/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=DEEPEST --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/sanfoundry_27_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:14:49,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:14:49,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:14:50,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:14:50,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:14:50,029 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:14:50,031 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:14:50,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:14:50,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:14:50,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:14:50,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:14:50,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:14:50,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:14:50,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:14:50,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:14:50,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:14:50,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:14:50,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:14:50,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:14:50,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:14:50,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:14:50,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:14:50,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:14:50,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:14:50,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:14:50,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:14:50,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:14:50,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:14:50,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:14:50,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:14:50,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:14:50,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:14:50,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:14:50,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:14:50,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:14:50,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:14:50,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:14:50,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:14:50,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:14:50,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:14:50,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:14:50,146 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:14:50,204 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:14:50,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:14:50,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:14:50,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:14:50,210 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:14:50,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:14:50,210 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:14:50,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:14:50,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:14:50,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:14:50,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:14:50,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:14:50,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:14:50,213 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:14:50,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:14:50,213 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:14:50,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:14:50,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:14:50,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:14:50,214 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:14:50,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:14:50,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:14:50,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:14:50,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:14:50,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:14:50,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:14:50,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:14:50,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:14:50,216 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:14:50,216 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:14:50,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:14:50,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:14:50,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:14:50,733 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:14:50,734 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:14:50,735 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2020-10-27 14:14:50,830 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ebd7314d/191967df3e8746a6bd00d8491b7c79cf/FLAG25d855d38 [2020-10-27 14:14:51,339 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:14:51,340 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2020-10-27 14:14:51,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ebd7314d/191967df3e8746a6bd00d8491b7c79cf/FLAG25d855d38 [2020-10-27 14:14:51,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ebd7314d/191967df3e8746a6bd00d8491b7c79cf [2020-10-27 14:14:51,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:14:51,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:14:51,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:14:51,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:14:51,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:14:51,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:14:51" (1/1) ... [2020-10-27 14:14:51,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63c28276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:51, skipping insertion in model container [2020-10-27 14:14:51,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:14:51" (1/1) ... [2020-10-27 14:14:51,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:14:51,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:14:52,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:14:52,042 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:14:52,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:14:52,097 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:14:52,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:52 WrapperNode [2020-10-27 14:14:52,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:14:52,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:14:52,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:14:52,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:14:52,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:52" (1/1) ... [2020-10-27 14:14:52,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:52" (1/1) ... [2020-10-27 14:14:52,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:52" (1/1) ... [2020-10-27 14:14:52,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:52" (1/1) ... [2020-10-27 14:14:52,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:52" (1/1) ... [2020-10-27 14:14:52,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:52" (1/1) ... [2020-10-27 14:14:52,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:52" (1/1) ... [2020-10-27 14:14:52,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:14:52,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:14:52,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:14:52,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:14:52,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:14:52,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:14:52,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:14:52,291 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:14:52,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:14:52,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:14:52,291 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:14:52,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:14:52,292 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:14:52,292 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:14:52,292 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:14:52,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:14:52,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:14:52,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:14:52,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:14:52,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:14:52,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:14:52,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:14:52,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:14:52,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:14:52,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:14:52,782 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:14:52,782 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:14:52,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:14:52 BoogieIcfgContainer [2020-10-27 14:14:52,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:14:52,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:14:52,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:14:52,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:14:52,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:14:51" (1/3) ... [2020-10-27 14:14:52,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591454b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:14:52, skipping insertion in model container [2020-10-27 14:14:52,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:14:52" (2/3) ... [2020-10-27 14:14:52,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591454b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:14:52, skipping insertion in model container [2020-10-27 14:14:52,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:14:52" (3/3) ... [2020-10-27 14:14:52,797 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_27_ground.i [2020-10-27 14:14:52,811 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:14:52,817 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:14:52,833 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:14:52,879 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:14:52,879 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:14:52,880 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:14:52,880 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:14:52,880 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:14:52,880 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:14:52,880 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:14:52,880 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:14:52,903 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-27 14:14:52,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:14:52,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:52,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:52,917 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:52,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:52,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1523083384, now seen corresponding path program 1 times [2020-10-27 14:14:52,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:52,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677920441] [2020-10-27 14:14:52,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:53,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:53,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:53,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:53,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:53,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:14:53,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:14:53,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-27 14:14:53,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:53,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:53,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:14:53,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:53,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:14:53,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:53,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:53,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:53,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:53,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:53,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:14:53,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:53,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:53,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:53,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:53,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:14:53,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677920441] [2020-10-27 14:14:53,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:14:53,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:14:53,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360007582] [2020-10-27 14:14:53,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:14:53,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:53,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:14:53,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:14:53,871 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-27 14:14:53,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:53,963 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2020-10-27 14:14:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:14:53,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-27 14:14:53,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:53,973 INFO L225 Difference]: With dead ends: 55 [2020-10-27 14:14:53,973 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 14:14:53,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:14:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 14:14:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 14:14:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 14:14:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-27 14:14:54,019 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-27 14:14:54,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:54,019 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-27 14:14:54,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:14:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-27 14:14:54,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:14:54,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:54,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:54,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:14:54,021 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:54,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:54,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2122019559, now seen corresponding path program 1 times [2020-10-27 14:14:54,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:54,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931073412] [2020-10-27 14:14:54,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:54,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:54,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:54,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:54,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:54,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:14:54,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:14:54,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-27 14:14:54,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:54,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:14:54,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:14:54,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:14:54,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:14:54,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:54,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:54,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:54,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:54,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:54,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:14:54,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:54,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:54,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:54,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:54,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:14:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:14:54,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931073412] [2020-10-27 14:14:54,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:14:54,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 14:14:54,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386872021] [2020-10-27 14:14:54,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:14:54,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:54,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:14:54,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:14:54,537 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 8 states. [2020-10-27 14:14:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:54,779 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-10-27 14:14:54,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:14:54,780 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-27 14:14:54,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:54,783 INFO L225 Difference]: With dead ends: 45 [2020-10-27 14:14:54,783 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 14:14:54,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:14:54,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 14:14:54,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2020-10-27 14:14:54,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 14:14:54,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-27 14:14:54,800 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 17 [2020-10-27 14:14:54,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:54,801 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-27 14:14:54,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:14:54,801 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-27 14:14:54,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 14:14:54,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:54,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:54,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:14:54,803 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:54,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:54,804 INFO L82 PathProgramCache]: Analyzing trace with hash -2014478104, now seen corresponding path program 1 times [2020-10-27 14:14:54,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:54,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271104772] [2020-10-27 14:14:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:54,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:54,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:54,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:55,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:55,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 14:14:55,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:14:55,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-27 14:14:55,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:55,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:14:55,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:14:55,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:14:55,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:55,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:55,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:55,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:55,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:55,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:55,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:14:55,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:55,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:55,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:55,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:55,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:14:55,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271104772] [2020-10-27 14:14:55,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:55,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:14:55,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402802943] [2020-10-27 14:14:55,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:14:55,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:55,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:14:55,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:14:55,428 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 10 states. [2020-10-27 14:14:55,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:55,699 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2020-10-27 14:14:55,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:14:55,700 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-27 14:14:55,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:55,703 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:14:55,703 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 14:14:55,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:14:55,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 14:14:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2020-10-27 14:14:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 14:14:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-27 14:14:55,715 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 20 [2020-10-27 14:14:55,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:55,715 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-27 14:14:55,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:14:55,716 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-27 14:14:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:14:55,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:55,717 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:55,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:14:55,717 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:55,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1214699705, now seen corresponding path program 2 times [2020-10-27 14:14:55,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:55,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285992438] [2020-10-27 14:14:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:55,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:55,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:55,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:56,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:56,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:14:56,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:14:56,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 910 [2020-10-27 14:14:56,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:56,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:14:56,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:14:56,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:14:56,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:56,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:56,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:56,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:56,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:56,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:56,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:14:56,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:56,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:56,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:56,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:56,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:56,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:14:56,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285992438] [2020-10-27 14:14:56,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:56,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:14:56,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426545847] [2020-10-27 14:14:56,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:14:56,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:56,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:14:56,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:14:56,805 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 12 states. [2020-10-27 14:14:57,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:57,161 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-27 14:14:57,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:14:57,161 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-27 14:14:57,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:57,165 INFO L225 Difference]: With dead ends: 61 [2020-10-27 14:14:57,165 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 14:14:57,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:14:57,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 14:14:57,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 31. [2020-10-27 14:14:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 14:14:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-27 14:14:57,181 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-10-27 14:14:57,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:57,182 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-27 14:14:57,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:14:57,182 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-27 14:14:57,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 14:14:57,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:57,184 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:57,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:14:57,185 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:57,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:57,185 INFO L82 PathProgramCache]: Analyzing trace with hash -801241919, now seen corresponding path program 1 times [2020-10-27 14:14:57,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:57,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685813989] [2020-10-27 14:14:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:57,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:57,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:57,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:57,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:14:57,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:57,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-27 14:14:57,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:57,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:14:57,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:14:57,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:14:57,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:57,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:57,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:57,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:57,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:57,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:57,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:14:57,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:57,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:57,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:57,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:57,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:57,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 14:14:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:57,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:57,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:57,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:14:57,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:57,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:14:57,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:57,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:57,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:14:57,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:57,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:14:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:14:57,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685813989] [2020-10-27 14:14:57,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:14:57,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:14:57,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74139342] [2020-10-27 14:14:57,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:14:57,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:57,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:14:57,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:14:57,367 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 4 states. [2020-10-27 14:14:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:57,467 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2020-10-27 14:14:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:14:57,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 14:14:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:57,469 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:14:57,469 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 14:14:57,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:14:57,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 14:14:57,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-27 14:14:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 14:14:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-27 14:14:57,482 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 25 [2020-10-27 14:14:57,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:57,483 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-27 14:14:57,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:14:57,483 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-27 14:14:57,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 14:14:57,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:57,484 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:57,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:14:57,484 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:57,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:57,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1953370140, now seen corresponding path program 1 times [2020-10-27 14:14:57,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:57,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221242806] [2020-10-27 14:14:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:57,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:57,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:57,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:58,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:58,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 14:14:58,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:14:58,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-10-27 14:14:58,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:58,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:14:58,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:14:58,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:14:58,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:58,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:58,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:58,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:58,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:58,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:58,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:14:58,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:58,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:58,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:58,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:58,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:14:58,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-27 14:14:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:58,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:58,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:58,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:14:58,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:58,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:14:58,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:58,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:14:58,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:58,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:14:58,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:14:58,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221242806] [2020-10-27 14:14:58,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:58,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:14:58,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860611880] [2020-10-27 14:14:58,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:14:58,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:58,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:14:58,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:14:58,706 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2020-10-27 14:14:59,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:59,091 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-27 14:14:59,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:14:59,092 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-27 14:14:59,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:59,093 INFO L225 Difference]: With dead ends: 60 [2020-10-27 14:14:59,093 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:14:59,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:14:59,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:14:59,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2020-10-27 14:14:59,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:14:59,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-27 14:14:59,104 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 30 [2020-10-27 14:14:59,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:59,104 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-27 14:14:59,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:14:59,105 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-27 14:14:59,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 14:14:59,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:59,107 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:59,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:14:59,108 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:59,108 INFO L82 PathProgramCache]: Analyzing trace with hash 652653414, now seen corresponding path program 1 times [2020-10-27 14:14:59,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:59,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218448123] [2020-10-27 14:14:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:59,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:59,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:59,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:59,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:59,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 14:14:59,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:14:59,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 829 [2020-10-27 14:14:59,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:59,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:14:59,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:14:59,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:14:59,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:59,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:59,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:59,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:59,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:59,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:59,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:14:59,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:59,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:59,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:59,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:59,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:59,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-27 14:15:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:00,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:00,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:00,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:00,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:00,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:15:00,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:00,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:00,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:15:00,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:00,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 14:15:00,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218448123] [2020-10-27 14:15:00,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:00,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:15:00,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697964098] [2020-10-27 14:15:00,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:15:00,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:00,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:15:00,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:15:00,012 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 5 states. [2020-10-27 14:15:00,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:00,116 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2020-10-27 14:15:00,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:15:00,116 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-27 14:15:00,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:00,118 INFO L225 Difference]: With dead ends: 98 [2020-10-27 14:15:00,118 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 14:15:00,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:15:00,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 14:15:00,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-10-27 14:15:00,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 14:15:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-10-27 14:15:00,136 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 30 [2020-10-27 14:15:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:00,138 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-10-27 14:15:00,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:15:00,138 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-10-27 14:15:00,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:15:00,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:00,141 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:00,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:15:00,145 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:00,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1629796061, now seen corresponding path program 2 times [2020-10-27 14:15:00,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:00,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59035590] [2020-10-27 14:15:00,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:00,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:00,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:00,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:02,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:15:02,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:02,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2619 [2020-10-27 14:15:02,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:02,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:15:02,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:15:02,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:15:02,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:02,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:02,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:02,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:02,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:02,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:02,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:02,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:02,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 14:15:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:02,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:02,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:02,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:02,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:02,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:02,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:02,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:15:02,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:02,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:15:02,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59035590] [2020-10-27 14:15:02,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:02,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:15:02,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925271639] [2020-10-27 14:15:02,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:15:02,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:02,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:15:02,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:15:02,848 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 6 states. [2020-10-27 14:15:02,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:02,944 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2020-10-27 14:15:02,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:15:02,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-27 14:15:02,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:02,945 INFO L225 Difference]: With dead ends: 110 [2020-10-27 14:15:02,946 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 14:15:02,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:15:02,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 14:15:02,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2020-10-27 14:15:02,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 14:15:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-10-27 14:15:02,956 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 35 [2020-10-27 14:15:02,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:02,956 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-27 14:15:02,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:15:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-10-27 14:15:02,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:15:02,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:02,959 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:02,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:15:02,960 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:02,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:02,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1286539832, now seen corresponding path program 3 times [2020-10-27 14:15:02,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:02,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680355164] [2020-10-27 14:15:02,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:02,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:03,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:03,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:07,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:07,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:15:07,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:07,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:15:07,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:07,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:15:07,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:15:07,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:15:07,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:08,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:08,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:08,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:08,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:08,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:08,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:15:08,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:08,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:08,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:08,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:08,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:08,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 14:15:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:08,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:08,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:08,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:08,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:08,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:15:08,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:08,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:08,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:08,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:15:08,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:15:08,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680355164] [2020-10-27 14:15:08,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:08,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:15:08,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083943881] [2020-10-27 14:15:08,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:15:08,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:08,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:15:08,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:15:08,268 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 14 states. [2020-10-27 14:15:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:08,764 INFO L93 Difference]: Finished difference Result 102 states and 120 transitions. [2020-10-27 14:15:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:15:08,766 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-27 14:15:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:08,769 INFO L225 Difference]: With dead ends: 102 [2020-10-27 14:15:08,769 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 14:15:08,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:15:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 14:15:08,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2020-10-27 14:15:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 14:15:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2020-10-27 14:15:08,794 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 40 [2020-10-27 14:15:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:08,795 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2020-10-27 14:15:08,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:15:08,795 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2020-10-27 14:15:08,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:15:08,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:08,796 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:08,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:15:08,800 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:08,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:08,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1319483722, now seen corresponding path program 1 times [2020-10-27 14:15:08,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:08,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448623536] [2020-10-27 14:15:08,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:08,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:08,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:08,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:13,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:13,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:15:13,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:13,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4192 [2020-10-27 14:15:13,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:15:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:15:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:15:13,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:15:13,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:13,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:13,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:13,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:13,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:13,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:13,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:13,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:13,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:13,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:13,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:15:13,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 14:15:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:13,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:13,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:13,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:13,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:13,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:13,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:13,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:13,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:15:13,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:13,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 14:15:13,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448623536] [2020-10-27 14:15:13,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:13,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:15:13,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638167505] [2020-10-27 14:15:13,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:15:13,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:13,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:15:13,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:15:13,100 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand 7 states. [2020-10-27 14:15:13,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:13,218 INFO L93 Difference]: Finished difference Result 149 states and 186 transitions. [2020-10-27 14:15:13,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:15:13,219 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-10-27 14:15:13,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:13,220 INFO L225 Difference]: With dead ends: 149 [2020-10-27 14:15:13,220 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 14:15:13,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:15:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 14:15:13,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2020-10-27 14:15:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 14:15:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-10-27 14:15:13,239 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 40 [2020-10-27 14:15:13,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:13,240 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-10-27 14:15:13,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:15:13,240 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-10-27 14:15:13,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:15:13,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:13,242 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:13,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:15:13,242 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:13,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:13,243 INFO L82 PathProgramCache]: Analyzing trace with hash 628072889, now seen corresponding path program 2 times [2020-10-27 14:15:13,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:13,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104944561] [2020-10-27 14:15:13,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:13,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:13,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:13,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:18,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:18,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:15:18,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:18,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:15:18,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:18,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:15:18,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:15:18,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:15:18,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:18,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:18,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:18,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:18,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:18,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:18,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:18,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:18,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:18,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:18,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:18,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:18,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 14:15:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:18,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:18,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:18,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:18,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:18,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:15:18,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:18,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:18,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:15:18,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:18,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 14:15:18,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104944561] [2020-10-27 14:15:18,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:18,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:15:18,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855611037] [2020-10-27 14:15:18,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:15:18,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:18,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:15:18,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:15:18,365 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 8 states. [2020-10-27 14:15:18,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:18,490 INFO L93 Difference]: Finished difference Result 174 states and 218 transitions. [2020-10-27 14:15:18,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:15:18,490 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-10-27 14:15:18,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:18,492 INFO L225 Difference]: With dead ends: 174 [2020-10-27 14:15:18,492 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 14:15:18,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:15:18,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 14:15:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2020-10-27 14:15:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 14:15:18,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2020-10-27 14:15:18,503 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 45 [2020-10-27 14:15:18,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:18,503 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2020-10-27 14:15:18,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:15:18,504 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2020-10-27 14:15:18,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 14:15:18,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:18,504 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:18,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:15:18,505 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:18,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1908272750, now seen corresponding path program 3 times [2020-10-27 14:15:18,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:18,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232265058] [2020-10-27 14:15:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:18,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:18,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:19,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:23,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:23,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:15:23,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:23,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:15:23,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:23,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:15:23,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:15:23,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:15:23,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:23,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:23,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:23,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:23,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:23,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:23,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:23,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:23,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:23,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:23,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:23,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:23,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 14:15:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:23,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:23,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:23,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:23,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:23,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:23,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:23,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:23,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:23,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:15:23,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-27 14:15:23,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232265058] [2020-10-27 14:15:23,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:23,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:15:23,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826408117] [2020-10-27 14:15:23,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:15:23,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:23,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:15:23,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:15:23,734 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand 12 states. [2020-10-27 14:15:24,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:24,268 INFO L93 Difference]: Finished difference Result 129 states and 154 transitions. [2020-10-27 14:15:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:15:24,269 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-27 14:15:24,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:24,270 INFO L225 Difference]: With dead ends: 129 [2020-10-27 14:15:24,270 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 14:15:24,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:15:24,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 14:15:24,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 78. [2020-10-27 14:15:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:15:24,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2020-10-27 14:15:24,281 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 50 [2020-10-27 14:15:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:24,281 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2020-10-27 14:15:24,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:15:24,281 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2020-10-27 14:15:24,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 14:15:24,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:24,282 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:24,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:15:24,283 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:24,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:24,283 INFO L82 PathProgramCache]: Analyzing trace with hash -355554258, now seen corresponding path program 4 times [2020-10-27 14:15:24,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:24,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269403117] [2020-10-27 14:15:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:24,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:24,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:24,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:24,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:29,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:29,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:15:29,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:15:29,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:15:29,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:29,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:15:29,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:15:29,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:15:29,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:29,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:29,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:29,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:29,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:29,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:29,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:29,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:29,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:29,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:29,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:29,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:29,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 14:15:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:29,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:29,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:29,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:29,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:29,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:15:29,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:29,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:15:29,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:29,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:15:29,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-27 14:15:29,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269403117] [2020-10-27 14:15:29,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:29,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:15:29,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143953040] [2020-10-27 14:15:29,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:15:29,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:29,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:15:29,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:15:29,618 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 15 states. [2020-10-27 14:15:30,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:30,431 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2020-10-27 14:15:30,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:15:30,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-27 14:15:30,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:30,433 INFO L225 Difference]: With dead ends: 96 [2020-10-27 14:15:30,434 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 14:15:30,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:15:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 14:15:30,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 61. [2020-10-27 14:15:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 14:15:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-10-27 14:15:30,444 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 50 [2020-10-27 14:15:30,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:30,444 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-10-27 14:15:30,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:15:30,444 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-10-27 14:15:30,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 14:15:30,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:30,445 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:30,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:15:30,445 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:30,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:30,446 INFO L82 PathProgramCache]: Analyzing trace with hash 54597766, now seen corresponding path program 4 times [2020-10-27 14:15:30,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:30,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254147246] [2020-10-27 14:15:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:30,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:30,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:31,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:35,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:35,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 14:15:35,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:35,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:15:35,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:35,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:15:35,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:15:35,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:15:35,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:35,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:35,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:35,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:35,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:35,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:35,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:35,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:35,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:35,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:35,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:35,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:35,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 14:15:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:35,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:35,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:35,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:35,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:35,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:35,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:35,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:35,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:35,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:15:35,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:35,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 14:15:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:35,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:35,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:35,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:35,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:35,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:35,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:35,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:35,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:35,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:15:35,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-27 14:15:35,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254147246] [2020-10-27 14:15:35,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:35,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:15:35,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512169385] [2020-10-27 14:15:35,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:15:35,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:35,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:15:35,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:15:35,848 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 18 states. [2020-10-27 14:15:36,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:36,666 INFO L93 Difference]: Finished difference Result 146 states and 176 transitions. [2020-10-27 14:15:36,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:15:36,667 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-10-27 14:15:36,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:36,669 INFO L225 Difference]: With dead ends: 146 [2020-10-27 14:15:36,670 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 14:15:36,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:15:36,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 14:15:36,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 103. [2020-10-27 14:15:36,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 14:15:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 123 transitions. [2020-10-27 14:15:36,690 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 123 transitions. Word has length 58 [2020-10-27 14:15:36,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:36,690 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 123 transitions. [2020-10-27 14:15:36,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:15:36,690 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 123 transitions. [2020-10-27 14:15:36,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 14:15:36,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:36,691 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:36,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:15:36,692 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:36,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:36,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1977825800, now seen corresponding path program 5 times [2020-10-27 14:15:36,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:36,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507128874] [2020-10-27 14:15:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:36,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:36,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:37,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:41,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:41,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 14:15:41,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:41,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:15:41,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:41,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:15:41,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:15:41,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:15:41,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:41,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:41,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:41,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:41,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:41,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:41,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:41,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:41,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:41,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:41,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:41,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:41,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 14:15:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:41,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:41,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:41,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:41,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:41,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:41,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:41,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:41,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:15:41,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:41,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:41,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 14:15:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:41,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:41,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:41,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:41,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:41,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:15:41,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:41,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:41,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:15:41,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:41,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-27 14:15:41,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507128874] [2020-10-27 14:15:41,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:41,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:15:41,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492164623] [2020-10-27 14:15:41,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:15:41,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:41,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:15:41,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:15:41,821 INFO L87 Difference]: Start difference. First operand 103 states and 123 transitions. Second operand 9 states. [2020-10-27 14:15:41,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:41,990 INFO L93 Difference]: Finished difference Result 216 states and 270 transitions. [2020-10-27 14:15:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:15:41,990 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-27 14:15:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:41,993 INFO L225 Difference]: With dead ends: 216 [2020-10-27 14:15:41,993 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 14:15:41,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:15:41,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 14:15:42,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 119. [2020-10-27 14:15:42,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 14:15:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 143 transitions. [2020-10-27 14:15:42,010 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 143 transitions. Word has length 58 [2020-10-27 14:15:42,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:42,010 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 143 transitions. [2020-10-27 14:15:42,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:15:42,010 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 143 transitions. [2020-10-27 14:15:42,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:15:42,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:42,011 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:42,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:15:42,012 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:42,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:42,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1876809647, now seen corresponding path program 6 times [2020-10-27 14:15:42,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:42,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16420383] [2020-10-27 14:15:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:42,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:42,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:42,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:47,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:47,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:15:47,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:47,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:15:47,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:47,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:15:47,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:15:47,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:15:47,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:47,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:47,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:47,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:47,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:47,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:47,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:47,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:47,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:47,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:47,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:47,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:47,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 14:15:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:47,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:47,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:47,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:47,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:47,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:47,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:47,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:47,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:47,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:15:47,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:47,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-27 14:15:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:47,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:47,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:47,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:47,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:47,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:15:47,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:47,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:47,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:47,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:15:47,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-27 14:15:47,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16420383] [2020-10-27 14:15:47,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:47,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:15:47,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178869921] [2020-10-27 14:15:47,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:15:47,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:47,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:15:47,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:15:47,409 INFO L87 Difference]: Start difference. First operand 119 states and 143 transitions. Second operand 16 states. [2020-10-27 14:15:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:48,188 INFO L93 Difference]: Finished difference Result 166 states and 199 transitions. [2020-10-27 14:15:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:15:48,188 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-27 14:15:48,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:48,191 INFO L225 Difference]: With dead ends: 166 [2020-10-27 14:15:48,192 INFO L226 Difference]: Without dead ends: 162 [2020-10-27 14:15:48,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:15:48,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-27 14:15:48,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2020-10-27 14:15:48,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 14:15:48,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2020-10-27 14:15:48,210 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 63 [2020-10-27 14:15:48,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:48,210 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2020-10-27 14:15:48,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:15:48,210 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2020-10-27 14:15:48,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:15:48,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:48,211 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:48,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:15:48,212 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:48,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:48,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1804423089, now seen corresponding path program 7 times [2020-10-27 14:15:48,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:48,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899113594] [2020-10-27 14:15:48,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:48,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:48,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:48,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:53,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:53,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:15:53,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:53,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:15:53,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:53,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:15:53,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:15:53,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:15:53,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:53,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:53,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:53,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:53,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:53,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:53,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:15:53,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:53,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:53,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:53,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:53,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:53,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 14:15:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:53,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:53,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:53,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:53,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:53,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:15:53,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:53,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:53,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:15:53,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:53,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:53,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-27 14:15:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:53,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:53,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:53,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:53,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:53,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:15:53,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:53,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:53,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:15:53,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:53,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-27 14:15:53,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899113594] [2020-10-27 14:15:53,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:53,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:15:53,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529761314] [2020-10-27 14:15:53,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:15:53,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:53,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:15:53,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:15:53,348 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand 10 states. [2020-10-27 14:15:53,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:53,519 INFO L93 Difference]: Finished difference Result 232 states and 288 transitions. [2020-10-27 14:15:53,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:15:53,520 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-10-27 14:15:53,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:53,521 INFO L225 Difference]: With dead ends: 232 [2020-10-27 14:15:53,521 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 14:15:53,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:15:53,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 14:15:53,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 128. [2020-10-27 14:15:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 14:15:53,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 154 transitions. [2020-10-27 14:15:53,536 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 154 transitions. Word has length 63 [2020-10-27 14:15:53,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:53,537 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 154 transitions. [2020-10-27 14:15:53,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:15:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 154 transitions. [2020-10-27 14:15:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 14:15:53,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:53,538 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:53,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:15:53,538 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:53,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:53,538 INFO L82 PathProgramCache]: Analyzing trace with hash -920396822, now seen corresponding path program 8 times [2020-10-27 14:15:53,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:53,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105823680] [2020-10-27 14:15:53,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:53,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:53,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:54,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:58,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:58,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:15:58,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:15:58,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:15:58,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:58,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:15:58,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:15:58,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:15:58,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:58,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:15:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:58,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:58,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:58,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:15:58,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:58,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:58,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:58,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:15:58,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:58,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:15:58,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:58,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:15:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:58,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:58,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:58,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:58,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:58,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:58,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:58,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:58,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:58,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:15:58,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:58,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:15:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:58,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:58,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:15:58,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:15:58,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:15:58,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:15:58,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:15:58,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:15:58,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:15:58,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:15:58,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:15:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-27 14:15:58,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105823680] [2020-10-27 14:15:58,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:15:58,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:15:58,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665223727] [2020-10-27 14:15:58,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:15:58,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:15:58,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:15:58,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:15:58,803 INFO L87 Difference]: Start difference. First operand 128 states and 154 transitions. Second operand 14 states. [2020-10-27 14:15:59,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:59,479 INFO L93 Difference]: Finished difference Result 164 states and 196 transitions. [2020-10-27 14:15:59,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:15:59,480 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-10-27 14:15:59,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:59,482 INFO L225 Difference]: With dead ends: 164 [2020-10-27 14:15:59,482 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 14:15:59,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:15:59,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 14:15:59,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 117. [2020-10-27 14:15:59,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 14:15:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2020-10-27 14:15:59,513 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 68 [2020-10-27 14:15:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:59,514 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2020-10-27 14:15:59,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:15:59,514 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2020-10-27 14:15:59,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 14:15:59,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:59,516 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:15:59,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:15:59,516 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:59,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:59,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1529203308, now seen corresponding path program 9 times [2020-10-27 14:15:59,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:59,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038783503] [2020-10-27 14:15:59,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:59,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:59,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:00,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:04,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:04,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:16:04,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:16:04,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:16:04,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:04,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:16:04,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:16:04,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:16:04,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:04,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:04,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:04,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:04,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:04,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:04,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:04,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:04,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:04,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:04,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:04,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:04,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:16:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:04,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:04,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:04,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:04,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:04,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:16:04,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:04,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:04,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:04,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:04,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:04,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:16:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:04,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:04,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:04,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:04,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:04,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:16:04,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:04,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:04,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:04,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:04,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-27 14:16:04,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038783503] [2020-10-27 14:16:04,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:04,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:16:04,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086023079] [2020-10-27 14:16:04,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:16:04,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:04,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:16:04,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:16:04,749 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand 12 states. [2020-10-27 14:16:05,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:05,233 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2020-10-27 14:16:05,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:16:05,233 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-27 14:16:05,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:05,236 INFO L225 Difference]: With dead ends: 142 [2020-10-27 14:16:05,237 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 14:16:05,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:16:05,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 14:16:05,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 103. [2020-10-27 14:16:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 14:16:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2020-10-27 14:16:05,256 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 68 [2020-10-27 14:16:05,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:05,256 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2020-10-27 14:16:05,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:16:05,256 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2020-10-27 14:16:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 14:16:05,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:05,257 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:05,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:16:05,257 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:05,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:05,258 INFO L82 PathProgramCache]: Analyzing trace with hash 2143610024, now seen corresponding path program 10 times [2020-10-27 14:16:05,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:05,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302319441] [2020-10-27 14:16:05,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:05,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:05,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:06,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:06,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:10,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:10,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:16:10,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:10,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:16:10,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:10,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:16:10,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:16:10,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:16:10,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:10,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:10,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:10,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:10,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:10,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:10,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:10,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:10,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:10,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:10,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:10,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:10,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:16:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:10,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:10,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:10,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:10,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:10,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:10,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:10,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:10,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:10,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:10,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:10,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:16:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:10,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:10,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:10,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:10,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:10,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:10,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:10,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:10,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:10,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:10,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 44 proven. 38 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-10-27 14:16:10,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302319441] [2020-10-27 14:16:10,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:10,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:16:10,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315941985] [2020-10-27 14:16:10,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:16:10,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:10,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:16:10,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:16:10,803 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand 23 states. [2020-10-27 14:16:11,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:11,747 INFO L93 Difference]: Finished difference Result 313 states and 391 transitions. [2020-10-27 14:16:11,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:16:11,748 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 68 [2020-10-27 14:16:11,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:11,752 INFO L225 Difference]: With dead ends: 313 [2020-10-27 14:16:11,752 INFO L226 Difference]: Without dead ends: 309 [2020-10-27 14:16:11,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:16:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-27 14:16:11,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 141. [2020-10-27 14:16:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 14:16:11,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 172 transitions. [2020-10-27 14:16:11,775 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 172 transitions. Word has length 68 [2020-10-27 14:16:11,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:11,775 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 172 transitions. [2020-10-27 14:16:11,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:16:11,776 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 172 transitions. [2020-10-27 14:16:11,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 14:16:11,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:11,777 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:11,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:16:11,777 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:11,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:11,778 INFO L82 PathProgramCache]: Analyzing trace with hash -228129238, now seen corresponding path program 11 times [2020-10-27 14:16:11,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:11,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346879534] [2020-10-27 14:16:11,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:11,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:11,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:12,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:12,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:16,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:16,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:16:16,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:16,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:16:16,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:16,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:16:16,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:16:16,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:16:16,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:17,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:17,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:17,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:17,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:17,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:17,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:17,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:17,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:17,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:17,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:17,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:17,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:16:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:17,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:17,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:17,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:17,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:17,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:17,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:17,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:17,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:17,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:17,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:17,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:16:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:17,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:17,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:17,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:17,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:17,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:17,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:17,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:17,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:17,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:17,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 16 [2020-10-27 14:16:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 38 proven. 42 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-27 14:16:17,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346879534] [2020-10-27 14:16:17,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:17,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:16:17,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907968976] [2020-10-27 14:16:17,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:16:17,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:17,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:16:17,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:16:17,270 INFO L87 Difference]: Start difference. First operand 141 states and 172 transitions. Second operand 21 states. [2020-10-27 14:16:18,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:18,119 INFO L93 Difference]: Finished difference Result 285 states and 353 transitions. [2020-10-27 14:16:18,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:16:18,120 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2020-10-27 14:16:18,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:18,123 INFO L225 Difference]: With dead ends: 285 [2020-10-27 14:16:18,123 INFO L226 Difference]: Without dead ends: 281 [2020-10-27 14:16:18,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:16:18,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-27 14:16:18,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 136. [2020-10-27 14:16:18,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 14:16:18,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 165 transitions. [2020-10-27 14:16:18,144 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 165 transitions. Word has length 68 [2020-10-27 14:16:18,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:18,145 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 165 transitions. [2020-10-27 14:16:18,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:16:18,145 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 165 transitions. [2020-10-27 14:16:18,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 14:16:18,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:18,146 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:18,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:16:18,146 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:18,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:18,146 INFO L82 PathProgramCache]: Analyzing trace with hash -205496984, now seen corresponding path program 12 times [2020-10-27 14:16:18,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:18,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104543446] [2020-10-27 14:16:18,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:18,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:18,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:18,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:19,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:23,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:23,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:16:23,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:23,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:16:23,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:23,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:16:23,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:16:23,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:16:23,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:23,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:23,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:23,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:23,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:23,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:23,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:16:23,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:23,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:23,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:23,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:23,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:23,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:16:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:23,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:23,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:23,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:23,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:23,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:16:23,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:23,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:23,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:23,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:23,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:23,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:16:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:23,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:23,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:23,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:23,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:23,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:23,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:23,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:23,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:23,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:23,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-27 14:16:23,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104543446] [2020-10-27 14:16:23,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:23,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:16:23,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890980513] [2020-10-27 14:16:23,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:16:23,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:23,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:16:23,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:16:23,528 INFO L87 Difference]: Start difference. First operand 136 states and 165 transitions. Second operand 19 states. [2020-10-27 14:16:24,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:24,387 INFO L93 Difference]: Finished difference Result 253 states and 311 transitions. [2020-10-27 14:16:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:16:24,391 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 68 [2020-10-27 14:16:24,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:24,394 INFO L225 Difference]: With dead ends: 253 [2020-10-27 14:16:24,394 INFO L226 Difference]: Without dead ends: 249 [2020-10-27 14:16:24,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:16:24,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-27 14:16:24,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 128. [2020-10-27 14:16:24,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 14:16:24,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 154 transitions. [2020-10-27 14:16:24,412 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 154 transitions. Word has length 68 [2020-10-27 14:16:24,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:24,412 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 154 transitions. [2020-10-27 14:16:24,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:16:24,412 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 154 transitions. [2020-10-27 14:16:24,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 14:16:24,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:24,413 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:24,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:16:24,414 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:24,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:24,414 INFO L82 PathProgramCache]: Analyzing trace with hash -277883542, now seen corresponding path program 13 times [2020-10-27 14:16:24,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:24,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545448886] [2020-10-27 14:16:24,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:24,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:24,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:25,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:25,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:29,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:29,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:16:29,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:29,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:16:29,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:29,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:16:29,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:16:29,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:16:29,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:29,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:29,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:29,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:29,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:29,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:29,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:29,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:29,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:29,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:29,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:29,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:29,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:16:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:29,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:29,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:29,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:29,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:29,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:29,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:29,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:29,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:29,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:29,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:29,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:16:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:29,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:29,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:29,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:29,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:29,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:16:29,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:29,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:16:29,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:29,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:16:29,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-27 14:16:29,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545448886] [2020-10-27 14:16:29,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:29,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:16:29,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734377744] [2020-10-27 14:16:29,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:16:29,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:29,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:16:29,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:16:29,797 INFO L87 Difference]: Start difference. First operand 128 states and 154 transitions. Second operand 17 states. [2020-10-27 14:16:30,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:30,764 INFO L93 Difference]: Finished difference Result 217 states and 269 transitions. [2020-10-27 14:16:30,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:16:30,764 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-10-27 14:16:30,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:30,767 INFO L225 Difference]: With dead ends: 217 [2020-10-27 14:16:30,767 INFO L226 Difference]: Without dead ends: 213 [2020-10-27 14:16:30,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:16:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-27 14:16:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 186. [2020-10-27 14:16:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-27 14:16:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 231 transitions. [2020-10-27 14:16:30,788 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 231 transitions. Word has length 68 [2020-10-27 14:16:30,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:30,788 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 231 transitions. [2020-10-27 14:16:30,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:16:30,788 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 231 transitions. [2020-10-27 14:16:30,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 14:16:30,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:30,789 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:30,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:16:30,790 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:30,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:30,790 INFO L82 PathProgramCache]: Analyzing trace with hash 615602796, now seen corresponding path program 14 times [2020-10-27 14:16:30,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:30,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375894559] [2020-10-27 14:16:30,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:30,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:30,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:31,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:31,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:35,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:35,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:16:35,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:35,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:16:35,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:35,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:16:35,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:16:35,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:16:35,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:36,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:36,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:36,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:36,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:36,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:36,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:16:36,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:36,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:36,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:36,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:36,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:36,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:16:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:36,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:36,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:36,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:36,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:36,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:36,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:36,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:36,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:36,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:36,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:36,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:16:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:36,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:36,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:36,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:36,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:36,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:16:36,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:36,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:36,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:36,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:36,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 23 proven. 44 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-27 14:16:36,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375894559] [2020-10-27 14:16:36,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:36,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:16:36,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972507671] [2020-10-27 14:16:36,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:16:36,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:36,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:16:36,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:16:36,123 INFO L87 Difference]: Start difference. First operand 186 states and 231 transitions. Second operand 17 states. [2020-10-27 14:16:36,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:36,944 INFO L93 Difference]: Finished difference Result 297 states and 368 transitions. [2020-10-27 14:16:36,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:16:36,945 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-10-27 14:16:36,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:36,949 INFO L225 Difference]: With dead ends: 297 [2020-10-27 14:16:36,949 INFO L226 Difference]: Without dead ends: 293 [2020-10-27 14:16:36,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:16:36,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-27 14:16:36,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 164. [2020-10-27 14:16:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 14:16:36,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 201 transitions. [2020-10-27 14:16:36,971 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 201 transitions. Word has length 68 [2020-10-27 14:16:36,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:36,971 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 201 transitions. [2020-10-27 14:16:36,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:16:36,971 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 201 transitions. [2020-10-27 14:16:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 14:16:36,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:36,973 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:36,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:16:36,973 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:36,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:36,973 INFO L82 PathProgramCache]: Analyzing trace with hash 221236010, now seen corresponding path program 15 times [2020-10-27 14:16:36,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:36,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768374883] [2020-10-27 14:16:36,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:36,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:37,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:37,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:37,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:41,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:41,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:16:41,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:16:41,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:16:41,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:41,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:16:41,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:16:41,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:16:41,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:42,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:42,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:42,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:42,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:42,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:42,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:42,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:42,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:42,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:42,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:42,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:42,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:16:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:42,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:42,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:42,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:42,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:42,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:16:42,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:42,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:16:42,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:42,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:16:42,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:42,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:16:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:42,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:42,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:42,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:42,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:42,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:42,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:42,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:42,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:42,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:42,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-27 14:16:42,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768374883] [2020-10-27 14:16:42,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:42,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:16:42,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148416777] [2020-10-27 14:16:42,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:16:42,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:42,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:16:42,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:16:42,339 INFO L87 Difference]: Start difference. First operand 164 states and 201 transitions. Second operand 16 states. [2020-10-27 14:16:43,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:43,251 INFO L93 Difference]: Finished difference Result 204 states and 250 transitions. [2020-10-27 14:16:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:16:43,251 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-10-27 14:16:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:43,253 INFO L225 Difference]: With dead ends: 204 [2020-10-27 14:16:43,253 INFO L226 Difference]: Without dead ends: 200 [2020-10-27 14:16:43,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:16:43,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-27 14:16:43,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 123. [2020-10-27 14:16:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 14:16:43,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 146 transitions. [2020-10-27 14:16:43,271 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 146 transitions. Word has length 68 [2020-10-27 14:16:43,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:43,271 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 146 transitions. [2020-10-27 14:16:43,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:16:43,271 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 146 transitions. [2020-10-27 14:16:43,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 14:16:43,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:43,273 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:43,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:16:43,273 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:43,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:43,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1848977084, now seen corresponding path program 5 times [2020-10-27 14:16:43,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:43,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085841211] [2020-10-27 14:16:43,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:43,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:43,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:44,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:48,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:48,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 14:16:48,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:16:48,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:16:48,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:48,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:16:48,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:16:48,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:16:48,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:48,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:48,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:48,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:48,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:48,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:48,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:48,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:48,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:48,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:48,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:48,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:48,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:16:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:48,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:48,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:48,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:48,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:48,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:48,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:48,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:48,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:48,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:48,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:48,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:16:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:48,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:48,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:48,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:48,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:48,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:48,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:48,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:48,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:48,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:48,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:48,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 14:16:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:48,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:48,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:48,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:48,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:48,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:48,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:48,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:48,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:48,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:48,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 73 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-10-27 14:16:48,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085841211] [2020-10-27 14:16:48,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:48,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:16:48,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873786054] [2020-10-27 14:16:48,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:16:48,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:48,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:16:48,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:16:48,749 INFO L87 Difference]: Start difference. First operand 123 states and 146 transitions. Second operand 22 states. [2020-10-27 14:16:49,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:49,828 INFO L93 Difference]: Finished difference Result 275 states and 341 transitions. [2020-10-27 14:16:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:16:49,829 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 76 [2020-10-27 14:16:49,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:49,831 INFO L225 Difference]: With dead ends: 275 [2020-10-27 14:16:49,832 INFO L226 Difference]: Without dead ends: 271 [2020-10-27 14:16:49,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:16:49,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-27 14:16:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 194. [2020-10-27 14:16:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-27 14:16:49,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 240 transitions. [2020-10-27 14:16:49,866 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 240 transitions. Word has length 76 [2020-10-27 14:16:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:49,866 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 240 transitions. [2020-10-27 14:16:49,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:16:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 240 transitions. [2020-10-27 14:16:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 14:16:49,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:49,868 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:49,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:16:49,868 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:49,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:49,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1601984710, now seen corresponding path program 16 times [2020-10-27 14:16:49,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:49,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42352457] [2020-10-27 14:16:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:49,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:49,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:50,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:54,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:54,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 14:16:54,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:16:54,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:16:54,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:54,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:16:54,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:16:54,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:16:54,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:55,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:16:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:55,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:55,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:55,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:16:55,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:55,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:16:55,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:55,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:16:55,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:55,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:16:55,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:55,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:16:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:55,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:55,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:55,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:55,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:55,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:16:55,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:55,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:55,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:55,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:55,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:55,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:16:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:55,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:55,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:55,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:55,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:55,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:55,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:55,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:55,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:55,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:55,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:55,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 14:16:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:55,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:55,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:16:55,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:16:55,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:16:55,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:16:55,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:16:55,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:16:55,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:16:55,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:16:55,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:16:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 17 proven. 75 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-27 14:16:55,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42352457] [2020-10-27 14:16:55,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:16:55,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:16:55,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187230932] [2020-10-27 14:16:55,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:16:55,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:16:55,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:16:55,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:16:55,306 INFO L87 Difference]: Start difference. First operand 194 states and 240 transitions. Second operand 20 states. [2020-10-27 14:16:56,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:16:56,376 INFO L93 Difference]: Finished difference Result 279 states and 344 transitions. [2020-10-27 14:16:56,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:16:56,376 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 76 [2020-10-27 14:16:56,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:16:56,379 INFO L225 Difference]: With dead ends: 279 [2020-10-27 14:16:56,379 INFO L226 Difference]: Without dead ends: 275 [2020-10-27 14:16:56,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:16:56,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-27 14:16:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 191. [2020-10-27 14:16:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-27 14:16:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 235 transitions. [2020-10-27 14:16:56,409 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 235 transitions. Word has length 76 [2020-10-27 14:16:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:16:56,409 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 235 transitions. [2020-10-27 14:16:56,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:16:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 235 transitions. [2020-10-27 14:16:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 14:16:56,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:16:56,411 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:16:56,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:16:56,411 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:16:56,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:16:56,412 INFO L82 PathProgramCache]: Analyzing trace with hash 572625412, now seen corresponding path program 17 times [2020-10-27 14:16:56,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:16:56,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270474973] [2020-10-27 14:16:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:16:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:16:56,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:56,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:16:57,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:01,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:01,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 14:17:01,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:17:01,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:17:01,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:01,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:17:01,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:17:01,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:17:01,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:01,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:01,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:01,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:01,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:01,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:01,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:01,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:01,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:01,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:01,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:01,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:01,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:17:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:01,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:01,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:01,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:01,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:01,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:01,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:01,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:01,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:01,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:01,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:01,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:17:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:01,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:01,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:01,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:01,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:01,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:01,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:01,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:01,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:01,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:01,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:01,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 14:17:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:01,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:01,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:01,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:01,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:01,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:01,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:01,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:01,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:01,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:01,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 12 proven. 75 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-27 14:17:01,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270474973] [2020-10-27 14:17:01,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:01,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:17:01,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852815129] [2020-10-27 14:17:01,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:17:01,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:01,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:17:01,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:17:01,781 INFO L87 Difference]: Start difference. First operand 191 states and 235 transitions. Second operand 18 states. [2020-10-27 14:17:02,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:02,717 INFO L93 Difference]: Finished difference Result 261 states and 320 transitions. [2020-10-27 14:17:02,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:17:02,721 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-10-27 14:17:02,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:02,723 INFO L225 Difference]: With dead ends: 261 [2020-10-27 14:17:02,723 INFO L226 Difference]: Without dead ends: 257 [2020-10-27 14:17:02,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:17:02,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-27 14:17:02,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 186. [2020-10-27 14:17:02,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-27 14:17:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 228 transitions. [2020-10-27 14:17:02,755 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 228 transitions. Word has length 76 [2020-10-27 14:17:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:02,755 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 228 transitions. [2020-10-27 14:17:02,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:17:02,755 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 228 transitions. [2020-10-27 14:17:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 14:17:02,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:02,756 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:02,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:17:02,757 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:02,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:02,757 INFO L82 PathProgramCache]: Analyzing trace with hash 996272134, now seen corresponding path program 18 times [2020-10-27 14:17:02,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:02,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541962807] [2020-10-27 14:17:02,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:02,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:02,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:03,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:07,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:07,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 14:17:07,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:17:07,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:17:07,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:07,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:17:07,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:17:07,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:17:07,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:08,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:08,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:08,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:08,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:08,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:08,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:08,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:08,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:08,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:08,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:08,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:08,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:17:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:08,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:08,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:08,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:08,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:08,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:08,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:08,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:08,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:08,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:08,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:08,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:17:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:08,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:08,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:08,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:08,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:08,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:08,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:08,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:08,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:08,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:08,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:08,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 14:17:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:08,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:08,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:08,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:08,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:08,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:08,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:08,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:08,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:08,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:08,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 6 proven. 73 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-27 14:17:08,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541962807] [2020-10-27 14:17:08,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:08,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:17:08,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371167015] [2020-10-27 14:17:08,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:17:08,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:08,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:17:08,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:17:08,054 INFO L87 Difference]: Start difference. First operand 186 states and 228 transitions. Second operand 16 states. [2020-10-27 14:17:08,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:08,889 INFO L93 Difference]: Finished difference Result 241 states and 294 transitions. [2020-10-27 14:17:08,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:17:08,890 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 76 [2020-10-27 14:17:08,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:08,892 INFO L225 Difference]: With dead ends: 241 [2020-10-27 14:17:08,892 INFO L226 Difference]: Without dead ends: 237 [2020-10-27 14:17:08,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:17:08,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-27 14:17:08,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 178. [2020-10-27 14:17:08,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-27 14:17:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 217 transitions. [2020-10-27 14:17:08,921 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 217 transitions. Word has length 76 [2020-10-27 14:17:08,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:08,921 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 217 transitions. [2020-10-27 14:17:08,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:17:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 217 transitions. [2020-10-27 14:17:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 14:17:08,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:08,923 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:08,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:17:08,923 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:08,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1053115708, now seen corresponding path program 19 times [2020-10-27 14:17:08,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:08,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701620127] [2020-10-27 14:17:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:08,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:08,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:09,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:13,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:13,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 14:17:13,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:17:13,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:17:13,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:13,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:17:13,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:17:13,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:17:13,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:14,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:14,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:14,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:14,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:14,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:14,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:14,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:14,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:14,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:14,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:14,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:14,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:17:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:14,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:14,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:14,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:14,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:14,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:17:14,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:14,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:14,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:17:14,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:14,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:14,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 14:17:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:14,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:14,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:14,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:14,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:14,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:17:14,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:14,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:14,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:17:14,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:14,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:14,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 14:17:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:14,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:14,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:14,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:14,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:14,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:17:14,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:14,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:14,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:17:14,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:14,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-27 14:17:14,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701620127] [2020-10-27 14:17:14,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:14,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:17:14,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134472438] [2020-10-27 14:17:14,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:17:14,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:14,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:17:14,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:17:14,060 INFO L87 Difference]: Start difference. First operand 178 states and 217 transitions. Second operand 11 states. [2020-10-27 14:17:14,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:14,250 INFO L93 Difference]: Finished difference Result 368 states and 464 transitions. [2020-10-27 14:17:14,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:17:14,250 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2020-10-27 14:17:14,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:14,252 INFO L225 Difference]: With dead ends: 368 [2020-10-27 14:17:14,252 INFO L226 Difference]: Without dead ends: 211 [2020-10-27 14:17:14,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:17:14,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-27 14:17:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 198. [2020-10-27 14:17:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-27 14:17:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 243 transitions. [2020-10-27 14:17:14,281 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 243 transitions. Word has length 76 [2020-10-27 14:17:14,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:14,281 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 243 transitions. [2020-10-27 14:17:14,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:17:14,281 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 243 transitions. [2020-10-27 14:17:14,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:17:14,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:14,282 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:14,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:17:14,283 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:14,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:14,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1671221479, now seen corresponding path program 20 times [2020-10-27 14:17:14,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:14,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574813082] [2020-10-27 14:17:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:14,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:14,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:15,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:19,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:19,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:17:19,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:17:19,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:17:19,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:19,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:17:19,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:17:19,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 14:17:19,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:19,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:19,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:19,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:19,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:19,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:19,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:19,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:19,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:19,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:19,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:19,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:19,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-27 14:17:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:19,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:19,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:19,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:19,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:19,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:19,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:19,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:19,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:19,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:19,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:19,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-27 14:17:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:19,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:19,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:19,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:19,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:19,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:19,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:19,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:19,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:19,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:19,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:19,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-27 14:17:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:19,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:19,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:19,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:19,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:19,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:19,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:19,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:19,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:19,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:19,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-10-27 14:17:19,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574813082] [2020-10-27 14:17:19,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:19,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:17:19,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432876455] [2020-10-27 14:17:19,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:17:19,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:19,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:17:19,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:17:19,543 INFO L87 Difference]: Start difference. First operand 198 states and 243 transitions. Second operand 14 states. [2020-10-27 14:17:20,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:20,244 INFO L93 Difference]: Finished difference Result 238 states and 290 transitions. [2020-10-27 14:17:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:17:20,244 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-10-27 14:17:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:20,247 INFO L225 Difference]: With dead ends: 238 [2020-10-27 14:17:20,247 INFO L226 Difference]: Without dead ends: 234 [2020-10-27 14:17:20,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:17:20,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-27 14:17:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 195. [2020-10-27 14:17:20,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-27 14:17:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 238 transitions. [2020-10-27 14:17:20,276 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 238 transitions. Word has length 81 [2020-10-27 14:17:20,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:20,276 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 238 transitions. [2020-10-27 14:17:20,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:17:20,276 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 238 transitions. [2020-10-27 14:17:20,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:17:20,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:20,278 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:20,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:17:20,278 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:20,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:20,279 INFO L82 PathProgramCache]: Analyzing trace with hash 747368227, now seen corresponding path program 21 times [2020-10-27 14:17:20,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:20,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103395441] [2020-10-27 14:17:20,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:20,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:20,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:21,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:21,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:25,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:25,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:17:25,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:25,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:17:25,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:25,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:17:25,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:17:25,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 14:17:25,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:25,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:25,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:25,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:25,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:25,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:25,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:25,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:25,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:25,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:25,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:25,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:25,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-27 14:17:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:25,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:25,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:25,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:25,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:25,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:25,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:25,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:25,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:25,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:25,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:25,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-27 14:17:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:25,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:25,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:25,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:25,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:25,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:25,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:25,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:25,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:25,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:25,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:25,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-27 14:17:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:25,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:25,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:25,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:25,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:25,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:25,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:25,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:25,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:25,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:25,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 46 proven. 70 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-27 14:17:25,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103395441] [2020-10-27 14:17:25,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:25,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:17:25,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278583294] [2020-10-27 14:17:25,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:17:25,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:25,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:17:25,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:17:25,882 INFO L87 Difference]: Start difference. First operand 195 states and 238 transitions. Second operand 25 states. [2020-10-27 14:17:27,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:27,144 INFO L93 Difference]: Finished difference Result 456 states and 573 transitions. [2020-10-27 14:17:27,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:17:27,145 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2020-10-27 14:17:27,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:27,149 INFO L225 Difference]: With dead ends: 456 [2020-10-27 14:17:27,149 INFO L226 Difference]: Without dead ends: 452 [2020-10-27 14:17:27,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:17:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-10-27 14:17:27,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 233. [2020-10-27 14:17:27,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-27 14:17:27,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 290 transitions. [2020-10-27 14:17:27,188 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 290 transitions. Word has length 81 [2020-10-27 14:17:27,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:27,189 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 290 transitions. [2020-10-27 14:17:27,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:17:27,189 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 290 transitions. [2020-10-27 14:17:27,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:17:27,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:27,191 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:27,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:17:27,191 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:27,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:27,192 INFO L82 PathProgramCache]: Analyzing trace with hash -96637275, now seen corresponding path program 22 times [2020-10-27 14:17:27,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:27,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430688304] [2020-10-27 14:17:27,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:27,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:27,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:28,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:28,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:32,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:32,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:17:32,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:32,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:17:32,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:32,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:17:32,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:17:32,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 14:17:32,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:32,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:32,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:32,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:32,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:32,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:32,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:32,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:32,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:32,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:32,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:32,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:32,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-27 14:17:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:32,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:32,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:32,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:32,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:32,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:32,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:32,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:32,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:32,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:32,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:32,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-27 14:17:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:32,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:32,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:32,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:32,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:32,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:32,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:32,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:32,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:32,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:32,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:32,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-27 14:17:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:32,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:32,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:32,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:32,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:32,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:32,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:32,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:32,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:32,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:32,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 40 proven. 74 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-27 14:17:32,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430688304] [2020-10-27 14:17:32,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:32,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:17:32,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783926265] [2020-10-27 14:17:32,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:17:32,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:32,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:17:32,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:17:32,744 INFO L87 Difference]: Start difference. First operand 233 states and 290 transitions. Second operand 23 states. [2020-10-27 14:17:33,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:33,967 INFO L93 Difference]: Finished difference Result 420 states and 525 transitions. [2020-10-27 14:17:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:17:33,968 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 81 [2020-10-27 14:17:33,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:33,971 INFO L225 Difference]: With dead ends: 420 [2020-10-27 14:17:33,971 INFO L226 Difference]: Without dead ends: 416 [2020-10-27 14:17:33,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:17:33,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-10-27 14:17:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 228. [2020-10-27 14:17:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-27 14:17:33,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 283 transitions. [2020-10-27 14:17:33,999 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 283 transitions. Word has length 81 [2020-10-27 14:17:33,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:33,999 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 283 transitions. [2020-10-27 14:17:33,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:17:33,999 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 283 transitions. [2020-10-27 14:17:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:17:34,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:34,001 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:34,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:17:34,001 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:34,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:34,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1125996573, now seen corresponding path program 23 times [2020-10-27 14:17:34,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:34,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822974025] [2020-10-27 14:17:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:34,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:34,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:35,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:35,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:39,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:39,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:17:39,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:39,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:17:39,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:39,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:17:39,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:17:39,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 14:17:39,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:39,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:39,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:39,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:39,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:39,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:39,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:17:39,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:39,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:39,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:39,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:39,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:39,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-27 14:17:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:39,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:39,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:39,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:39,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:39,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:39,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:39,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:39,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:39,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:39,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:39,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-27 14:17:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:39,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:39,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:39,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:39,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:39,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:39,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:39,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:39,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:39,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:39,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:39,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-27 14:17:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:39,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:39,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:39,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:39,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:39,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:17:39,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:39,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:17:39,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:39,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:17:39,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 11 proven. 71 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-27 14:17:39,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822974025] [2020-10-27 14:17:39,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:39,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:17:39,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100462716] [2020-10-27 14:17:39,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:17:39,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:39,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:17:39,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:17:39,459 INFO L87 Difference]: Start difference. First operand 228 states and 283 transitions. Second operand 19 states. [2020-10-27 14:17:40,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:40,767 INFO L93 Difference]: Finished difference Result 296 states and 369 transitions. [2020-10-27 14:17:40,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:17:40,767 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-10-27 14:17:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:40,770 INFO L225 Difference]: With dead ends: 296 [2020-10-27 14:17:40,770 INFO L226 Difference]: Without dead ends: 292 [2020-10-27 14:17:40,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:17:40,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-27 14:17:40,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 258. [2020-10-27 14:17:40,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-27 14:17:40,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 323 transitions. [2020-10-27 14:17:40,802 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 323 transitions. Word has length 81 [2020-10-27 14:17:40,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:40,802 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 323 transitions. [2020-10-27 14:17:40,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:17:40,803 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 323 transitions. [2020-10-27 14:17:40,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:17:40,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:40,804 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:40,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:17:40,804 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:40,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:40,805 INFO L82 PathProgramCache]: Analyzing trace with hash -682095899, now seen corresponding path program 24 times [2020-10-27 14:17:40,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:40,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678809872] [2020-10-27 14:17:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:40,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:40,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:42,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:42,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:45,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:45,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:17:45,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:45,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:17:45,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:45,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:17:45,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:17:45,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:17:45,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:45,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:45,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:45,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:45,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:45,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:45,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:45,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:45,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:45,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:45,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:45,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:45,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-27 14:17:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:45,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:45,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:45,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:45,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:45,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:17:45,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:17:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:45,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:45,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-27 14:17:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:45,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:45,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:45,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:45,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:45,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:45,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:17:45,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:45,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:45,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-27 14:17:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:45,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:45,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:45,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:45,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:45,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:17:45,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:45,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:45,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:17:45,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:45,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-27 14:17:45,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678809872] [2020-10-27 14:17:45,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:45,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:17:45,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737485792] [2020-10-27 14:17:45,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:17:45,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:45,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:17:45,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:17:45,966 INFO L87 Difference]: Start difference. First operand 258 states and 323 transitions. Second operand 12 states. [2020-10-27 14:17:46,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:46,205 INFO L93 Difference]: Finished difference Result 546 states and 706 transitions. [2020-10-27 14:17:46,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:17:46,206 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-10-27 14:17:46,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:46,209 INFO L225 Difference]: With dead ends: 546 [2020-10-27 14:17:46,209 INFO L226 Difference]: Without dead ends: 311 [2020-10-27 14:17:46,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:17:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-27 14:17:46,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 290. [2020-10-27 14:17:46,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-27 14:17:46,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 365 transitions. [2020-10-27 14:17:46,242 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 365 transitions. Word has length 81 [2020-10-27 14:17:46,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:46,242 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 365 transitions. [2020-10-27 14:17:46,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:17:46,242 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 365 transitions. [2020-10-27 14:17:46,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 14:17:46,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:46,243 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:46,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:17:46,244 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:46,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:46,244 INFO L82 PathProgramCache]: Analyzing trace with hash -449786198, now seen corresponding path program 25 times [2020-10-27 14:17:46,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:46,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335247675] [2020-10-27 14:17:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:46,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:46,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:47,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:47,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:51,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:51,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 14:17:51,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:51,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:17:51,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:51,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:17:51,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:17:51,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 14:17:51,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:51,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:51,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:51,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:51,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:51,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:51,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:51,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:51,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:51,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:51,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:51,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:51,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-27 14:17:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:51,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:51,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:51,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:51,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:51,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:51,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:51,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:51,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:51,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:51,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:51,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-27 14:17:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:51,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:51,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:51,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:51,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:51,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:17:51,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:51,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:17:51,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:51,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:17:51,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:51,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-27 14:17:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:51,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:51,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:51,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:51,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:51,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:17:51,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:51,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:51,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:51,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:51,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 8 proven. 82 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-27 14:17:51,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335247675] [2020-10-27 14:17:51,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:51,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:17:51,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510003161] [2020-10-27 14:17:51,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:17:51,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:51,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:17:51,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:17:51,691 INFO L87 Difference]: Start difference. First operand 290 states and 365 transitions. Second operand 19 states. [2020-10-27 14:17:53,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:53,002 INFO L93 Difference]: Finished difference Result 421 states and 535 transitions. [2020-10-27 14:17:53,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:17:53,003 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2020-10-27 14:17:53,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:53,006 INFO L225 Difference]: With dead ends: 421 [2020-10-27 14:17:53,006 INFO L226 Difference]: Without dead ends: 417 [2020-10-27 14:17:53,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:17:53,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-27 14:17:53,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 344. [2020-10-27 14:17:53,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-27 14:17:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 437 transitions. [2020-10-27 14:17:53,054 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 437 transitions. Word has length 86 [2020-10-27 14:17:53,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:17:53,055 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 437 transitions. [2020-10-27 14:17:53,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:17:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 437 transitions. [2020-10-27 14:17:53,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 14:17:53,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:17:53,056 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:17:53,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:17:53,057 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:17:53,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:17:53,057 INFO L82 PathProgramCache]: Analyzing trace with hash 110913580, now seen corresponding path program 26 times [2020-10-27 14:17:53,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:17:53,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328510780] [2020-10-27 14:17:53,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:17:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:53,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:53,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:55,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:55,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:58,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:58,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 14:17:58,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:17:58,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:17:58,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:58,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:17:58,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:17:58,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 14:17:58,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:58,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:17:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:58,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:58,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:58,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:17:58,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:58,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:17:58,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:58,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:17:58,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:58,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:17:58,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:58,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-27 14:17:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:58,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:58,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:58,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:58,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:58,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:17:58,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:58,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:17:58,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:58,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:17:58,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:58,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-27 14:17:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:58,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:58,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:58,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:58,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:58,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:58,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:58,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:58,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:58,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:58,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:58,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-27 14:17:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:17:58,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:17:58,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:17:58,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:17:58,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:17:58,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:17:58,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:17:58,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:17:58,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:17:58,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:17:58,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:17:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 5 proven. 85 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-27 14:17:58,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328510780] [2020-10-27 14:17:58,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:17:58,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:17:58,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155307805] [2020-10-27 14:17:58,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:17:58,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:17:58,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:17:58,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:17:58,627 INFO L87 Difference]: Start difference. First operand 344 states and 437 transitions. Second operand 18 states. [2020-10-27 14:17:59,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:17:59,960 INFO L93 Difference]: Finished difference Result 389 states and 492 transitions. [2020-10-27 14:17:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:17:59,961 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 86 [2020-10-27 14:17:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:17:59,965 INFO L225 Difference]: With dead ends: 389 [2020-10-27 14:17:59,966 INFO L226 Difference]: Without dead ends: 385 [2020-10-27 14:17:59,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:17:59,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-27 14:18:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 258. [2020-10-27 14:18:00,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-27 14:18:00,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 322 transitions. [2020-10-27 14:18:00,004 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 322 transitions. Word has length 86 [2020-10-27 14:18:00,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:00,005 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 322 transitions. [2020-10-27 14:18:00,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:18:00,005 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 322 transitions. [2020-10-27 14:18:00,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 14:18:00,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:00,006 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:00,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:18:00,007 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:00,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:00,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1196849154, now seen corresponding path program 6 times [2020-10-27 14:18:00,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:00,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630766471] [2020-10-27 14:18:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:00,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:00,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:01,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:05,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:05,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 14:18:05,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:18:05,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:18:05,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:05,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:18:05,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:18:05,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 14:18:05,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:05,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:05,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:05,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:05,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:05,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:05,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:18:05,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:05,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:05,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:05,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:05,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:05,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-27 14:18:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:05,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:05,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:05,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:05,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:05,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:18:05,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:05,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:05,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-27 14:18:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:05,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:05,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:05,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:05,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:05,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:05,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:05,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:05,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:05,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:05,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-27 14:18:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:05,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:05,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:05,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:05,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:05,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:05,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:05,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:05,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:05,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:05,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:05,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-27 14:18:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:05,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:05,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:05,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:05,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:05,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:05,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:05,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:05,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:05,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:05,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 34 proven. 123 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-27 14:18:05,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630766471] [2020-10-27 14:18:05,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:05,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:18:05,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122350133] [2020-10-27 14:18:05,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:18:05,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:05,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:18:05,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:18:05,714 INFO L87 Difference]: Start difference. First operand 258 states and 322 transitions. Second operand 26 states. [2020-10-27 14:18:07,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:07,307 INFO L93 Difference]: Finished difference Result 547 states and 695 transitions. [2020-10-27 14:18:07,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:18:07,308 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 94 [2020-10-27 14:18:07,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:07,311 INFO L225 Difference]: With dead ends: 547 [2020-10-27 14:18:07,311 INFO L226 Difference]: Without dead ends: 543 [2020-10-27 14:18:07,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:18:07,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2020-10-27 14:18:07,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 386. [2020-10-27 14:18:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-10-27 14:18:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 493 transitions. [2020-10-27 14:18:07,376 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 493 transitions. Word has length 94 [2020-10-27 14:18:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:07,377 INFO L481 AbstractCegarLoop]: Abstraction has 386 states and 493 transitions. [2020-10-27 14:18:07,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:18:07,377 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 493 transitions. [2020-10-27 14:18:07,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 14:18:07,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:07,378 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:07,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:18:07,379 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:07,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:07,379 INFO L82 PathProgramCache]: Analyzing trace with hash 299455876, now seen corresponding path program 27 times [2020-10-27 14:18:07,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:07,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402447850] [2020-10-27 14:18:07,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:07,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:07,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:09,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:12,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:12,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 14:18:12,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:18:12,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:18:12,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:12,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:18:12,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:18:12,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:18:12,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:12,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:12,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:12,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:12,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:12,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:12,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:18:12,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:12,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:12,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:12,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:12,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:12,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-27 14:18:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:12,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:12,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:12,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:12,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:12,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:18:12,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:12,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:12,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:18:12,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:12,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:12,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-27 14:18:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:12,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:12,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:12,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:12,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:12,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:18:12,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:12,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:12,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:18:12,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:12,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:12,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-27 14:18:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:12,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:12,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:12,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:12,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:12,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:18:12,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:12,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:12,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:18:12,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:12,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:12,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-27 14:18:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:12,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:12,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:12,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:12,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:12,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:18:12,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:12,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:12,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:18:12,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:12,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 8 proven. 117 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-10-27 14:18:12,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402447850] [2020-10-27 14:18:12,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:12,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:18:12,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81240097] [2020-10-27 14:18:12,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:18:12,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:12,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:18:12,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:18:12,564 INFO L87 Difference]: Start difference. First operand 386 states and 493 transitions. Second operand 13 states. [2020-10-27 14:18:12,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:12,848 INFO L93 Difference]: Finished difference Result 839 states and 1106 transitions. [2020-10-27 14:18:12,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:18:12,849 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 94 [2020-10-27 14:18:12,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:12,852 INFO L225 Difference]: With dead ends: 839 [2020-10-27 14:18:12,852 INFO L226 Difference]: Without dead ends: 478 [2020-10-27 14:18:12,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:18:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-10-27 14:18:12,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 441. [2020-10-27 14:18:12,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-27 14:18:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 565 transitions. [2020-10-27 14:18:12,915 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 565 transitions. Word has length 94 [2020-10-27 14:18:12,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:12,916 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 565 transitions. [2020-10-27 14:18:12,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:18:12,916 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 565 transitions. [2020-10-27 14:18:12,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 14:18:12,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:12,918 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 5, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:12,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 14:18:12,918 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:12,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:12,918 INFO L82 PathProgramCache]: Analyzing trace with hash -395317861, now seen corresponding path program 28 times [2020-10-27 14:18:12,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:12,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811962841] [2020-10-27 14:18:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:12,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:12,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:15,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:17,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:17,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 14:18:17,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:18:17,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:18:17,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:17,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:18:17,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:18:17,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:18:17,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:18,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:18,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:18,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:18,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:18,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:18,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:18,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:18,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:18,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:18,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:18,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:18,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-27 14:18:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:18,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:18,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:18,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:18,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:18,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:18:18,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:18:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:18,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:18,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-27 14:18:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:18,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:18,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:18,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:18,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:18,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:18:18,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:18,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:18,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:18:18,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:18,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:18,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-27 14:18:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:18,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:18,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:18,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:18,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:18,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:18:18,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:18:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:18,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:18,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-27 14:18:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:18,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:18,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:18,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:18,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:18,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:18:18,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:18,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:18,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:18:18,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:18,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 8 proven. 145 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-27 14:18:18,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811962841] [2020-10-27 14:18:18,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:18,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:18:18,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587078918] [2020-10-27 14:18:18,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:18:18,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:18,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:18:18,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:18:18,138 INFO L87 Difference]: Start difference. First operand 441 states and 565 transitions. Second operand 14 states. [2020-10-27 14:18:18,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:18,402 INFO L93 Difference]: Finished difference Result 948 states and 1250 transitions. [2020-10-27 14:18:18,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:18:18,403 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 99 [2020-10-27 14:18:18,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:18,407 INFO L225 Difference]: With dead ends: 948 [2020-10-27 14:18:18,407 INFO L226 Difference]: Without dead ends: 534 [2020-10-27 14:18:18,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:18:18,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2020-10-27 14:18:18,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 497. [2020-10-27 14:18:18,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-10-27 14:18:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 639 transitions. [2020-10-27 14:18:18,486 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 639 transitions. Word has length 99 [2020-10-27 14:18:18,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:18,486 INFO L481 AbstractCegarLoop]: Abstraction has 497 states and 639 transitions. [2020-10-27 14:18:18,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:18:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 639 transitions. [2020-10-27 14:18:18,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 14:18:18,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:18,489 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 8, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:18,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 14:18:18,489 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:18,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:18,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1172455080, now seen corresponding path program 29 times [2020-10-27 14:18:18,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:18,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537313929] [2020-10-27 14:18:18,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:18,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:18,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:21,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:23,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:23,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 14:18:23,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:18:23,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:18:23,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:23,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:18:23,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:18:23,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 14:18:23,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:24,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:24,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:24,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:24,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:24,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:24,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:18:24,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:24,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:24,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:24,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:24,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:24,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-27 14:18:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:24,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:24,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:24,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:24,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:24,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:24,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:24,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:24,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:24,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:24,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:24,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-27 14:18:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:24,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:24,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:24,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:24,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:24,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:24,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:24,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:24,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:24,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:24,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:24,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-27 14:18:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:24,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:24,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:24,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:24,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:24,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:24,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:24,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:24,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:24,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:24,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:24,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-10-27 14:18:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:24,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:24,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:24,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:24,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:24,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:24,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:24,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:24,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:24,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:24,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 41 proven. 160 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-10-27 14:18:24,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537313929] [2020-10-27 14:18:24,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:24,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:18:24,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931624650] [2020-10-27 14:18:24,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:18:24,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:24,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:18:24,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:18:24,118 INFO L87 Difference]: Start difference. First operand 497 states and 639 transitions. Second operand 24 states. [2020-10-27 14:18:25,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:25,655 INFO L93 Difference]: Finished difference Result 662 states and 844 transitions. [2020-10-27 14:18:25,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:18:25,659 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 104 [2020-10-27 14:18:25,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:25,662 INFO L225 Difference]: With dead ends: 662 [2020-10-27 14:18:25,662 INFO L226 Difference]: Without dead ends: 658 [2020-10-27 14:18:25,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:18:25,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-10-27 14:18:25,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 489. [2020-10-27 14:18:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-10-27 14:18:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 628 transitions. [2020-10-27 14:18:25,743 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 628 transitions. Word has length 104 [2020-10-27 14:18:25,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:25,743 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 628 transitions. [2020-10-27 14:18:25,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:18:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 628 transitions. [2020-10-27 14:18:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 14:18:25,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:25,745 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:25,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 14:18:25,745 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:25,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:25,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1584172186, now seen corresponding path program 30 times [2020-10-27 14:18:25,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:25,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119477806] [2020-10-27 14:18:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:25,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:25,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:28,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:30,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:30,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 14:18:30,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:18:30,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:18:30,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:30,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:18:30,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:18:30,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:18:30,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:30,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:30,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:30,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:30,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:30,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:30,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:30,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:30,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:30,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:30,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:30,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:30,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-27 14:18:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:30,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:30,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:30,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:30,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:30,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:18:30,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:30,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:30,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:18:30,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:30,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:30,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-27 14:18:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:30,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:30,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:30,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:30,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:30,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:30,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:30,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:30,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:18:30,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:30,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:30,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-27 14:18:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:30,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:30,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:30,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:30,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:30,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:18:30,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:30,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:30,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:18:30,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:30,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:30,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-10-27 14:18:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:30,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:30,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:30,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:30,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:30,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:18:30,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:30,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:30,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:18:30,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:30,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 8 proven. 176 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-10-27 14:18:30,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119477806] [2020-10-27 14:18:30,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:30,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:18:30,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891682069] [2020-10-27 14:18:30,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:18:30,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:30,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:18:30,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:18:30,995 INFO L87 Difference]: Start difference. First operand 489 states and 628 transitions. Second operand 15 states. [2020-10-27 14:18:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:31,308 INFO L93 Difference]: Finished difference Result 1037 states and 1366 transitions. [2020-10-27 14:18:31,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:18:31,309 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 104 [2020-10-27 14:18:31,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:31,312 INFO L225 Difference]: With dead ends: 1037 [2020-10-27 14:18:31,313 INFO L226 Difference]: Without dead ends: 577 [2020-10-27 14:18:31,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:18:31,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2020-10-27 14:18:31,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 542. [2020-10-27 14:18:31,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 542 states. [2020-10-27 14:18:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 698 transitions. [2020-10-27 14:18:31,399 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 698 transitions. Word has length 104 [2020-10-27 14:18:31,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:31,399 INFO L481 AbstractCegarLoop]: Abstraction has 542 states and 698 transitions. [2020-10-27 14:18:31,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:18:31,400 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 698 transitions. [2020-10-27 14:18:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 14:18:31,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:31,402 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 7, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:31,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 14:18:31,402 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:31,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:31,402 INFO L82 PathProgramCache]: Analyzing trace with hash -963404039, now seen corresponding path program 31 times [2020-10-27 14:18:31,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:31,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977118585] [2020-10-27 14:18:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:31,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:31,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:35,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:36,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:36,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 14:18:36,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:18:36,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:18:36,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:36,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:18:36,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:18:36,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 14:18:36,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:36,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:36,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:36,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:36,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:36,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:36,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:18:36,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:36,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:36,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:36,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:36,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:36,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-27 14:18:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:36,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:36,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:36,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:36,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:36,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:18:36,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:36,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:36,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:36,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:36,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:36,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-27 14:18:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:36,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:36,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:36,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:36,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:36,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:36,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:36,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:36,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:36,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:36,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:36,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-27 14:18:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:36,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:36,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:36,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:36,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:36,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:36,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:36,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:36,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:36,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:36,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:36,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 14:18:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:36,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:37,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:37,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:18:37,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:37,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:18:37,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:37,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:37,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:37,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:37,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 35 proven. 175 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2020-10-27 14:18:37,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977118585] [2020-10-27 14:18:37,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:37,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:18:37,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079996719] [2020-10-27 14:18:37,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:18:37,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:37,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:18:37,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:18:37,039 INFO L87 Difference]: Start difference. First operand 542 states and 698 transitions. Second operand 22 states. [2020-10-27 14:18:38,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:38,365 INFO L93 Difference]: Finished difference Result 688 states and 879 transitions. [2020-10-27 14:18:38,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:18:38,366 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2020-10-27 14:18:38,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:38,370 INFO L225 Difference]: With dead ends: 688 [2020-10-27 14:18:38,370 INFO L226 Difference]: Without dead ends: 684 [2020-10-27 14:18:38,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:18:38,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2020-10-27 14:18:38,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 528. [2020-10-27 14:18:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528 states. [2020-10-27 14:18:38,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 679 transitions. [2020-10-27 14:18:38,443 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 679 transitions. Word has length 109 [2020-10-27 14:18:38,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:38,443 INFO L481 AbstractCegarLoop]: Abstraction has 528 states and 679 transitions. [2020-10-27 14:18:38,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:18:38,443 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 679 transitions. [2020-10-27 14:18:38,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 14:18:38,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:38,446 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:38,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 14:18:38,446 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:38,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:38,446 INFO L82 PathProgramCache]: Analyzing trace with hash -529674953, now seen corresponding path program 32 times [2020-10-27 14:18:38,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:38,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775723499] [2020-10-27 14:18:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:38,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:38,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking...