,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 08:59:58,828 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 52 states. [2020-10-28 08:59:59,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:59,090 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-28 08:59:59,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-28 08:59:59,091 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 63 [2020-10-28 08:59:59,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:59,094 INFO L225 Difference]: With dead ends: 82 [2020-10-28 08:59:59,094 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 08:59:59,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 08:59:59,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 08:59:59,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-28 08:59:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 08:59:59,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-28 08:59:59,099 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 63 [2020-10-28 08:59:59,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:59,100 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-28 08:59:59,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-28 08:59:59,100 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-28 08:59:59,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 08:59:59,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:59,101 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:59,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 08:59:59,101 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:59,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:59,101 INFO L82 PathProgramCache]: Analyzing trace with hash 636363896, now seen corresponding path program 49 times [2020-10-28 08:59:59,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:59,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967131447] [2020-10-28 08:59:59,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:59,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:00,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:00,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 09:00:00,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:00,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1173 [2020-10-28 09:00:00,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:00,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:00,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-28 09:00:00,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:00,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 09:00:00,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:02,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:02,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:02,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:02,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:02,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:02,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:00:02,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:02,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:02,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:02,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:02,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:02,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:00:02,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967131447] [2020-10-28 09:00:02,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:02,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-28 09:00:02,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146707541] [2020-10-28 09:00:02,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-28 09:00:02,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:02,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-28 09:00:02,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 09:00:02,327 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 53 states. [2020-10-28 09:00:02,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:02,725 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-28 09:00:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-28 09:00:02,726 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 64 [2020-10-28 09:00:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:02,727 INFO L225 Difference]: With dead ends: 83 [2020-10-28 09:00:02,727 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 09:00:02,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 09:00:02,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 09:00:02,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-28 09:00:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 09:00:02,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-28 09:00:02,733 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 64 [2020-10-28 09:00:02,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:02,733 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-28 09:00:02,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-28 09:00:02,733 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-28 09:00:02,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 09:00:02,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:02,734 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:02,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 09:00:02,734 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:02,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:02,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2063125486, now seen corresponding path program 50 times [2020-10-28 09:00:02,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:02,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542083311] [2020-10-28 09:00:02,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:02,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:03,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:03,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 09:00:03,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:03,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1092 [2020-10-28 09:00:03,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:03,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:03,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-28 09:00:03,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:03,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 09:00:03,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:05,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:05,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:05,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:05,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:05,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:05,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:05,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:05,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:05,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:05,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:05,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:05,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:00:05,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542083311] [2020-10-28 09:00:05,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:05,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-28 09:00:05,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297404363] [2020-10-28 09:00:05,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-28 09:00:05,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:05,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-28 09:00:05,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 09:00:05,924 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 54 states. [2020-10-28 09:00:06,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:06,330 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-28 09:00:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-28 09:00:06,331 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 65 [2020-10-28 09:00:06,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:06,333 INFO L225 Difference]: With dead ends: 84 [2020-10-28 09:00:06,333 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 09:00:06,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 09:00:06,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 09:00:06,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-28 09:00:06,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 09:00:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-28 09:00:06,339 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 65 [2020-10-28 09:00:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:06,339 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-28 09:00:06,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-28 09:00:06,339 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-28 09:00:06,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:00:06,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:06,340 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:06,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 09:00:06,340 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:06,341 INFO L82 PathProgramCache]: Analyzing trace with hash -951905480, now seen corresponding path program 51 times [2020-10-28 09:00:06,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:06,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329397780] [2020-10-28 09:00:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:06,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:07,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:07,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 09:00:07,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:07,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1168 [2020-10-28 09:00:07,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:07,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:07,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-28 09:00:07,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:07,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 09:00:07,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:09,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:09,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:09,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:09,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:09,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:09,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:09,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:09,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:09,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:09,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:09,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:09,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:00:09,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329397780] [2020-10-28 09:00:09,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:09,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-28 09:00:09,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045969967] [2020-10-28 09:00:09,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-28 09:00:09,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:09,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-28 09:00:09,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 09:00:09,692 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 55 states. [2020-10-28 09:00:09,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:09,857 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-28 09:00:09,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-28 09:00:09,858 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 66 [2020-10-28 09:00:09,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:09,859 INFO L225 Difference]: With dead ends: 85 [2020-10-28 09:00:09,859 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 09:00:09,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 09:00:09,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 09:00:09,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-28 09:00:09,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 09:00:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-28 09:00:09,866 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 66 [2020-10-28 09:00:09,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:09,866 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-28 09:00:09,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-28 09:00:09,866 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-28 09:00:09,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 09:00:09,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:09,867 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:09,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 09:00:09,868 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:09,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:09,868 INFO L82 PathProgramCache]: Analyzing trace with hash 71415086, now seen corresponding path program 52 times [2020-10-28 09:00:09,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:09,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286841016] [2020-10-28 09:00:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:09,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:11,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:11,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 09:00:11,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:11,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1179 [2020-10-28 09:00:11,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:11,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:11,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-28 09:00:11,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:11,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:00:11,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:13,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:13,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:13,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:13,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:13,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:13,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:13,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:13,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:13,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:13,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:13,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:13,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:00:13,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286841016] [2020-10-28 09:00:13,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:13,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-28 09:00:13,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257566160] [2020-10-28 09:00:13,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-28 09:00:13,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:13,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-28 09:00:13,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-28 09:00:13,280 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 56 states. [2020-10-28 09:00:13,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:13,704 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-10-28 09:00:13,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-28 09:00:13,704 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 67 [2020-10-28 09:00:13,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:13,705 INFO L225 Difference]: With dead ends: 86 [2020-10-28 09:00:13,705 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 09:00:13,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-28 09:00:13,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 09:00:13,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-28 09:00:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 09:00:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-28 09:00:13,710 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 67 [2020-10-28 09:00:13,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:13,710 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-28 09:00:13,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-28 09:00:13,710 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-28 09:00:13,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 09:00:13,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:13,711 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:13,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 09:00:13,711 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:13,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:13,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1729581560, now seen corresponding path program 53 times [2020-10-28 09:00:13,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:13,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943239871] [2020-10-28 09:00:13,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:13,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:15,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:15,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:00:15,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:15,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1293 [2020-10-28 09:00:15,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:15,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:15,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-28 09:00:15,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:15,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 09:00:15,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:17,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:17,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:17,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:17,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:17,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:17,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:17,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:17,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:17,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:17,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:17,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:17,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:00:17,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943239871] [2020-10-28 09:00:17,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:17,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-28 09:00:17,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773433655] [2020-10-28 09:00:17,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-28 09:00:17,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:17,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-28 09:00:17,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 09:00:17,360 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 57 states. [2020-10-28 09:00:17,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:17,793 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-10-28 09:00:17,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-28 09:00:17,794 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 68 [2020-10-28 09:00:17,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:17,795 INFO L225 Difference]: With dead ends: 87 [2020-10-28 09:00:17,795 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 09:00:17,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 09:00:17,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 09:00:17,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-28 09:00:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 09:00:17,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-28 09:00:17,801 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 68 [2020-10-28 09:00:17,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:17,801 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-28 09:00:17,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-28 09:00:17,801 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-28 09:00:17,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:00:17,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:17,802 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:17,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 09:00:17,802 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:17,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:17,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1593134702, now seen corresponding path program 54 times [2020-10-28 09:00:17,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:17,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818807901] [2020-10-28 09:00:17,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:17,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:19,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:19,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 09:00:19,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:19,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1283 [2020-10-28 09:00:19,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:19,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:19,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-28 09:00:19,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:19,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 09:00:19,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:21,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:21,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:21,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:21,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:21,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:21,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:21,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:21,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:21,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:21,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:21,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:21,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:00:21,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818807901] [2020-10-28 09:00:21,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:21,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-28 09:00:21,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307091614] [2020-10-28 09:00:21,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-28 09:00:21,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:21,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-28 09:00:21,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 09:00:21,520 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 58 states. [2020-10-28 09:00:21,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:21,835 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-28 09:00:21,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-28 09:00:21,836 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 69 [2020-10-28 09:00:21,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:21,837 INFO L225 Difference]: With dead ends: 88 [2020-10-28 09:00:21,837 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 09:00:21,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 09:00:21,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 09:00:21,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-28 09:00:21,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 09:00:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-28 09:00:21,842 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 69 [2020-10-28 09:00:21,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:21,842 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-28 09:00:21,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-28 09:00:21,842 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-28 09:00:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 09:00:21,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:21,843 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:21,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 09:00:21,843 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:21,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:21,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1658249400, now seen corresponding path program 55 times [2020-10-28 09:00:21,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:21,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997442325] [2020-10-28 09:00:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:21,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:23,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:23,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 09:00:23,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:23,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1321 [2020-10-28 09:00:23,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:23,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:23,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-28 09:00:23,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:23,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 09:00:23,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:25,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:25,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:25,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:25,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:25,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:25,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:25,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:25,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:25,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:25,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:25,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:25,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:00:25,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997442325] [2020-10-28 09:00:25,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:25,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-28 09:00:25,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974095632] [2020-10-28 09:00:25,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-28 09:00:25,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:25,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-28 09:00:25,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 09:00:25,645 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 59 states. [2020-10-28 09:00:25,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:25,832 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-28 09:00:25,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-28 09:00:25,833 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 70 [2020-10-28 09:00:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:25,834 INFO L225 Difference]: With dead ends: 89 [2020-10-28 09:00:25,834 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 09:00:25,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 09:00:25,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 09:00:25,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-28 09:00:25,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 09:00:25,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-28 09:00:25,838 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 70 [2020-10-28 09:00:25,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:25,838 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-28 09:00:25,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-28 09:00:25,838 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-28 09:00:25,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 09:00:25,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:25,839 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:25,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 09:00:25,839 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:25,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:25,840 INFO L82 PathProgramCache]: Analyzing trace with hash -618162258, now seen corresponding path program 56 times [2020-10-28 09:00:25,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:25,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715924423] [2020-10-28 09:00:25,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:25,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:27,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:27,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 09:00:27,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:27,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1458 [2020-10-28 09:00:27,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:27,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:27,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-28 09:00:27,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:27,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 09:00:27,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:29,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:29,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:29,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:29,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:29,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:29,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:29,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:29,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:29,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:29,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:29,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:00:29,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715924423] [2020-10-28 09:00:29,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:29,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-28 09:00:29,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759278398] [2020-10-28 09:00:29,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-28 09:00:29,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:29,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-28 09:00:29,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 09:00:29,892 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 60 states. [2020-10-28 09:00:30,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:30,329 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-28 09:00:30,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-28 09:00:30,330 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 71 [2020-10-28 09:00:30,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:30,331 INFO L225 Difference]: With dead ends: 90 [2020-10-28 09:00:30,332 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 09:00:30,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 09:00:30,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 09:00:30,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-28 09:00:30,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 09:00:30,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-28 09:00:30,336 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 71 [2020-10-28 09:00:30,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:30,337 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-28 09:00:30,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-28 09:00:30,337 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-28 09:00:30,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 09:00:30,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:30,338 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:30,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 09:00:30,338 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:30,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:30,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1827520376, now seen corresponding path program 57 times [2020-10-28 09:00:30,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:30,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70681665] [2020-10-28 09:00:30,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:30,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:31,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:31,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 09:00:31,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:31,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1563 [2020-10-28 09:00:31,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:31,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:31,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-28 09:00:31,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:31,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 09:00:31,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:34,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:34,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:34,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:34,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:34,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:34,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:34,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:34,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:34,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:34,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:34,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:34,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:00:34,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70681665] [2020-10-28 09:00:34,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:34,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-28 09:00:34,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532525925] [2020-10-28 09:00:34,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-28 09:00:34,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:34,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-28 09:00:34,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 09:00:34,599 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 61 states. [2020-10-28 09:00:35,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:35,067 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2020-10-28 09:00:35,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-28 09:00:35,068 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 72 [2020-10-28 09:00:35,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:35,069 INFO L225 Difference]: With dead ends: 91 [2020-10-28 09:00:35,069 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 09:00:35,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 09:00:35,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 09:00:35,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-28 09:00:35,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 09:00:35,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-10-28 09:00:35,074 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 72 [2020-10-28 09:00:35,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:35,075 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-10-28 09:00:35,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-28 09:00:35,075 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-10-28 09:00:35,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 09:00:35,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:35,075 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:35,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-28 09:00:35,076 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:35,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:35,076 INFO L82 PathProgramCache]: Analyzing trace with hash 334270702, now seen corresponding path program 58 times [2020-10-28 09:00:35,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:35,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388637617] [2020-10-28 09:00:35,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:35,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:36,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:36,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 09:00:36,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:36,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1442 [2020-10-28 09:00:36,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:36,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:36,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-28 09:00:36,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:36,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 09:00:36,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:39,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:39,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:39,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:39,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:39,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:39,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:39,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:39,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:39,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:39,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:39,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:39,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:00:39,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388637617] [2020-10-28 09:00:39,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:39,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-28 09:00:39,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30210187] [2020-10-28 09:00:39,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-28 09:00:39,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:39,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-28 09:00:39,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-28 09:00:39,325 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 62 states. [2020-10-28 09:00:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:39,798 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-28 09:00:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-28 09:00:39,799 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 73 [2020-10-28 09:00:39,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:39,800 INFO L225 Difference]: With dead ends: 92 [2020-10-28 09:00:39,800 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 09:00:39,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-28 09:00:39,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 09:00:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-28 09:00:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 09:00:39,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-28 09:00:39,804 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 73 [2020-10-28 09:00:39,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:39,804 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-28 09:00:39,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-28 09:00:39,804 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-28 09:00:39,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 09:00:39,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:39,805 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:39,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-28 09:00:39,805 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:39,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:39,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1288171064, now seen corresponding path program 59 times [2020-10-28 09:00:39,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:39,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226970771] [2020-10-28 09:00:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:39,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:41,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:41,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 09:00:41,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:41,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1565 [2020-10-28 09:00:41,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:41,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:41,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-28 09:00:41,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:41,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 09:00:41,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:44,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:44,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:44,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:44,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:44,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:44,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:44,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:44,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:44,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:44,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:44,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:44,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:00:44,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226970771] [2020-10-28 09:00:44,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:44,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-28 09:00:44,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888040970] [2020-10-28 09:00:44,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-28 09:00:44,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:44,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-28 09:00:44,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 09:00:44,250 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 63 states. [2020-10-28 09:00:44,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:44,737 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-28 09:00:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-28 09:00:44,738 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 74 [2020-10-28 09:00:44,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:44,739 INFO L225 Difference]: With dead ends: 93 [2020-10-28 09:00:44,739 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 09:00:44,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 09:00:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 09:00:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-28 09:00:44,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 09:00:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-10-28 09:00:44,744 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 74 [2020-10-28 09:00:44,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:44,744 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-10-28 09:00:44,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-28 09:00:44,745 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-10-28 09:00:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 09:00:44,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:44,745 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:44,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-28 09:00:44,746 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:44,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:44,746 INFO L82 PathProgramCache]: Analyzing trace with hash 794311214, now seen corresponding path program 60 times [2020-10-28 09:00:44,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:44,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741351160] [2020-10-28 09:00:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:44,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:46,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:46,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 09:00:46,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:46,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1584 [2020-10-28 09:00:46,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:46,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:46,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-28 09:00:46,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:46,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 09:00:46,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:49,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:49,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:49,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:49,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:49,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:49,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:49,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:49,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:49,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:49,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:49,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:49,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:00:49,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741351160] [2020-10-28 09:00:49,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:49,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-28 09:00:49,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7234626] [2020-10-28 09:00:49,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-28 09:00:49,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:49,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-28 09:00:49,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-28 09:00:49,264 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 64 states. [2020-10-28 09:00:49,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:49,772 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-28 09:00:49,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-28 09:00:49,773 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 75 [2020-10-28 09:00:49,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:49,774 INFO L225 Difference]: With dead ends: 94 [2020-10-28 09:00:49,774 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 09:00:49,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-28 09:00:49,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 09:00:49,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-28 09:00:49,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 09:00:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-28 09:00:49,779 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 75 [2020-10-28 09:00:49,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:49,780 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-28 09:00:49,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-28 09:00:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-28 09:00:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 09:00:49,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:49,780 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:49,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-28 09:00:49,781 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:49,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:49,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1630442248, now seen corresponding path program 61 times [2020-10-28 09:00:49,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:49,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071613209] [2020-10-28 09:00:49,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:49,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:51,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:51,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 09:00:51,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:51,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1677 [2020-10-28 09:00:51,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:51,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:51,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-28 09:00:51,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:51,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 09:00:51,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:54,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:54,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:54,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:54,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:54,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:54,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:54,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:54,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:54,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:54,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:54,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:54,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:00:54,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071613209] [2020-10-28 09:00:54,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:54,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-28 09:00:54,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675931122] [2020-10-28 09:00:54,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-28 09:00:54,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:54,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-28 09:00:54,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 09:00:54,512 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 65 states. [2020-10-28 09:00:55,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:55,013 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-10-28 09:00:55,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-28 09:00:55,014 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 76 [2020-10-28 09:00:55,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:55,015 INFO L225 Difference]: With dead ends: 95 [2020-10-28 09:00:55,015 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 09:00:55,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 09:00:55,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 09:00:55,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-28 09:00:55,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 09:00:55,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-28 09:00:55,020 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 76 [2020-10-28 09:00:55,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:55,020 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-28 09:00:55,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-28 09:00:55,020 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-28 09:00:55,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 09:00:55,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:55,020 INFO L422 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:55,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-28 09:00:55,021 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:55,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:55,021 INFO L82 PathProgramCache]: Analyzing trace with hash 511611758, now seen corresponding path program 62 times [2020-10-28 09:00:55,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:55,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239688111] [2020-10-28 09:00:55,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:55,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:55,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:56,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:56,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 09:00:56,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:56,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1659 [2020-10-28 09:00:56,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:56,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:56,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-28 09:00:56,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:00:56,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 09:00:56,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:59,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:59,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:59,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:59,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:59,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:59,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:59,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:59,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:59,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:59,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:59,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:59,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:00:59,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239688111] [2020-10-28 09:00:59,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:59,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-28 09:00:59,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279566999] [2020-10-28 09:00:59,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-28 09:00:59,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:59,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-28 09:00:59,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-28 09:00:59,856 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 66 states. [2020-10-28 09:01:00,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:00,370 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-10-28 09:01:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-28 09:01:00,371 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 77 [2020-10-28 09:01:00,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:00,372 INFO L225 Difference]: With dead ends: 96 [2020-10-28 09:01:00,372 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 09:01:00,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-28 09:01:00,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 09:01:00,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-28 09:01:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 09:01:00,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-28 09:01:00,377 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 77 [2020-10-28 09:01:00,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:00,378 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-28 09:01:00,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-28 09:01:00,378 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-28 09:01:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 09:01:00,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:00,378 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:00,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-28 09:01:00,379 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:00,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:00,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1804190792, now seen corresponding path program 63 times [2020-10-28 09:01:00,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:00,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63600733] [2020-10-28 09:01:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:00,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:02,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:02,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 09:01:02,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:02,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1867 [2020-10-28 09:01:02,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:02,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:02,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-28 09:01:02,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:02,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 09:01:02,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:05,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:05,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:05,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:05,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:05,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:05,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:05,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:05,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:05,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:05,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:05,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:05,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:01:05,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63600733] [2020-10-28 09:01:05,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:05,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-28 09:01:05,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101972602] [2020-10-28 09:01:05,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-28 09:01:05,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:05,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-28 09:01:05,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 09:01:05,631 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 67 states. [2020-10-28 09:01:06,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:06,139 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-10-28 09:01:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-28 09:01:06,140 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 78 [2020-10-28 09:01:06,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:06,142 INFO L225 Difference]: With dead ends: 97 [2020-10-28 09:01:06,142 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 09:01:06,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 09:01:06,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 09:01:06,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-28 09:01:06,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 09:01:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-10-28 09:01:06,147 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 78 [2020-10-28 09:01:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:06,147 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-10-28 09:01:06,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-28 09:01:06,148 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-10-28 09:01:06,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 09:01:06,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:06,148 INFO L422 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:06,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-28 09:01:06,148 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:06,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:06,149 INFO L82 PathProgramCache]: Analyzing trace with hash -579625810, now seen corresponding path program 64 times [2020-10-28 09:01:06,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:06,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439868239] [2020-10-28 09:01:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:06,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:08,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:08,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 09:01:08,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:08,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1847 [2020-10-28 09:01:08,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:08,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:08,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-28 09:01:08,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:08,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 09:01:08,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:11,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:11,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:11,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:11,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:11,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:11,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:11,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:11,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:11,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:11,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:11,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:11,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:01:11,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439868239] [2020-10-28 09:01:11,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:11,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-28 09:01:11,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516066434] [2020-10-28 09:01:11,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-28 09:01:11,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:11,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-28 09:01:11,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-28 09:01:11,417 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 68 states. [2020-10-28 09:01:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:11,652 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-28 09:01:11,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-28 09:01:11,652 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 79 [2020-10-28 09:01:11,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:11,654 INFO L225 Difference]: With dead ends: 98 [2020-10-28 09:01:11,654 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 09:01:11,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-28 09:01:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 09:01:11,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-28 09:01:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 09:01:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-28 09:01:11,659 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 79 [2020-10-28 09:01:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:11,660 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-28 09:01:11,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-28 09:01:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-28 09:01:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 09:01:11,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:11,661 INFO L422 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:11,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-28 09:01:11,661 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:11,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:11,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1272817032, now seen corresponding path program 65 times [2020-10-28 09:01:11,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:11,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475329599] [2020-10-28 09:01:11,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:11,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:13,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:13,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 09:01:13,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:13,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2152 [2020-10-28 09:01:13,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:13,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:13,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-28 09:01:13,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:13,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 09:01:13,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:17,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:17,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:17,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:17,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:17,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:17,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:17,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:17,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:17,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:17,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:17,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:17,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:01:17,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475329599] [2020-10-28 09:01:17,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:17,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-28 09:01:17,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019838525] [2020-10-28 09:01:17,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-28 09:01:17,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:17,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-28 09:01:17,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 09:01:17,354 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 69 states. [2020-10-28 09:01:17,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:17,757 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-28 09:01:17,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-28 09:01:17,758 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 80 [2020-10-28 09:01:17,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:17,759 INFO L225 Difference]: With dead ends: 99 [2020-10-28 09:01:17,759 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 09:01:17,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 09:01:17,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 09:01:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-28 09:01:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 09:01:17,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-28 09:01:17,764 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 80 [2020-10-28 09:01:17,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:17,764 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-28 09:01:17,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-28 09:01:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-28 09:01:17,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 09:01:17,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:17,765 INFO L422 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:17,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-28 09:01:17,765 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:17,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:17,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1286908434, now seen corresponding path program 66 times [2020-10-28 09:01:17,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:17,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651630246] [2020-10-28 09:01:17,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:17,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:20,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:20,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 09:01:20,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:20,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2235 [2020-10-28 09:01:20,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:20,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-28 09:01:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 09:01:20,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:23,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:23,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:23,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:23,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:23,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:23,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:23,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:23,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:23,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:23,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:23,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:23,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:01:23,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651630246] [2020-10-28 09:01:23,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:23,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-28 09:01:23,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829205791] [2020-10-28 09:01:23,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-28 09:01:23,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:23,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-28 09:01:23,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-28 09:01:23,658 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 70 states. [2020-10-28 09:01:24,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:24,193 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-10-28 09:01:24,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-28 09:01:24,194 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 81 [2020-10-28 09:01:24,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:24,195 INFO L225 Difference]: With dead ends: 100 [2020-10-28 09:01:24,195 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 09:01:24,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-28 09:01:24,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 09:01:24,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-28 09:01:24,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 09:01:24,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-28 09:01:24,201 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 81 [2020-10-28 09:01:24,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:24,202 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-28 09:01:24,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-28 09:01:24,202 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-28 09:01:24,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 09:01:24,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:24,202 INFO L422 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:24,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-28 09:01:24,203 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:24,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:24,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1723741896, now seen corresponding path program 67 times [2020-10-28 09:01:24,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:24,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354458746] [2020-10-28 09:01:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:24,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:26,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:26,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 09:01:26,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:26,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2138 [2020-10-28 09:01:26,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:26,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:26,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-28 09:01:26,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:26,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 09:01:26,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:30,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:30,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:30,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:30,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:30,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:30,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:30,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:30,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:30,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:30,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:30,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:30,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:01:30,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354458746] [2020-10-28 09:01:30,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:30,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-28 09:01:30,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715932716] [2020-10-28 09:01:30,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-28 09:01:30,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:30,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-28 09:01:30,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-28 09:01:30,049 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 71 states. [2020-10-28 09:01:30,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:30,624 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-10-28 09:01:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-28 09:01:30,625 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 82 [2020-10-28 09:01:30,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:30,626 INFO L225 Difference]: With dead ends: 101 [2020-10-28 09:01:30,626 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 09:01:30,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-28 09:01:30,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 09:01:30,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-28 09:01:30,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 09:01:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-10-28 09:01:30,631 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 82 [2020-10-28 09:01:30,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:30,631 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-10-28 09:01:30,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-28 09:01:30,631 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-10-28 09:01:30,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 09:01:30,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:30,632 INFO L422 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:30,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-28 09:01:30,632 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:30,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:30,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1914289966, now seen corresponding path program 68 times [2020-10-28 09:01:30,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:30,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812620869] [2020-10-28 09:01:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:30,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:32,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:32,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 09:01:32,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:32,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2050 [2020-10-28 09:01:32,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:32,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:32,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-28 09:01:32,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:32,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 09:01:32,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:36,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:36,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:36,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:36,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:36,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:36,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:36,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:36,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:36,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:36,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:36,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:36,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:01:36,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812620869] [2020-10-28 09:01:36,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:36,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-28 09:01:36,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144241638] [2020-10-28 09:01:36,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-28 09:01:36,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:36,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-28 09:01:36,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-28 09:01:36,556 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 72 states. [2020-10-28 09:01:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:36,867 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-10-28 09:01:36,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-28 09:01:36,868 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 83 [2020-10-28 09:01:36,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:36,869 INFO L225 Difference]: With dead ends: 102 [2020-10-28 09:01:36,869 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 09:01:36,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-28 09:01:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 09:01:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-28 09:01:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 09:01:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-28 09:01:36,874 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 83 [2020-10-28 09:01:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:36,874 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-28 09:01:36,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-28 09:01:36,875 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-28 09:01:36,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 09:01:36,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:36,875 INFO L422 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:36,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-28 09:01:36,876 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:36,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:36,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1270839304, now seen corresponding path program 69 times [2020-10-28 09:01:36,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:36,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641815140] [2020-10-28 09:01:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:36,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:39,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:39,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 09:01:39,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:39,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2172 [2020-10-28 09:01:39,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:39,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:39,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-28 09:01:39,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:39,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 09:01:39,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:43,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:43,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:43,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:43,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:43,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:43,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:43,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:43,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:43,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:43,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:43,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:43,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:01:43,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641815140] [2020-10-28 09:01:43,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:43,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-28 09:01:43,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632595508] [2020-10-28 09:01:43,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-28 09:01:43,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:43,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-28 09:01:43,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-28 09:01:43,060 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 73 states. [2020-10-28 09:01:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:43,630 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2020-10-28 09:01:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-28 09:01:43,631 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 84 [2020-10-28 09:01:43,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:43,631 INFO L225 Difference]: With dead ends: 103 [2020-10-28 09:01:43,632 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 09:01:43,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-28 09:01:43,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 09:01:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-28 09:01:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 09:01:43,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-10-28 09:01:43,637 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 84 [2020-10-28 09:01:43,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:43,637 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-10-28 09:01:43,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-28 09:01:43,637 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-10-28 09:01:43,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 09:01:43,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:43,638 INFO L422 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:43,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-28 09:01:43,638 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:43,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:43,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1225598866, now seen corresponding path program 70 times [2020-10-28 09:01:43,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:43,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937633915] [2020-10-28 09:01:43,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:43,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:46,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:46,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 09:01:46,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:46,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2449 [2020-10-28 09:01:46,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:46,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:46,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-28 09:01:46,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:46,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 09:01:46,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:50,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:50,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:50,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:50,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:50,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:50,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:50,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:50,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:50,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:50,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:50,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:50,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:01:50,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937633915] [2020-10-28 09:01:50,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:50,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-28 09:01:50,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426268981] [2020-10-28 09:01:50,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-28 09:01:50,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:50,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-28 09:01:50,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-28 09:01:50,224 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 74 states. [2020-10-28 09:01:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:50,779 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-10-28 09:01:50,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-28 09:01:50,780 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 85 [2020-10-28 09:01:50,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:50,781 INFO L225 Difference]: With dead ends: 104 [2020-10-28 09:01:50,781 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 09:01:50,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-28 09:01:50,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 09:01:50,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-28 09:01:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 09:01:50,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-28 09:01:50,786 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 85 [2020-10-28 09:01:50,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:50,786 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-28 09:01:50,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-28 09:01:50,786 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-28 09:01:50,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 09:01:50,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:50,787 INFO L422 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:50,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-28 09:01:50,787 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:50,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:50,787 INFO L82 PathProgramCache]: Analyzing trace with hash 176854712, now seen corresponding path program 71 times [2020-10-28 09:01:50,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:50,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443828601] [2020-10-28 09:01:50,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:50,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:53,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:53,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 09:01:53,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:53,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2246 [2020-10-28 09:01:53,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:53,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:53,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-28 09:01:53,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:01:53,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 09:01:53,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:57,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:57,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:57,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:57,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:57,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:57,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:57,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:57,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:57,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:57,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:57,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:57,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:01:57,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443828601] [2020-10-28 09:01:57,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:57,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-28 09:01:57,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331594081] [2020-10-28 09:01:57,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-28 09:01:57,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:57,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-28 09:01:57,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-28 09:01:57,233 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 75 states. [2020-10-28 09:01:57,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:57,670 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-10-28 09:01:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-28 09:01:57,671 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 86 [2020-10-28 09:01:57,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:57,672 INFO L225 Difference]: With dead ends: 105 [2020-10-28 09:01:57,672 INFO L226 Difference]: Without dead ends: 92 [2020-10-28 09:01:57,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-28 09:01:57,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-28 09:01:57,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-28 09:01:57,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 09:01:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-10-28 09:01:57,676 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 86 [2020-10-28 09:01:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:57,677 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-10-28 09:01:57,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-28 09:01:57,677 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-10-28 09:01:57,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 09:01:57,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:57,677 INFO L422 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:57,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-28 09:01:57,678 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:57,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:57,678 INFO L82 PathProgramCache]: Analyzing trace with hash 703242670, now seen corresponding path program 72 times [2020-10-28 09:01:57,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:57,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739387034] [2020-10-28 09:01:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:57,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:00,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:00,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 09:02:00,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:00,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2380 [2020-10-28 09:02:00,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:00,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:00,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-28 09:02:00,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:00,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 09:02:00,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:04,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:04,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:04,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:04,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:04,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:04,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:04,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:04,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:04,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:04,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:04,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:04,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:02:04,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739387034] [2020-10-28 09:02:04,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:04,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-28 09:02:04,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571336919] [2020-10-28 09:02:04,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-28 09:02:04,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:04,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-28 09:02:04,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2020-10-28 09:02:04,371 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 76 states. [2020-10-28 09:02:05,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:05,006 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2020-10-28 09:02:05,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-28 09:02:05,007 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 87 [2020-10-28 09:02:05,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:05,008 INFO L225 Difference]: With dead ends: 106 [2020-10-28 09:02:05,008 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 09:02:05,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2020-10-28 09:02:05,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 09:02:05,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-28 09:02:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 09:02:05,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-10-28 09:02:05,013 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 87 [2020-10-28 09:02:05,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:05,014 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-10-28 09:02:05,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-28 09:02:05,014 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-10-28 09:02:05,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 09:02:05,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:05,014 INFO L422 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:05,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-28 09:02:05,015 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:05,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:05,015 INFO L82 PathProgramCache]: Analyzing trace with hash -158599816, now seen corresponding path program 73 times [2020-10-28 09:02:05,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:05,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391142245] [2020-10-28 09:02:05,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:05,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:07,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:07,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 09:02:07,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:07,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2332 [2020-10-28 09:02:07,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:07,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:07,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-28 09:02:07,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:07,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 09:02:07,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:11,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:11,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:11,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:11,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:11,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:11,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:02:11,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:11,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:11,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:11,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:11,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:11,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:02:11,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391142245] [2020-10-28 09:02:11,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:11,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-28 09:02:11,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316891459] [2020-10-28 09:02:11,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-28 09:02:11,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:11,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-28 09:02:11,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2020-10-28 09:02:11,764 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 77 states. [2020-10-28 09:02:12,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:12,223 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2020-10-28 09:02:12,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-28 09:02:12,224 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 88 [2020-10-28 09:02:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:12,225 INFO L225 Difference]: With dead ends: 107 [2020-10-28 09:02:12,225 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 09:02:12,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2020-10-28 09:02:12,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 09:02:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-28 09:02:12,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 09:02:12,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-10-28 09:02:12,229 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 88 [2020-10-28 09:02:12,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:12,230 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-10-28 09:02:12,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-28 09:02:12,230 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-10-28 09:02:12,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 09:02:12,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:12,230 INFO L422 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:12,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-28 09:02:12,231 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:12,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:12,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1105913106, now seen corresponding path program 74 times [2020-10-28 09:02:12,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:12,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143829819] [2020-10-28 09:02:12,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:12,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:14,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:14,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 09:02:14,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:14,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2531 [2020-10-28 09:02:14,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:14,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:14,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-28 09:02:14,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:14,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 09:02:14,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:19,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:19,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:19,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:19,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:19,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:19,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:02:19,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:19,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:19,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:19,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:19,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:19,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:02:19,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143829819] [2020-10-28 09:02:19,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:19,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-28 09:02:19,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837423196] [2020-10-28 09:02:19,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-28 09:02:19,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:19,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-28 09:02:19,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2020-10-28 09:02:19,317 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 78 states. [2020-10-28 09:02:19,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:19,903 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-28 09:02:19,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-28 09:02:19,904 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 89 [2020-10-28 09:02:19,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:19,905 INFO L225 Difference]: With dead ends: 108 [2020-10-28 09:02:19,905 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 09:02:19,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2020-10-28 09:02:19,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 09:02:19,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-28 09:02:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-28 09:02:19,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-28 09:02:19,910 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 89 [2020-10-28 09:02:19,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:19,910 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-28 09:02:19,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-28 09:02:19,910 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-28 09:02:19,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 09:02:19,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:19,911 INFO L422 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:19,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-28 09:02:19,911 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:19,911 INFO L82 PathProgramCache]: Analyzing trace with hash -407854024, now seen corresponding path program 75 times [2020-10-28 09:02:19,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:19,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197414146] [2020-10-28 09:02:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:19,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:22,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:22,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 09:02:22,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:22,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2478 [2020-10-28 09:02:22,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:22,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:22,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 77 [2020-10-28 09:02:22,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:22,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 09:02:22,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0