/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-lit/gj2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:41:15,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:41:15,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:41:16,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:41:16,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:41:16,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:41:16,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:41:16,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:41:16,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:41:16,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:41:16,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:41:16,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:41:16,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:41:16,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:41:16,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:41:16,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:41:16,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:41:16,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:41:16,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:41:16,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:41:16,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:41:16,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:41:16,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:41:16,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:41:16,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:41:16,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:41:16,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:41:16,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:41:16,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:41:16,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:41:16,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:41:16,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:41:16,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:41:16,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:41:16,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:41:16,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:41:16,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:41:16,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:41:16,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:41:16,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:41:16,119 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:41:16,127 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 01:41:16,181 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:41:16,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:41:16,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:41:16,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:41:16,186 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:41:16,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:41:16,187 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:41:16,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:41:16,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:41:16,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:41:16,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:41:16,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:41:16,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:41:16,190 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:41:16,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:41:16,191 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:41:16,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:41:16,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:41:16,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:41:16,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:41:16,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:41:16,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:41:16,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:41:16,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:41:16,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:41:16,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:41:16,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:41:16,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:41:16,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:41:16,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:41:16,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:41:16,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:41:16,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:41:16,676 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:41:16,677 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:41:16,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.i [2020-10-27 01:41:16,765 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc6d46e37/674792150d5744c99603b5a7e40085a1/FLAG40c27acbf [2020-10-27 01:41:17,495 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:41:17,496 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gj2007.i [2020-10-27 01:41:17,505 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc6d46e37/674792150d5744c99603b5a7e40085a1/FLAG40c27acbf [2020-10-27 01:41:17,833 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc6d46e37/674792150d5744c99603b5a7e40085a1 [2020-10-27 01:41:17,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:41:17,843 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:41:17,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:41:17,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:41:17,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:41:17,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:41:17" (1/1) ... [2020-10-27 01:41:17,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e730c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:17, skipping insertion in model container [2020-10-27 01:41:17,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:41:17" (1/1) ... [2020-10-27 01:41:17,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:41:17,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:41:18,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:41:18,108 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:41:18,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:41:18,145 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:41:18,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:18 WrapperNode [2020-10-27 01:41:18,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:41:18,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:41:18,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:41:18,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:41:18,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:18" (1/1) ... [2020-10-27 01:41:18,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:18" (1/1) ... [2020-10-27 01:41:18,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:18" (1/1) ... [2020-10-27 01:41:18,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:18" (1/1) ... [2020-10-27 01:41:18,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:18" (1/1) ... [2020-10-27 01:41:18,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:18" (1/1) ... [2020-10-27 01:41:18,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:18" (1/1) ... [2020-10-27 01:41:18,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:41:18,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:41:18,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:41:18,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:41:18,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:18" (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 01:41:18,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:41:18,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:41:18,278 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:41:18,278 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 01:41:18,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:41:18,279 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:41:18,279 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:41:18,279 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:41:18,279 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:41:18,280 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:41:18,280 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:41:18,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:41:18,280 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 01:41:18,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:41:18,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:41:18,281 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:41:18,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:41:18,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:41:18,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:41:18,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:41:18,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:41:18,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:41:18,620 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:41:18,620 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:41:18,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:41:18 BoogieIcfgContainer [2020-10-27 01:41:18,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:41:18,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:41:18,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:41:18,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:41:18,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:41:17" (1/3) ... [2020-10-27 01:41:18,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae3c8e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:41:18, skipping insertion in model container [2020-10-27 01:41:18,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:18" (2/3) ... [2020-10-27 01:41:18,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae3c8e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:41:18, skipping insertion in model container [2020-10-27 01:41:18,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:41:18" (3/3) ... [2020-10-27 01:41:18,634 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.i [2020-10-27 01:41:18,660 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:41:18,666 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:41:18,684 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:41:18,727 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:41:18,727 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:41:18,727 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:41:18,728 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:41:18,728 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:41:18,728 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:41:18,728 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:41:18,728 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:41:18,750 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 01:41:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:41:18,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:18,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:18,759 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:18,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:18,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1042563823, now seen corresponding path program 1 times [2020-10-27 01:41:18,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:18,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619948590] [2020-10-27 01:41:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:18,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:19,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:19,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:41:19,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:19,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-27 01:41:19,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:19,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:19,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:41:19,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:19,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-27 01:41:19,248 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-27 01:41:19,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:19,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:19,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:19,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:19,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:19,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 01:41:19,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:19,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:19,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:19,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:19,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:19,328 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 01:41:19,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619948590] [2020-10-27 01:41:19,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:41:19,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:41:19,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804767432] [2020-10-27 01:41:19,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:41:19,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:19,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:41:19,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:41:19,369 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-27 01:41:19,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:19,487 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-27 01:41:19,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:41:19,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-27 01:41:19,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:19,507 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:41:19,508 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 01:41:19,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:41:19,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 01:41:19,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 01:41:19,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 01:41:19,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-27 01:41:19,563 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-10-27 01:41:19,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:19,564 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-27 01:41:19,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:41:19,565 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-27 01:41:19,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:41:19,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:19,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:19,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:41:19,568 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:19,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:19,569 INFO L82 PathProgramCache]: Analyzing trace with hash 757461605, now seen corresponding path program 1 times [2020-10-27 01:41:19,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:19,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401911255] [2020-10-27 01:41:19,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:19,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:19,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:19,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:41:19,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:19,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-27 01:41:19,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:19,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:41:19,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:19,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:41:19,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:19,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:19,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:19,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:19,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:19,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:19,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:41:19,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:19,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:19,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:19,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:19,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:19,771 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 01:41:19,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401911255] [2020-10-27 01:41:19,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:41:19,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:41:19,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381267478] [2020-10-27 01:41:19,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:41:19,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:19,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:41:19,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:41:19,775 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-27 01:41:19,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:19,890 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-10-27 01:41:19,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:41:19,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 01:41:19,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:19,891 INFO L225 Difference]: With dead ends: 26 [2020-10-27 01:41:19,892 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 01:41:19,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:41:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 01:41:19,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 01:41:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:41:19,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-27 01:41:19,902 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-10-27 01:41:19,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:19,902 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-27 01:41:19,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:41:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-27 01:41:19,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:41:19,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:19,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:19,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:41:19,904 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:19,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:19,905 INFO L82 PathProgramCache]: Analyzing trace with hash 32255874, now seen corresponding path program 1 times [2020-10-27 01:41:19,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:19,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381235467] [2020-10-27 01:41:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:19,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:19,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:19,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:41:19,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:19,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-27 01:41:19,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:19,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:41:19,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:41:19,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:41:19,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:41:20,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:20,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:20,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:20,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:20,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:20,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:41:20,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:20,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:20,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:20,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:20,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:20,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381235467] [2020-10-27 01:41:20,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:41:20,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:41:20,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129874459] [2020-10-27 01:41:20,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:41:20,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:20,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:41:20,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:41:20,096 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-10-27 01:41:20,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:20,173 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-27 01:41:20,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:41:20,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 01:41:20,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:20,175 INFO L225 Difference]: With dead ends: 26 [2020-10-27 01:41:20,175 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:41:20,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:41:20,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:41:20,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-27 01:41:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 01:41:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-27 01:41:20,185 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-10-27 01:41:20,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:20,185 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-27 01:41:20,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:41:20,186 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-27 01:41:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:41:20,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:20,187 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:20,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:41:20,187 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:20,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:20,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1915096291, now seen corresponding path program 1 times [2020-10-27 01:41:20,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:20,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792544418] [2020-10-27 01:41:20,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:20,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:20,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:20,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:20,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:41:20,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:20,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-27 01:41:20,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:20,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:41:20,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:20,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:41:20,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:41:20,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:20,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:20,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:20,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:20,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:20,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:41:20,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:20,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:20,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:20,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:20,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:41:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:20,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792544418] [2020-10-27 01:41:20,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:20,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:41:20,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267828796] [2020-10-27 01:41:20,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:41:20,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:20,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:41:20,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:41:20,477 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-10-27 01:41:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:20,587 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-27 01:41:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:41:20,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 01:41:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:20,589 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:41:20,589 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 01:41:20,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:41:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 01:41:20,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 01:41:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 01:41:20,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-27 01:41:20,598 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-27 01:41:20,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:20,598 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-27 01:41:20,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:41:20,598 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-27 01:41:20,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:41:20,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:20,599 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:20,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:41:20,600 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:20,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:20,601 INFO L82 PathProgramCache]: Analyzing trace with hash -321758790, now seen corresponding path program 2 times [2020-10-27 01:41:20,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:20,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319481271] [2020-10-27 01:41:20,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:20,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:20,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:20,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:20,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:41:20,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:20,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-27 01:41:20,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:41:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:20,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:41:20,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:20,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:20,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:20,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:20,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:20,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:20,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:41:20,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:20,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:20,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:20,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:20,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:41:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:20,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319481271] [2020-10-27 01:41:20,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:20,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:41:20,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247399717] [2020-10-27 01:41:20,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:41:20,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:20,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:41:20,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:41:20,926 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-27 01:41:21,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:21,078 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-27 01:41:21,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:41:21,079 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 01:41:21,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:21,080 INFO L225 Difference]: With dead ends: 32 [2020-10-27 01:41:21,080 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 01:41:21,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:41:21,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 01:41:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 01:41:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:41:21,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-27 01:41:21,088 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-27 01:41:21,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:21,088 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-27 01:41:21,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:41:21,089 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-27 01:41:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:41:21,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:21,090 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:21,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:41:21,090 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:21,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:21,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1867222295, now seen corresponding path program 3 times [2020-10-27 01:41:21,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:21,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634163489] [2020-10-27 01:41:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:21,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:21,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:21,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:21,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:41:21,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:21,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-27 01:41:21,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:21,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:41:21,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:21,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:41:21,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:21,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:21,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:21,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:21,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:21,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:21,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:41:21,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:21,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:21,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634163489] [2020-10-27 01:41:21,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:21,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:41:21,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491407619] [2020-10-27 01:41:21,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:41:21,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:21,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:41:21,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:41:21,361 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2020-10-27 01:41:21,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:21,531 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-27 01:41:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:41:21,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 01:41:21,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:21,533 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:41:21,533 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:41:21,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:21,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:41:21,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-27 01:41:21,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:41:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-27 01:41:21,540 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-10-27 01:41:21,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:21,541 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-27 01:41:21,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:41:21,541 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-27 01:41:21,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:41:21,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:21,542 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:21,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:41:21,543 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:21,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:21,543 INFO L82 PathProgramCache]: Analyzing trace with hash 944069940, now seen corresponding path program 4 times [2020-10-27 01:41:21,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:21,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618157877] [2020-10-27 01:41:21,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:21,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:21,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:21,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:21,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:41:21,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:21,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-27 01:41:21,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:21,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:41:21,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:21,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:41:21,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:21,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:21,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:21,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:21,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:21,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:21,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:41:21,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:21,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:21,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:21,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:21,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:21,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618157877] [2020-10-27 01:41:21,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:21,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:41:21,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245063309] [2020-10-27 01:41:21,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:41:21,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:21,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:41:21,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:41:21,752 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-10-27 01:41:21,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:21,969 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-27 01:41:21,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:41:21,969 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-27 01:41:21,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:21,970 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:41:21,970 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 01:41:21,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:41:21,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 01:41:21,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 01:41:21,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:41:21,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-27 01:41:21,978 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-10-27 01:41:21,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:21,978 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-27 01:41:21,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:41:21,979 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-27 01:41:21,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:41:21,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:21,980 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:21,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:41:21,980 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:21,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:21,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1442080239, now seen corresponding path program 5 times [2020-10-27 01:41:21,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:21,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572115654] [2020-10-27 01:41:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:22,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:22,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:22,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:22,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:41:22,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:22,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-27 01:41:22,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:22,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:41:22,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:22,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:41:22,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:22,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:22,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:22,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:22,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:22,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:22,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:41:22,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:22,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:22,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:22,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:22,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:22,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572115654] [2020-10-27 01:41:22,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:22,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:41:22,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993336524] [2020-10-27 01:41:22,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:41:22,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:22,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:41:22,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:41:22,283 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 9 states. [2020-10-27 01:41:22,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:22,540 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-27 01:41:22,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:41:22,540 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 01:41:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:22,541 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:41:22,541 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:41:22,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:41:22,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:41:22,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 01:41:22,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:41:22,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-27 01:41:22,549 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-10-27 01:41:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:22,549 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-27 01:41:22,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:41:22,550 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-27 01:41:22,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:41:22,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:22,551 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:22,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:41:22,551 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:22,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:22,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1019866194, now seen corresponding path program 6 times [2020-10-27 01:41:22,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:22,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903262087] [2020-10-27 01:41:22,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:22,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:22,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:22,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:22,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:41:22,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:22,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-27 01:41:22,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:22,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:41:22,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:22,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:41:22,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:22,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:22,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:22,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:22,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:22,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:22,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:41:22,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:22,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:22,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:22,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:22,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:22,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903262087] [2020-10-27 01:41:22,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:22,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:41:22,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398417533] [2020-10-27 01:41:22,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:41:22,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:22,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:41:22,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:41:22,853 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 10 states. [2020-10-27 01:41:23,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:23,186 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-27 01:41:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:41:23,187 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:41:23,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:23,187 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:41:23,187 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:41:23,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:41:23,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:41:23,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 01:41:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:41:23,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-27 01:41:23,204 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-10-27 01:41:23,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:23,205 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-27 01:41:23,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:41:23,205 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-27 01:41:23,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:41:23,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:23,206 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:23,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:41:23,209 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:23,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:23,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1000905227, now seen corresponding path program 7 times [2020-10-27 01:41:23,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:23,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516320341] [2020-10-27 01:41:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:23,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:23,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:23,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:23,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:41:23,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:23,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-27 01:41:23,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:23,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:23,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:23,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:41:23,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:23,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:23,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:23,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:23,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:23,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:23,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:41:23,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:23,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:23,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:23,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:23,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:23,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516320341] [2020-10-27 01:41:23,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:23,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:23,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760461650] [2020-10-27 01:41:23,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:23,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:23,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:23,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:23,559 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-10-27 01:41:23,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:23,938 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-10-27 01:41:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:23,939 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-27 01:41:23,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:23,940 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:41:23,940 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 01:41:23,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:23,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 01:41:23,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 01:41:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:41:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-27 01:41:23,948 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-10-27 01:41:23,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:23,948 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-27 01:41:23,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-27 01:41:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:41:23,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:23,949 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:23,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:41:23,949 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:23,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:23,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1637023016, now seen corresponding path program 8 times [2020-10-27 01:41:23,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:23,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140874841] [2020-10-27 01:41:23,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:23,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:23,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:24,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:24,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:41:24,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:24,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-27 01:41:24,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:24,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:41:24,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:24,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:41:24,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:24,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:24,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:24,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:24,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:24,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:24,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:41:24,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:24,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:24,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:24,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:24,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:24,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140874841] [2020-10-27 01:41:24,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:24,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:41:24,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672366895] [2020-10-27 01:41:24,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:41:24,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:24,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:41:24,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:41:24,303 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2020-10-27 01:41:24,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:24,734 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-27 01:41:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:41:24,734 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 01:41:24,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:24,735 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:41:24,736 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:41:24,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:41:24,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:41:24,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-27 01:41:24,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:41:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-27 01:41:24,744 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-10-27 01:41:24,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:24,745 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-27 01:41:24,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:41:24,745 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-27 01:41:24,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:41:24,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:24,746 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:24,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:41:24,746 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:24,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:24,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1234105083, now seen corresponding path program 9 times [2020-10-27 01:41:24,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:24,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072750604] [2020-10-27 01:41:24,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:24,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:24,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:24,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:24,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:41:24,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:24,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-27 01:41:24,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:24,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:41:24,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:24,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:41:24,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:25,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:25,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:25,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:25,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:25,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:25,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:25,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:25,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:25,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:25,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:25,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:25,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072750604] [2020-10-27 01:41:25,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:25,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:41:25,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036779224] [2020-10-27 01:41:25,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:41:25,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:25,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:41:25,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:41:25,116 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-10-27 01:41:25,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:25,539 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-10-27 01:41:25,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:41:25,540 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-27 01:41:25,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:25,541 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:41:25,541 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 01:41:25,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:41:25,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 01:41:25,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-27 01:41:25,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:41:25,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-27 01:41:25,550 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2020-10-27 01:41:25,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:25,550 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-27 01:41:25,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:41:25,550 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-27 01:41:25,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:41:25,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:25,552 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:25,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:41:25,552 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:25,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:25,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1275763106, now seen corresponding path program 10 times [2020-10-27 01:41:25,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:25,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902811258] [2020-10-27 01:41:25,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:25,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:25,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:25,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:25,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:41:25,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:25,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-27 01:41:25,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:25,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:41:25,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:25,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:41:25,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:41:25,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:25,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:25,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:25,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:25,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:25,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:25,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:25,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:25,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:25,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:25,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:25,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902811258] [2020-10-27 01:41:25,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:25,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:41:25,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625834498] [2020-10-27 01:41:25,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:41:25,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:25,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:41:25,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:41:25,939 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-10-27 01:41:26,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:26,451 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-10-27 01:41:26,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:41:26,453 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-27 01:41:26,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:26,454 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:41:26,454 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 01:41:26,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:41:26,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 01:41:26,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-27 01:41:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:41:26,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-27 01:41:26,468 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2020-10-27 01:41:26,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:26,470 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-27 01:41:26,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:41:26,470 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-27 01:41:26,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:41:26,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:26,471 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:26,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:41:26,471 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:26,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:26,472 INFO L82 PathProgramCache]: Analyzing trace with hash -512527617, now seen corresponding path program 11 times [2020-10-27 01:41:26,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:26,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224998079] [2020-10-27 01:41:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:26,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:26,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:26,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:26,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:41:26,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:26,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-27 01:41:26,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:26,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:41:26,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:26,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:41:26,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:26,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:26,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:26,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:26,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:26,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:26,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:26,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:26,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:26,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:26,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:26,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:26,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224998079] [2020-10-27 01:41:26,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:26,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:41:26,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175743979] [2020-10-27 01:41:26,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:41:26,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:26,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:41:26,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:41:26,987 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2020-10-27 01:41:27,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:27,540 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-27 01:41:27,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:41:27,540 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-27 01:41:27,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:27,541 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:41:27,541 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 01:41:27,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:41:27,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 01:41:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 01:41:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:41:27,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-27 01:41:27,550 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2020-10-27 01:41:27,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:27,551 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-27 01:41:27,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:41:27,551 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-27 01:41:27,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:41:27,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:27,552 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:27,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:41:27,552 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:27,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1072994020, now seen corresponding path program 12 times [2020-10-27 01:41:27,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:27,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667736951] [2020-10-27 01:41:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:27,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:27,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:27,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:27,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:41:27,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:27,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-27 01:41:27,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:27,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:41:27,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:27,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:41:27,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:27,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:27,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:27,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:27,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:27,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:27,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:27,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:27,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:27,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:27,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:27,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:27,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667736951] [2020-10-27 01:41:27,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:27,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:41:27,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522007948] [2020-10-27 01:41:27,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:41:27,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:27,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:41:27,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:41:27,982 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 16 states. [2020-10-27 01:41:28,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:28,585 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-10-27 01:41:28,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:41:28,586 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-27 01:41:28,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:28,587 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:41:28,587 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:41:28,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:41:28,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:41:28,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 01:41:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:41:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-27 01:41:28,595 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2020-10-27 01:41:28,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:28,595 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-27 01:41:28,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:41:28,595 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-27 01:41:28,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:41:28,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:28,596 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:28,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:41:28,597 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:28,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:28,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1484671993, now seen corresponding path program 13 times [2020-10-27 01:41:28,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:28,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442319677] [2020-10-27 01:41:28,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:28,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:28,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:28,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:28,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:41:28,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:28,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-27 01:41:28,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:28,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:41:28,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:28,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:41:28,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:29,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:29,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:29,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:29,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:29,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:29,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:41:29,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:29,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:29,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:29,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:29,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:29,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442319677] [2020-10-27 01:41:29,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:29,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:41:29,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112596680] [2020-10-27 01:41:29,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:41:29,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:29,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:41:29,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:41:29,127 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 17 states. [2020-10-27 01:41:29,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:29,760 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-27 01:41:29,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:41:29,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-27 01:41:29,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:29,763 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:41:29,763 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 01:41:29,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:41:29,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 01:41:29,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-27 01:41:29,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:41:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-27 01:41:29,782 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2020-10-27 01:41:29,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:29,782 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-27 01:41:29,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:41:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-27 01:41:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:41:29,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:29,784 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:29,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:41:29,784 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:29,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:29,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1614550122, now seen corresponding path program 14 times [2020-10-27 01:41:29,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:29,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178986456] [2020-10-27 01:41:29,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:29,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:29,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:30,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:30,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:41:30,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:30,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-27 01:41:30,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:30,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:41:30,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:30,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:41:30,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:30,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:30,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:30,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:30,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:30,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:30,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:41:30,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:30,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:30,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:30,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:30,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:30,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178986456] [2020-10-27 01:41:30,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:30,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:41:30,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577918550] [2020-10-27 01:41:30,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:41:30,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:30,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:41:30,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:41:30,390 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 18 states. [2020-10-27 01:41:31,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:31,081 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-10-27 01:41:31,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:41:31,082 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-27 01:41:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:31,083 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:41:31,083 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 01:41:31,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:41:31,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 01:41:31,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-27 01:41:31,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:41:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-27 01:41:31,092 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2020-10-27 01:41:31,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:31,092 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-27 01:41:31,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:41:31,092 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-27 01:41:31,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:41:31,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:31,093 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:31,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:41:31,094 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:31,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:31,094 INFO L82 PathProgramCache]: Analyzing trace with hash 740300787, now seen corresponding path program 15 times [2020-10-27 01:41:31,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:31,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908303032] [2020-10-27 01:41:31,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:31,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:31,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:31,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:31,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:41:31,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:31,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-27 01:41:31,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:31,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:41:31,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:31,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:41:31,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:31,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:31,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:31,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:31,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:31,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:31,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:31,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:31,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:31,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:31,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:31,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:31,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908303032] [2020-10-27 01:41:31,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:31,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:41:31,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832339285] [2020-10-27 01:41:31,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:41:31,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:31,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:41:31,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:31,672 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 19 states. [2020-10-27 01:41:32,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:32,453 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-10-27 01:41:32,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:41:32,454 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-27 01:41:32,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:32,455 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:41:32,455 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 01:41:32,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:41:32,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 01:41:32,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-27 01:41:32,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:41:32,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-27 01:41:32,464 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2020-10-27 01:41:32,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:32,464 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-27 01:41:32,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:41:32,465 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-27 01:41:32,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:41:32,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:32,470 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:32,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:41:32,471 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:32,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:32,471 INFO L82 PathProgramCache]: Analyzing trace with hash 304259344, now seen corresponding path program 16 times [2020-10-27 01:41:32,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:32,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620807357] [2020-10-27 01:41:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:32,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:32,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:32,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:32,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:41:32,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:32,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-27 01:41:32,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:32,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:41:32,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:32,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:41:32,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:33,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:33,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:33,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:33,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:33,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:33,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:33,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:33,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:33,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:33,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:33,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:33,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620807357] [2020-10-27 01:41:33,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:33,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:41:33,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46594226] [2020-10-27 01:41:33,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:41:33,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:33,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:41:33,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:41:33,144 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 20 states. [2020-10-27 01:41:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:33,971 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2020-10-27 01:41:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:41:33,972 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-27 01:41:33,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:33,973 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:41:33,973 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 01:41:33,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:41:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 01:41:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-27 01:41:33,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:41:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-27 01:41:33,985 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2020-10-27 01:41:33,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:33,986 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-27 01:41:33,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:41:33,986 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-27 01:41:33,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:41:33,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:33,990 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:33,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:41:33,990 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:33,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:33,991 INFO L82 PathProgramCache]: Analyzing trace with hash -2119739667, now seen corresponding path program 17 times [2020-10-27 01:41:33,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:33,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136318337] [2020-10-27 01:41:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:34,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:34,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:34,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:34,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:41:34,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:34,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-27 01:41:34,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:34,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:41:34,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:34,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:41:34,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:34,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:34,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:34,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:34,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:34,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:34,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:34,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:34,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:34,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:34,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:34,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:34,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136318337] [2020-10-27 01:41:34,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:34,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:41:34,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3544920] [2020-10-27 01:41:34,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:41:34,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:34,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:41:34,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:41:34,618 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 21 states. [2020-10-27 01:41:35,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:35,562 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-10-27 01:41:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:41:35,562 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-10-27 01:41:35,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:35,563 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:41:35,563 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:41:35,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:41:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:41:35,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-27 01:41:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:41:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-27 01:41:35,581 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2020-10-27 01:41:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:35,581 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-27 01:41:35,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:41:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-27 01:41:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:41:35,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:35,582 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:35,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:41:35,587 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:35,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:35,588 INFO L82 PathProgramCache]: Analyzing trace with hash 584452490, now seen corresponding path program 18 times [2020-10-27 01:41:35,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:35,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059301376] [2020-10-27 01:41:35,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:35,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:35,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:35,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:35,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:41:35,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:35,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-27 01:41:35,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:35,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:41:35,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:35,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:41:35,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:36,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:36,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:36,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:36,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:36,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:36,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:41:36,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:36,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:36,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:36,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:36,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:36,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059301376] [2020-10-27 01:41:36,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:36,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:41:36,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439883849] [2020-10-27 01:41:36,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:41:36,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:36,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:41:36,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:41:36,262 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 22 states. [2020-10-27 01:41:37,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:37,142 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-10-27 01:41:37,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:41:37,143 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-27 01:41:37,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:37,144 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:41:37,144 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 01:41:37,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:41:37,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 01:41:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-27 01:41:37,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:41:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-27 01:41:37,153 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2020-10-27 01:41:37,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:37,154 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-27 01:41:37,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:41:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-27 01:41:37,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:41:37,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:37,155 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:37,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:41:37,155 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:37,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:37,155 INFO L82 PathProgramCache]: Analyzing trace with hash 857901287, now seen corresponding path program 19 times [2020-10-27 01:41:37,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:37,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846511634] [2020-10-27 01:41:37,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:37,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:37,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:37,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:37,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:41:37,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:37,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 316 [2020-10-27 01:41:37,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:37,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:41:37,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:37,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:41:37,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:37,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:37,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:37,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:37,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:37,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:37,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:41:37,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:37,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:37,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:37,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:37,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:37,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846511634] [2020-10-27 01:41:37,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:37,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:41:37,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166763639] [2020-10-27 01:41:37,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:41:37,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:37,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:41:37,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:41:37,862 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 23 states. [2020-10-27 01:41:38,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:38,909 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-10-27 01:41:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:41:38,918 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-27 01:41:38,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:38,919 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:41:38,919 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 01:41:38,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:41:38,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 01:41:38,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-27 01:41:38,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 01:41:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-27 01:41:38,934 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 53 [2020-10-27 01:41:38,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:38,935 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-27 01:41:38,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:41:38,935 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-27 01:41:38,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:41:38,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:38,940 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:38,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:41:38,941 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:38,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:38,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1649190148, now seen corresponding path program 20 times [2020-10-27 01:41:38,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:38,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736825308] [2020-10-27 01:41:38,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:38,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:38,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:39,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:39,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:41:39,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:39,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-27 01:41:39,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:39,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:41:39,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:39,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:41:39,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:39,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:39,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:39,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:39,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:39,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:39,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:41:39,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:39,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:39,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:39,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:39,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:39,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736825308] [2020-10-27 01:41:39,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:39,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:41:39,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199357860] [2020-10-27 01:41:39,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:41:39,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:39,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:41:39,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:41:39,770 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 24 states. [2020-10-27 01:41:40,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:40,893 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-10-27 01:41:40,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:41:40,895 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-27 01:41:40,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:40,895 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:41:40,896 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 01:41:40,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:41:40,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 01:41:40,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-27 01:41:40,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:41:40,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-27 01:41:40,905 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2020-10-27 01:41:40,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:40,907 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-27 01:41:40,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:41:40,907 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-27 01:41:40,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:41:40,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:40,908 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:40,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:41:40,908 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:40,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:40,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1868574177, now seen corresponding path program 21 times [2020-10-27 01:41:40,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:40,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538936550] [2020-10-27 01:41:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:40,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:40,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:41,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:41,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:41:41,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:41,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-27 01:41:41,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:41,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:41:41,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:41,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:41:41,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:41,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:41,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:41,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:41,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:41,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:41,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:41,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:41,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:41,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:41,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:41,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:41,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538936550] [2020-10-27 01:41:41,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:41,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:41:41,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450764501] [2020-10-27 01:41:41,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:41:41,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:41,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:41:41,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:41:41,817 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 25 states. [2020-10-27 01:41:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:42,881 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-10-27 01:41:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:41:42,882 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-10-27 01:41:42,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:42,883 INFO L225 Difference]: With dead ends: 70 [2020-10-27 01:41:42,883 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 01:41:42,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:41:42,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 01:41:42,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-27 01:41:42,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 01:41:42,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-27 01:41:42,890 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2020-10-27 01:41:42,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:42,891 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-27 01:41:42,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:41:42,891 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-27 01:41:42,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:41:42,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:42,892 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:42,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:41:42,892 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:42,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:42,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2051738754, now seen corresponding path program 22 times [2020-10-27 01:41:42,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:42,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970461605] [2020-10-27 01:41:42,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:42,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:42,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:43,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:43,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:41:43,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:43,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 383 [2020-10-27 01:41:43,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:43,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:41:43,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:43,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 01:41:43,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:43,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:43,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:43,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:43,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:43,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:43,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:43,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:43,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:43,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:43,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:43,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:43,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970461605] [2020-10-27 01:41:43,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:43,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:41:43,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502882336] [2020-10-27 01:41:43,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:41:43,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:43,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:41:43,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:41:43,755 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 26 states. [2020-10-27 01:41:44,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:44,938 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-10-27 01:41:44,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:41:44,938 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-27 01:41:44,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:44,939 INFO L225 Difference]: With dead ends: 72 [2020-10-27 01:41:44,939 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 01:41:44,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:41:44,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 01:41:44,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-27 01:41:44,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:41:44,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-27 01:41:44,950 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 59 [2020-10-27 01:41:44,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:44,951 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-27 01:41:44,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:41:44,951 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-27 01:41:44,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:41:44,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:44,952 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:44,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:41:44,952 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:44,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1508820443, now seen corresponding path program 23 times [2020-10-27 01:41:44,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:44,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022368649] [2020-10-27 01:41:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:44,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:45,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:45,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:45,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 01:41:45,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:45,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-27 01:41:45,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:45,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:41:45,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:45,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:41:45,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:45,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:45,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:45,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:45,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:45,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:45,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:45,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:45,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:45,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:45,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:45,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:45,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022368649] [2020-10-27 01:41:45,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:45,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:41:45,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870294659] [2020-10-27 01:41:45,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:41:45,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:45,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:41:45,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:41:45,888 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 27 states. [2020-10-27 01:41:47,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:47,133 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-10-27 01:41:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:41:47,133 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-27 01:41:47,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:47,134 INFO L225 Difference]: With dead ends: 74 [2020-10-27 01:41:47,134 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 01:41:47,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:41:47,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 01:41:47,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-27 01:41:47,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 01:41:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-10-27 01:41:47,141 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 61 [2020-10-27 01:41:47,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:47,141 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-10-27 01:41:47,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:41:47,141 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-10-27 01:41:47,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 01:41:47,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:47,142 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:47,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:41:47,142 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:47,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:47,143 INFO L82 PathProgramCache]: Analyzing trace with hash 117273848, now seen corresponding path program 24 times [2020-10-27 01:41:47,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:47,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654124024] [2020-10-27 01:41:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:47,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:47,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:47,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:47,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:41:47,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:47,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-27 01:41:47,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:47,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:41:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:41:47,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:48,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:48,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:48,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:48,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:48,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:48,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:41:48,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:48,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:48,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:48,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:48,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:48,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654124024] [2020-10-27 01:41:48,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:48,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:41:48,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145359042] [2020-10-27 01:41:48,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:41:48,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:48,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:41:48,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:41:48,135 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 28 states. [2020-10-27 01:41:49,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:49,487 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2020-10-27 01:41:49,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:41:49,488 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-27 01:41:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:49,489 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:41:49,489 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 01:41:49,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:41:49,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 01:41:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-27 01:41:49,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 01:41:49,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-10-27 01:41:49,496 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2020-10-27 01:41:49,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:49,496 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-10-27 01:41:49,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:41:49,496 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-10-27 01:41:49,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 01:41:49,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:49,497 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:49,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:41:49,497 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:49,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:49,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1424174891, now seen corresponding path program 25 times [2020-10-27 01:41:49,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:49,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982752354] [2020-10-27 01:41:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:49,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:49,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:49,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:49,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:41:49,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:49,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-10-27 01:41:49,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:49,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:41:49,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:49,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 01:41:49,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:50,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:50,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:50,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:50,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:50,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:50,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:50,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:50,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:50,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:50,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:50,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:50,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982752354] [2020-10-27 01:41:50,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:50,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:41:50,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791987072] [2020-10-27 01:41:50,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:41:50,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:50,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:41:50,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:41:50,521 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 29 states. [2020-10-27 01:41:51,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:51,926 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2020-10-27 01:41:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:41:51,927 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2020-10-27 01:41:51,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:51,927 INFO L225 Difference]: With dead ends: 78 [2020-10-27 01:41:51,928 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 01:41:51,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:41:51,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 01:41:51,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-27 01:41:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 01:41:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-27 01:41:51,936 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 65 [2020-10-27 01:41:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:51,936 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-27 01:41:51,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:41:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-27 01:41:51,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:41:51,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:51,937 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:51,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:41:51,937 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:51,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:51,938 INFO L82 PathProgramCache]: Analyzing trace with hash -992695950, now seen corresponding path program 26 times [2020-10-27 01:41:51,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:51,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647978156] [2020-10-27 01:41:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:51,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:52,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:52,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:52,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:41:52,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:52,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 433 [2020-10-27 01:41:52,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:52,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:41:52,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:52,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 01:41:52,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:52,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:52,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:52,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:52,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:52,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:52,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:52,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:52,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:52,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:52,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:52,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:52,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647978156] [2020-10-27 01:41:52,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:52,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:41:52,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593104117] [2020-10-27 01:41:52,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:41:52,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:52,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:41:52,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:41:52,947 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 30 states. [2020-10-27 01:41:54,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:54,464 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2020-10-27 01:41:54,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:41:54,464 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-27 01:41:54,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:54,465 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:41:54,466 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 01:41:54,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:41:54,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 01:41:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-27 01:41:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 01:41:54,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-27 01:41:54,473 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2020-10-27 01:41:54,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:54,474 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-27 01:41:54,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:41:54,474 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-27 01:41:54,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 01:41:54,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:54,475 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:54,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:41:54,475 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:54,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:54,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1341705935, now seen corresponding path program 27 times [2020-10-27 01:41:54,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:54,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950129654] [2020-10-27 01:41:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:54,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:54,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:54,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:54,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:41:54,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:54,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 477 [2020-10-27 01:41:54,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:54,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:41:54,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:54,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 01:41:54,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:55,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:55,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:55,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:55,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:55,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:55,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:55,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:55,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:55,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:55,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:55,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:55,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950129654] [2020-10-27 01:41:55,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:55,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:41:55,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926729452] [2020-10-27 01:41:55,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:41:55,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:55,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:41:55,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:41:55,600 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 31 states. [2020-10-27 01:41:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:57,246 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-27 01:41:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:41:57,247 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2020-10-27 01:41:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:57,248 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:41:57,248 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 01:41:57,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:41:57,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 01:41:57,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-27 01:41:57,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:41:57,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-27 01:41:57,256 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2020-10-27 01:41:57,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:57,256 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-27 01:41:57,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:41:57,257 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-27 01:41:57,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 01:41:57,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:57,257 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:57,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:41:57,258 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:57,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:57,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1565978388, now seen corresponding path program 28 times [2020-10-27 01:41:57,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:57,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612791446] [2020-10-27 01:41:57,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:57,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:57,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:57,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:57,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 01:41:57,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:57,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-10-27 01:41:57,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:57,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:41:57,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:57,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:41:57,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:58,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:58,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:58,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:58,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:58,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:58,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:58,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:58,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:58,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:58,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:58,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:58,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612791446] [2020-10-27 01:41:58,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:58,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:41:58,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786616274] [2020-10-27 01:41:58,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:41:58,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:58,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:41:58,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:41:58,462 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 32 states. [2020-10-27 01:42:00,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:00,087 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2020-10-27 01:42:00,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:42:00,088 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-27 01:42:00,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:00,089 INFO L225 Difference]: With dead ends: 84 [2020-10-27 01:42:00,089 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:42:00,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:42:00,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:42:00,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-27 01:42:00,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:42:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-27 01:42:00,096 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 71 [2020-10-27 01:42:00,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:00,097 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-27 01:42:00,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:42:00,097 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-27 01:42:00,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 01:42:00,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:00,098 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:00,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:42:00,098 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:00,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:00,098 INFO L82 PathProgramCache]: Analyzing trace with hash 173096905, now seen corresponding path program 29 times [2020-10-27 01:42:00,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:00,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431897390] [2020-10-27 01:42:00,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:00,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:00,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:00,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:00,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 01:42:00,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:00,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 647 [2020-10-27 01:42:00,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:00,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:42:00,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:00,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:42:00,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:01,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:01,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:01,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:01,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:01,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:01,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:42:01,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:01,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:01,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:01,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:01,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:01,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431897390] [2020-10-27 01:42:01,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:01,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:42:01,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332035032] [2020-10-27 01:42:01,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:42:01,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:01,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:42:01,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:42:01,391 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 33 states. [2020-10-27 01:42:03,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:03,068 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2020-10-27 01:42:03,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:42:03,068 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2020-10-27 01:42:03,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:03,071 INFO L225 Difference]: With dead ends: 86 [2020-10-27 01:42:03,071 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 01:42:03,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:42:03,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 01:42:03,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-27 01:42:03,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 01:42:03,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-27 01:42:03,084 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 73 [2020-10-27 01:42:03,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:03,084 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-27 01:42:03,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:42:03,084 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-27 01:42:03,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 01:42:03,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:03,085 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:03,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:42:03,085 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:03,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:03,086 INFO L82 PathProgramCache]: Analyzing trace with hash 682175334, now seen corresponding path program 30 times [2020-10-27 01:42:03,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:03,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332651209] [2020-10-27 01:42:03,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:03,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:03,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:03,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:03,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 01:42:03,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:03,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 676 [2020-10-27 01:42:03,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:03,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:42:03,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:03,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 01:42:03,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:04,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:04,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:04,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:04,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:04,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:04,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:42:04,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:04,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:04,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:04,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:04,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:04,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332651209] [2020-10-27 01:42:04,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:04,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:42:04,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518564428] [2020-10-27 01:42:04,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:42:04,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:04,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:42:04,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:42:04,565 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 34 states. [2020-10-27 01:42:06,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:06,417 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2020-10-27 01:42:06,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:42:06,418 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-10-27 01:42:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:06,419 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:42:06,419 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 01:42:06,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:42:06,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 01:42:06,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-27 01:42:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 01:42:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-10-27 01:42:06,428 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2020-10-27 01:42:06,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:06,428 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-10-27 01:42:06,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:42:06,428 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-10-27 01:42:06,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 01:42:06,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:06,429 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:06,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:42:06,429 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:06,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:06,430 INFO L82 PathProgramCache]: Analyzing trace with hash 280273859, now seen corresponding path program 31 times [2020-10-27 01:42:06,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:06,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819846106] [2020-10-27 01:42:06,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:06,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:06,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:06,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:06,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 01:42:06,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:06,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-27 01:42:06,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:06,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:42:06,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:06,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 01:42:06,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:07,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:07,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:07,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:07,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:07,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:07,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:07,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:07,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:07,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:07,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:07,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:07,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819846106] [2020-10-27 01:42:07,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:07,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:42:07,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42107228] [2020-10-27 01:42:07,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:42:07,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:07,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:42:07,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:42:07,713 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 35 states. [2020-10-27 01:42:09,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:09,526 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2020-10-27 01:42:09,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:42:09,526 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2020-10-27 01:42:09,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:09,527 INFO L225 Difference]: With dead ends: 90 [2020-10-27 01:42:09,528 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 01:42:09,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:42:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 01:42:09,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-27 01:42:09,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 01:42:09,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-10-27 01:42:09,536 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 77 [2020-10-27 01:42:09,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:09,536 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-10-27 01:42:09,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:42:09,536 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-10-27 01:42:09,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 01:42:09,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:09,537 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:09,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:42:09,537 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:09,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:09,538 INFO L82 PathProgramCache]: Analyzing trace with hash 600013024, now seen corresponding path program 32 times [2020-10-27 01:42:09,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:09,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41895962] [2020-10-27 01:42:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:09,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:09,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:09,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:09,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 01:42:09,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:09,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-27 01:42:09,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:09,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:42:09,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:09,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 01:42:09,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:10,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:10,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:10,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:10,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:10,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:10,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:10,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:10,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:10,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:10,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:10,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:10,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41895962] [2020-10-27 01:42:10,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:10,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:42:10,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698836320] [2020-10-27 01:42:10,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:42:10,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:10,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:42:10,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:42:10,897 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 36 states. [2020-10-27 01:42:12,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:12,965 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2020-10-27 01:42:12,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:42:12,970 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 79 [2020-10-27 01:42:12,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:12,971 INFO L225 Difference]: With dead ends: 92 [2020-10-27 01:42:12,971 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 01:42:12,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:42:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 01:42:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-27 01:42:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 01:42:12,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-27 01:42:12,978 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 79 [2020-10-27 01:42:12,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:12,978 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-27 01:42:12,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:42:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-27 01:42:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 01:42:12,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:12,979 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:12,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:42:12,979 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:12,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:12,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1368294723, now seen corresponding path program 33 times [2020-10-27 01:42:12,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:12,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15977095] [2020-10-27 01:42:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:12,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:13,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:13,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:13,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 01:42:13,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:13,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-27 01:42:13,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:13,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:42:13,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:13,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 01:42:13,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:14,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:14,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:14,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:14,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:14,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:14,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:14,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:14,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:14,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:14,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:14,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:14,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15977095] [2020-10-27 01:42:14,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:14,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:42:14,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165852123] [2020-10-27 01:42:14,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:42:14,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:14,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:42:14,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:42:14,320 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 37 states. [2020-10-27 01:42:16,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:16,536 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2020-10-27 01:42:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:42:16,537 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 81 [2020-10-27 01:42:16,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:16,537 INFO L225 Difference]: With dead ends: 94 [2020-10-27 01:42:16,538 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 01:42:16,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 01:42:16,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 01:42:16,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-27 01:42:16,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 01:42:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-10-27 01:42:16,545 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2020-10-27 01:42:16,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:16,545 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-10-27 01:42:16,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:42:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-10-27 01:42:16,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 01:42:16,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:16,546 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:16,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:42:16,546 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:16,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:16,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1168537946, now seen corresponding path program 34 times [2020-10-27 01:42:16,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:16,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106970621] [2020-10-27 01:42:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:16,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:16,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:17,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:17,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 01:42:17,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:17,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 779 [2020-10-27 01:42:17,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:17,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:42:17,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:17,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 01:42:17,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:18,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:18,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:18,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:18,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:18,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:18,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:18,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:18,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:18,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:18,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:18,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:18,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106970621] [2020-10-27 01:42:18,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:18,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:42:18,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142882707] [2020-10-27 01:42:18,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:42:18,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:18,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:42:18,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:42:18,307 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 38 states. [2020-10-27 01:42:20,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:20,549 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2020-10-27 01:42:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:42:20,549 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2020-10-27 01:42:20,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:20,550 INFO L225 Difference]: With dead ends: 96 [2020-10-27 01:42:20,550 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 01:42:20,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:42:20,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 01:42:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-27 01:42:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 01:42:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-27 01:42:20,558 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 83 [2020-10-27 01:42:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:20,558 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-27 01:42:20,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:42:20,558 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-27 01:42:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 01:42:20,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:20,559 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:20,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:42:20,560 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:20,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:20,560 INFO L82 PathProgramCache]: Analyzing trace with hash -476691273, now seen corresponding path program 35 times [2020-10-27 01:42:20,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:20,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192326387] [2020-10-27 01:42:20,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:20,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:20,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:21,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:21,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 01:42:21,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:21,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 647 [2020-10-27 01:42:21,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:21,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:42:21,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:21,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 01:42:21,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:22,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:22,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:22,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:22,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:22,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:22,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:42:22,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:22,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:22,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:22,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:22,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:22,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192326387] [2020-10-27 01:42:22,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:22,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:42:22,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381235566] [2020-10-27 01:42:22,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:42:22,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:22,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:42:22,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:42:22,242 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 39 states. [2020-10-27 01:42:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:24,601 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2020-10-27 01:42:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:42:24,602 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 85 [2020-10-27 01:42:24,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:24,603 INFO L225 Difference]: With dead ends: 98 [2020-10-27 01:42:24,603 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 01:42:24,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:42:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 01:42:24,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-27 01:42:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 01:42:24,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-10-27 01:42:24,611 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 85 [2020-10-27 01:42:24,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:24,611 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-10-27 01:42:24,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:42:24,611 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-10-27 01:42:24,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 01:42:24,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:24,612 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:24,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:42:24,612 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:24,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:24,613 INFO L82 PathProgramCache]: Analyzing trace with hash -994005804, now seen corresponding path program 36 times [2020-10-27 01:42:24,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:24,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717312578] [2020-10-27 01:42:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:24,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:24,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:25,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:25,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 01:42:25,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:25,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-10-27 01:42:25,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:25,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:42:25,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:25,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 01:42:25,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:26,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:26,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:26,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:26,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:26,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:26,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:42:26,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:26,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:26,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:26,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:26,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:26,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717312578] [2020-10-27 01:42:26,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:26,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:42:26,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028484318] [2020-10-27 01:42:26,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:42:26,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:26,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:42:26,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:42:26,165 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 40 states. [2020-10-27 01:42:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:28,624 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2020-10-27 01:42:28,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:42:28,624 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 87 [2020-10-27 01:42:28,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:28,625 INFO L225 Difference]: With dead ends: 100 [2020-10-27 01:42:28,625 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:42:28,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:42:28,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:42:28,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-27 01:42:28,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 01:42:28,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-10-27 01:42:28,634 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 87 [2020-10-27 01:42:28,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:28,634 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-10-27 01:42:28,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:42:28,634 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-10-27 01:42:28,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 01:42:28,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:28,635 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:28,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:42:28,635 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:28,636 INFO L82 PathProgramCache]: Analyzing trace with hash 82936241, now seen corresponding path program 37 times [2020-10-27 01:42:28,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:28,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729163945] [2020-10-27 01:42:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:28,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:28,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:29,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:29,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 01:42:29,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:29,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 793 [2020-10-27 01:42:29,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:29,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:42:29,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:29,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 01:42:29,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:30,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:30,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:30,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:30,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:30,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:30,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:30,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:30,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:30,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:30,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:30,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:30,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729163945] [2020-10-27 01:42:30,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:30,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:42:30,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539735468] [2020-10-27 01:42:30,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:42:30,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:30,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:42:30,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:42:30,613 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 41 states. [2020-10-27 01:42:33,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:33,046 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2020-10-27 01:42:33,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:42:33,047 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 89 [2020-10-27 01:42:33,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:33,048 INFO L225 Difference]: With dead ends: 102 [2020-10-27 01:42:33,048 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 01:42:33,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 01:42:33,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 01:42:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-27 01:42:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 01:42:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-10-27 01:42:33,056 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 89 [2020-10-27 01:42:33,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:33,056 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-10-27 01:42:33,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:42:33,057 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-10-27 01:42:33,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 01:42:33,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:33,057 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:33,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:42:33,058 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:33,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:33,058 INFO L82 PathProgramCache]: Analyzing trace with hash -62876850, now seen corresponding path program 38 times [2020-10-27 01:42:33,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:33,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840232978] [2020-10-27 01:42:33,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:33,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:33,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:33,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:33,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 01:42:33,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:33,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-10-27 01:42:33,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:33,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:42:33,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:33,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 01:42:33,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:34,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:34,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:34,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:34,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:34,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:34,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:34,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:34,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:34,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:34,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:34,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:34,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840232978] [2020-10-27 01:42:34,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:34,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:42:34,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142959628] [2020-10-27 01:42:34,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:42:34,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:34,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:42:34,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:42:34,873 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 42 states. [2020-10-27 01:42:37,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:37,495 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-10-27 01:42:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:42:37,496 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 91 [2020-10-27 01:42:37,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:37,497 INFO L225 Difference]: With dead ends: 104 [2020-10-27 01:42:37,497 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 01:42:37,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:42:37,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 01:42:37,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-27 01:42:37,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:42:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-10-27 01:42:37,505 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 91 [2020-10-27 01:42:37,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:37,506 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-10-27 01:42:37,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:42:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-10-27 01:42:37,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 01:42:37,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:37,507 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:37,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:42:37,507 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:37,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:37,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1544663467, now seen corresponding path program 39 times [2020-10-27 01:42:37,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:37,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537029875] [2020-10-27 01:42:37,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:37,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:37,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:38,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:38,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 01:42:38,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:38,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 500 [2020-10-27 01:42:38,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:38,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:42:38,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:38,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 01:42:38,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:39,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:39,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:39,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:39,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:39,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:39,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:39,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:39,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:39,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:39,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:42:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:39,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537029875] [2020-10-27 01:42:39,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:39,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:42:39,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436198187] [2020-10-27 01:42:39,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:42:39,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:39,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:42:39,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:42:39,226 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 43 states. [2020-10-27 01:42:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:41,896 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2020-10-27 01:42:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:42:41,897 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 93 [2020-10-27 01:42:41,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:41,898 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:42:41,898 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 01:42:41,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 01:42:41,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 01:42:41,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-27 01:42:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 01:42:41,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-10-27 01:42:41,906 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 93 [2020-10-27 01:42:41,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:41,907 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-10-27 01:42:41,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:42:41,907 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-10-27 01:42:41,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 01:42:41,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:41,908 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:41,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:42:41,908 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:41,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:41,908 INFO L82 PathProgramCache]: Analyzing trace with hash 202681544, now seen corresponding path program 40 times [2020-10-27 01:42:41,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:41,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992161590] [2020-10-27 01:42:41,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:41,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:42,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:42,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:42,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 01:42:42,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:42,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 602 [2020-10-27 01:42:42,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:42,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:42:42,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:42,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 01:42:42,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:43,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:43,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:43,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:43,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:43,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:43,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:43,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:43,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:43,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:43,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:43,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:43,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992161590] [2020-10-27 01:42:43,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:43,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:42:43,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570503522] [2020-10-27 01:42:43,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:42:43,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:43,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:42:43,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:42:43,871 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 44 states. [2020-10-27 01:42:46,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:46,586 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2020-10-27 01:42:46,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:42:46,587 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 95 [2020-10-27 01:42:46,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:46,588 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:42:46,588 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 01:42:46,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:42:46,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 01:42:46,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-27 01:42:46,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 01:42:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2020-10-27 01:42:46,597 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 95 [2020-10-27 01:42:46,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:46,597 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2020-10-27 01:42:46,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:42:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2020-10-27 01:42:46,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 01:42:46,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:46,598 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:46,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:42:46,599 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:46,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:46,599 INFO L82 PathProgramCache]: Analyzing trace with hash -951757659, now seen corresponding path program 41 times [2020-10-27 01:42:46,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:46,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859666117] [2020-10-27 01:42:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:46,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:46,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:47,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:47,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 01:42:47,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:47,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 538 [2020-10-27 01:42:47,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:47,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:42:47,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:47,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 01:42:47,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:48,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:48,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:48,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:48,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:48,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:48,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:42:48,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:48,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:48,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:48,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:48,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:48,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859666117] [2020-10-27 01:42:48,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:48,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:42:48,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114055216] [2020-10-27 01:42:48,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:42:48,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:48,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:42:48,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:42:48,525 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 45 states. [2020-10-27 01:42:51,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:51,393 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2020-10-27 01:42:51,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:42:51,393 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 97 [2020-10-27 01:42:51,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:51,395 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:42:51,395 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 01:42:51,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 01:42:51,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 01:42:51,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-27 01:42:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 01:42:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-10-27 01:42:51,402 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 97 [2020-10-27 01:42:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:51,403 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-10-27 01:42:51,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:42:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-10-27 01:42:51,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 01:42:51,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:51,403 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:51,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:42:51,404 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:51,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:51,404 INFO L82 PathProgramCache]: Analyzing trace with hash 2028697922, now seen corresponding path program 42 times [2020-10-27 01:42:51,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:51,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686915511] [2020-10-27 01:42:51,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:51,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:51,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:51,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:51,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 01:42:51,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:51,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 567 [2020-10-27 01:42:51,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:51,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:42:51,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:51,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 01:42:51,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:53,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:53,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:53,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:53,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:53,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:53,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:42:53,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:53,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:53,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:53,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:53,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:53,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686915511] [2020-10-27 01:42:53,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:53,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:42:53,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624764163] [2020-10-27 01:42:53,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:42:53,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:53,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:42:53,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:42:53,416 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 46 states. [2020-10-27 01:42:56,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:56,394 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2020-10-27 01:42:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:42:56,395 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 99 [2020-10-27 01:42:56,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:56,396 INFO L225 Difference]: With dead ends: 112 [2020-10-27 01:42:56,397 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 01:42:56,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:42:56,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 01:42:56,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-27 01:42:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:42:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-10-27 01:42:56,405 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2020-10-27 01:42:56,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:56,406 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-10-27 01:42:56,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:42:56,406 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-10-27 01:42:56,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 01:42:56,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:56,407 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:56,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:42:56,407 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:56,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:56,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1503324831, now seen corresponding path program 43 times [2020-10-27 01:42:56,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:56,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537450157] [2020-10-27 01:42:56,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:56,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:56,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:57,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:57,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 01:42:57,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:42:57,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-27 01:42:57,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:57,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:42:57,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:57,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 01:42:57,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:58,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:58,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:58,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:58,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:58,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:58,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:58,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:58,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:58,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:58,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:58,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:58,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537450157] [2020-10-27 01:42:58,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:58,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 01:42:58,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106933791] [2020-10-27 01:42:58,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 01:42:58,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:58,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 01:42:58,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:42:58,552 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 47 states. [2020-10-27 01:43:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:01,739 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2020-10-27 01:43:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 01:43:01,739 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 101 [2020-10-27 01:43:01,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:01,741 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:43:01,741 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:43:01,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 01:43:01,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:43:01,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-27 01:43:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 01:43:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-10-27 01:43:01,749 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 101 [2020-10-27 01:43:01,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:01,750 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-10-27 01:43:01,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 01:43:01,750 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-10-27 01:43:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 01:43:01,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:01,751 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:01,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:43:01,751 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:01,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:01,751 INFO L82 PathProgramCache]: Analyzing trace with hash -869041988, now seen corresponding path program 44 times [2020-10-27 01:43:01,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:01,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856873386] [2020-10-27 01:43:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:01,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:02,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:02,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:02,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 01:43:02,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:43:02,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 621 [2020-10-27 01:43:02,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:02,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 01:43:02,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:02,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-27 01:43:02,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:03,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:03,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:03,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:03,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:03,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:03,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:43:03,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:03,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:03,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:03,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:03,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:03,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856873386] [2020-10-27 01:43:03,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:03,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 01:43:03,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934974212] [2020-10-27 01:43:03,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 01:43:03,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:03,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 01:43:03,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:43:03,959 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 48 states. [2020-10-27 01:43:07,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:07,340 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2020-10-27 01:43:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:43:07,340 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 103 [2020-10-27 01:43:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:07,342 INFO L225 Difference]: With dead ends: 116 [2020-10-27 01:43:07,342 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 01:43:07,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 01:43:07,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 01:43:07,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-27 01:43:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 01:43:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-10-27 01:43:07,354 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 103 [2020-10-27 01:43:07,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:07,355 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-10-27 01:43:07,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 01:43:07,355 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-10-27 01:43:07,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 01:43:07,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:07,356 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:07,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:43:07,356 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:07,356 INFO L82 PathProgramCache]: Analyzing trace with hash -85920871, now seen corresponding path program 45 times [2020-10-27 01:43:07,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:07,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962055386] [2020-10-27 01:43:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:07,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:07,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:08,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:08,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 01:43:08,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:43:08,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 658 [2020-10-27 01:43:08,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:08,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 01:43:08,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:08,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 01:43:08,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:09,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:09,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:09,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:09,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:09,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:09,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:43:09,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:09,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:09,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:09,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:09,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:09,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962055386] [2020-10-27 01:43:09,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:09,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 01:43:09,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056313517] [2020-10-27 01:43:09,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 01:43:09,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:09,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 01:43:09,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:43:09,675 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 49 states. [2020-10-27 01:43:13,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:13,037 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2020-10-27 01:43:13,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 01:43:13,038 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 105 [2020-10-27 01:43:13,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:13,040 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:43:13,040 INFO L226 Difference]: Without dead ends: 108 [2020-10-27 01:43:13,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 01:43:13,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-27 01:43:13,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-27 01:43:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 01:43:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-10-27 01:43:13,049 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 105 [2020-10-27 01:43:13,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:13,049 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-10-27 01:43:13,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 01:43:13,049 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-10-27 01:43:13,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 01:43:13,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:13,050 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:13,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:43:13,050 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:13,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:13,051 INFO L82 PathProgramCache]: Analyzing trace with hash 874195766, now seen corresponding path program 46 times [2020-10-27 01:43:13,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:13,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014997703] [2020-10-27 01:43:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:13,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:13,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:14,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:14,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 01:43:14,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:43:14,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1158 [2020-10-27 01:43:14,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:14,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 01:43:14,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:14,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 01:43:14,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:15,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:15,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:15,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:15,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:15,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:15,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:15,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:15,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:15,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:15,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:15,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:15,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014997703] [2020-10-27 01:43:15,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:15,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 01:43:15,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466926064] [2020-10-27 01:43:15,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 01:43:15,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:15,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 01:43:15,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:43:15,959 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 50 states. [2020-10-27 01:43:19,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:19,546 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2020-10-27 01:43:19,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 01:43:19,547 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2020-10-27 01:43:19,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:19,548 INFO L225 Difference]: With dead ends: 120 [2020-10-27 01:43:19,548 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 01:43:19,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 01:43:19,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 01:43:19,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-27 01:43:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 01:43:19,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2020-10-27 01:43:19,557 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 107 [2020-10-27 01:43:19,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:19,557 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2020-10-27 01:43:19,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 01:43:19,557 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2020-10-27 01:43:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 01:43:19,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:19,558 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:19,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:43:19,559 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:19,559 INFO L82 PathProgramCache]: Analyzing trace with hash 128315283, now seen corresponding path program 47 times [2020-10-27 01:43:19,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:19,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732234142] [2020-10-27 01:43:19,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:19,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:19,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:20,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:20,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 01:43:20,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:43:20,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 987 [2020-10-27 01:43:20,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:20,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 01:43:20,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:20,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 01:43:20,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:22,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:22,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:22,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:22,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:22,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:22,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:43:22,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:22,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:22,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:22,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:22,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:22,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732234142] [2020-10-27 01:43:22,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:22,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 01:43:22,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809702918] [2020-10-27 01:43:22,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 01:43:22,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:22,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 01:43:22,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:43:22,439 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 51 states. [2020-10-27 01:43:26,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:26,308 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2020-10-27 01:43:26,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 01:43:26,309 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 109 [2020-10-27 01:43:26,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:26,310 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:43:26,310 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 01:43:26,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 01:43:26,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 01:43:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-27 01:43:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 01:43:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-10-27 01:43:26,319 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 109 [2020-10-27 01:43:26,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:26,319 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-10-27 01:43:26,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 01:43:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-10-27 01:43:26,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 01:43:26,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:26,320 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:26,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:43:26,321 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:26,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:26,321 INFO L82 PathProgramCache]: Analyzing trace with hash 596709552, now seen corresponding path program 48 times [2020-10-27 01:43:26,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:26,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461607229] [2020-10-27 01:43:26,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:26,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:26,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:27,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:27,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 01:43:27,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:43:27,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 876 [2020-10-27 01:43:27,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:27,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 01:43:27,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:27,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 01:43:27,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:29,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:29,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:29,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:29,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:29,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:29,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:29,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:29,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:29,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:29,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:29,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:29,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:29,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461607229] [2020-10-27 01:43:29,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:29,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 01:43:29,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082101673] [2020-10-27 01:43:29,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 01:43:29,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:29,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 01:43:29,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 01:43:29,154 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 52 states. [2020-10-27 01:43:33,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:33,056 INFO L93 Difference]: Finished difference Result 124 states and 127 transitions. [2020-10-27 01:43:33,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 01:43:33,057 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 111 [2020-10-27 01:43:33,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:33,059 INFO L225 Difference]: With dead ends: 124 [2020-10-27 01:43:33,059 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 01:43:33,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 01:43:33,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 01:43:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-27 01:43:33,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 01:43:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-10-27 01:43:33,066 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2020-10-27 01:43:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:33,066 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-10-27 01:43:33,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 01:43:33,066 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-10-27 01:43:33,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 01:43:33,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:33,067 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:33,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:43:33,068 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:33,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:33,068 INFO L82 PathProgramCache]: Analyzing trace with hash -247964019, now seen corresponding path program 49 times [2020-10-27 01:43:33,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:33,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711450251] [2020-10-27 01:43:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:33,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:33,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:34,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 01:43:34,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:43:34,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 980 [2020-10-27 01:43:34,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:34,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 01:43:34,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:34,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 01:43:34,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:36,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:36,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:36,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:36,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:36,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:36,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:36,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:36,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:36,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:36,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:36,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:36,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711450251] [2020-10-27 01:43:36,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:36,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 01:43:36,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506987754] [2020-10-27 01:43:36,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 01:43:36,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:36,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 01:43:36,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:43:36,059 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 53 states. [2020-10-27 01:43:40,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:40,140 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2020-10-27 01:43:40,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 01:43:40,140 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 113 [2020-10-27 01:43:40,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:40,142 INFO L225 Difference]: With dead ends: 126 [2020-10-27 01:43:40,142 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 01:43:40,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 01:43:40,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 01:43:40,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-27 01:43:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 01:43:40,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2020-10-27 01:43:40,152 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 113 [2020-10-27 01:43:40,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:40,153 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2020-10-27 01:43:40,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 01:43:40,153 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2020-10-27 01:43:40,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 01:43:40,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:40,154 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:40,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:43:40,154 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:40,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:40,154 INFO L82 PathProgramCache]: Analyzing trace with hash -230446806, now seen corresponding path program 50 times [2020-10-27 01:43:40,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:40,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632003389] [2020-10-27 01:43:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:40,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:40,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:40,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 01:43:40,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:40,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-27 01:43:40,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:40,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:43:40,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:40,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:43:40,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:40,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:40,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:40,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:40,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:40,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:40,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:40,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:40,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:40,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:40,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:40,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 150 proven. 1 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:40,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632003389] [2020-10-27 01:43:40,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:40,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:43:40,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373099562] [2020-10-27 01:43:40,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:43:40,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:40,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:43:40,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:43:40,370 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 5 states. [2020-10-27 01:43:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:40,465 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2020-10-27 01:43:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:43:40,466 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2020-10-27 01:43:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:40,469 INFO L225 Difference]: With dead ends: 126 [2020-10-27 01:43:40,469 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 01:43:40,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:43:40,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 01:43:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-27 01:43:40,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 01:43:40,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-10-27 01:43:40,477 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2020-10-27 01:43:40,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:40,478 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-10-27 01:43:40,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:43:40,478 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-10-27 01:43:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 01:43:40,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:40,479 INFO L422 BasicCegarLoop]: trace histogram [52, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:40,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:43:40,479 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:40,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:40,480 INFO L82 PathProgramCache]: Analyzing trace with hash -969301307, now seen corresponding path program 51 times [2020-10-27 01:43:40,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:40,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730616092] [2020-10-27 01:43:40,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:40,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:40,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:40,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 01:43:40,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:40,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-27 01:43:40,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:40,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:43:40,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:40,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:43:40,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:40,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:40,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:40,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:40,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:40,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:40,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:40,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:40,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:40,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:40,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:40,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 250 proven. 4 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:40,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730616092] [2020-10-27 01:43:40,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:40,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:43:40,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429361795] [2020-10-27 01:43:40,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:43:40,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:40,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:43:40,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:43:40,728 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 6 states. [2020-10-27 01:43:40,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:40,867 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2020-10-27 01:43:40,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:43:40,867 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2020-10-27 01:43:40,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:40,869 INFO L225 Difference]: With dead ends: 128 [2020-10-27 01:43:40,869 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 01:43:40,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:43:40,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 01:43:40,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-27 01:43:40,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 01:43:40,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2020-10-27 01:43:40,877 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 117 [2020-10-27 01:43:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:40,878 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2020-10-27 01:43:40,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:43:40,878 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2020-10-27 01:43:40,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 01:43:40,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:40,879 INFO L422 BasicCegarLoop]: trace histogram [53, 50, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:40,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:43:40,879 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:40,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:40,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1956094368, now seen corresponding path program 52 times [2020-10-27 01:43:40,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:40,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083831580] [2020-10-27 01:43:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:40,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:41,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:41,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 01:43:41,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:41,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-27 01:43:41,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:41,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:43:41,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:41,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:43:41,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:41,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:41,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:41,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:41,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:41,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:41,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:43:41,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:41,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:41,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:41,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:41,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 350 proven. 9 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:41,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083831580] [2020-10-27 01:43:41,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:41,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:43:41,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893275524] [2020-10-27 01:43:41,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:43:41,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:41,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:43:41,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:43:41,101 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand 7 states. [2020-10-27 01:43:41,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:41,281 INFO L93 Difference]: Finished difference Result 130 states and 135 transitions. [2020-10-27 01:43:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:43:41,282 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 119 [2020-10-27 01:43:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:41,284 INFO L225 Difference]: With dead ends: 130 [2020-10-27 01:43:41,284 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 01:43:41,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:43:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 01:43:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-27 01:43:41,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 01:43:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-10-27 01:43:41,301 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 119 [2020-10-27 01:43:41,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:41,302 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-10-27 01:43:41,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:43:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-10-27 01:43:41,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 01:43:41,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:41,303 INFO L422 BasicCegarLoop]: trace histogram [54, 50, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:41,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:43:41,303 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:41,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:41,303 INFO L82 PathProgramCache]: Analyzing trace with hash 57759163, now seen corresponding path program 53 times [2020-10-27 01:43:41,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:41,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487748103] [2020-10-27 01:43:41,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:41,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:41,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:41,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 01:43:41,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:41,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-27 01:43:41,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:41,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:43:41,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:41,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:43:41,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:41,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:41,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:41,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:41,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:41,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:41,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:41,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:41,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:41,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:41,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:41,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 450 proven. 16 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:41,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487748103] [2020-10-27 01:43:41,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:41,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:43:41,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39784082] [2020-10-27 01:43:41,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:43:41,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:41,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:43:41,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:43:41,596 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 8 states. [2020-10-27 01:43:41,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:41,837 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2020-10-27 01:43:41,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:43:41,837 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-10-27 01:43:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:41,839 INFO L225 Difference]: With dead ends: 132 [2020-10-27 01:43:41,839 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 01:43:41,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:43:41,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 01:43:41,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-27 01:43:41,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 01:43:41,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2020-10-27 01:43:41,848 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 121 [2020-10-27 01:43:41,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:41,848 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2020-10-27 01:43:41,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:43:41,848 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2020-10-27 01:43:41,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 01:43:41,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:41,849 INFO L422 BasicCegarLoop]: trace histogram [55, 50, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:41,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:43:41,850 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:41,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1118727958, now seen corresponding path program 54 times [2020-10-27 01:43:41,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:41,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255094272] [2020-10-27 01:43:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:41,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:42,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:42,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 01:43:42,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:42,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-27 01:43:42,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:42,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:43:42,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:42,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:43:42,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:42,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:42,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:42,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:42,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:42,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:42,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:42,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:42,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:42,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:42,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:42,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 550 proven. 25 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:42,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255094272] [2020-10-27 01:43:42,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:42,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:43:42,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041597413] [2020-10-27 01:43:42,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:43:42,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:42,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:43:42,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:43:42,244 INFO L87 Difference]: Start difference. First operand 124 states and 129 transitions. Second operand 9 states. [2020-10-27 01:43:42,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:42,486 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2020-10-27 01:43:42,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:43:42,487 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2020-10-27 01:43:42,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:42,488 INFO L225 Difference]: With dead ends: 134 [2020-10-27 01:43:42,488 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 01:43:42,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:43:42,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 01:43:42,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-27 01:43:42,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 01:43:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2020-10-27 01:43:42,495 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 123 [2020-10-27 01:43:42,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:42,495 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2020-10-27 01:43:42,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:43:42,495 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2020-10-27 01:43:42,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 01:43:42,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:42,496 INFO L422 BasicCegarLoop]: trace histogram [56, 50, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:42,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:43:42,496 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:42,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:42,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1492476495, now seen corresponding path program 55 times [2020-10-27 01:43:42,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:42,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973797125] [2020-10-27 01:43:42,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:42,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:42,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:42,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 01:43:42,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:42,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-27 01:43:42,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:42,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:43:42,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:42,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:43:42,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:42,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:42,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:42,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:42,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:42,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:42,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:42,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:42,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:42,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:42,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:42,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:42,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973797125] [2020-10-27 01:43:42,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:42,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:43:42,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054728572] [2020-10-27 01:43:42,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:43:42,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:42,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:43:42,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:43:42,945 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand 10 states. [2020-10-27 01:43:43,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:43,248 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2020-10-27 01:43:43,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:43:43,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 125 [2020-10-27 01:43:43,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:43,250 INFO L225 Difference]: With dead ends: 136 [2020-10-27 01:43:43,250 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 01:43:43,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:43:43,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 01:43:43,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-27 01:43:43,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 01:43:43,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2020-10-27 01:43:43,256 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 125 [2020-10-27 01:43:43,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:43,256 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2020-10-27 01:43:43,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:43:43,257 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2020-10-27 01:43:43,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 01:43:43,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:43,257 INFO L422 BasicCegarLoop]: trace histogram [57, 50, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:43,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:43:43,257 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:43,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:43,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1695912332, now seen corresponding path program 56 times [2020-10-27 01:43:43,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:43,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307551591] [2020-10-27 01:43:43,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:43,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:43,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:43,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 01:43:43,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:43,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-27 01:43:43,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:43,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:43:43,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:43,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:43:43,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:43,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:43,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:43,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:43,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:43,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:43,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:43,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:43,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:43,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:43,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:43,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 750 proven. 49 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:43,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307551591] [2020-10-27 01:43:43,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:43,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:43:43,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990869840] [2020-10-27 01:43:43,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:43:43,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:43,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:43:43,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:43:43,775 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand 11 states. [2020-10-27 01:43:44,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:44,133 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2020-10-27 01:43:44,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:43:44,134 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 127 [2020-10-27 01:43:44,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:44,136 INFO L225 Difference]: With dead ends: 138 [2020-10-27 01:43:44,136 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 01:43:44,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:43:44,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 01:43:44,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-27 01:43:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 01:43:44,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2020-10-27 01:43:44,142 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 127 [2020-10-27 01:43:44,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:44,143 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2020-10-27 01:43:44,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:43:44,143 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2020-10-27 01:43:44,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 01:43:44,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:44,143 INFO L422 BasicCegarLoop]: trace histogram [58, 50, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:44,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:43:44,144 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:44,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:44,144 INFO L82 PathProgramCache]: Analyzing trace with hash -869074265, now seen corresponding path program 57 times [2020-10-27 01:43:44,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:44,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082928741] [2020-10-27 01:43:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:44,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:44,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:44,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 01:43:44,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:44,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-27 01:43:44,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:44,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:43:44,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:44,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:43:44,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:44,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:44,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:44,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:44,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:44,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:44,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:44,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:44,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:44,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:44,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:44,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 850 proven. 64 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:44,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082928741] [2020-10-27 01:43:44,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:44,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:43:44,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973734631] [2020-10-27 01:43:44,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:43:44,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:44,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:43:44,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:43:44,542 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand 12 states. [2020-10-27 01:43:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:44,983 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-10-27 01:43:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:43:44,983 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 129 [2020-10-27 01:43:44,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:44,985 INFO L225 Difference]: With dead ends: 140 [2020-10-27 01:43:44,985 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 01:43:44,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:43:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 01:43:44,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-10-27 01:43:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 01:43:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2020-10-27 01:43:44,994 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 129 [2020-10-27 01:43:44,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:44,994 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2020-10-27 01:43:44,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:43:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2020-10-27 01:43:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-27 01:43:44,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:44,995 INFO L422 BasicCegarLoop]: trace histogram [59, 50, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:44,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 01:43:44,996 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:44,996 INFO L82 PathProgramCache]: Analyzing trace with hash -509966078, now seen corresponding path program 58 times [2020-10-27 01:43:44,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:44,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742466211] [2020-10-27 01:43:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:45,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:45,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:45,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 01:43:45,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:45,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-27 01:43:45,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:45,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:43:45,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:45,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:43:45,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:45,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:45,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:45,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:45,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:45,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:45,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:45,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:45,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:45,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:45,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:45,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 950 proven. 81 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:45,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742466211] [2020-10-27 01:43:45,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:45,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:43:45,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060910879] [2020-10-27 01:43:45,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:43:45,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:45,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:43:45,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:43:45,482 INFO L87 Difference]: Start difference. First operand 132 states and 141 transitions. Second operand 13 states. [2020-10-27 01:43:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:45,957 INFO L93 Difference]: Finished difference Result 142 states and 153 transitions. [2020-10-27 01:43:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:43:45,958 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 131 [2020-10-27 01:43:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:45,960 INFO L225 Difference]: With dead ends: 142 [2020-10-27 01:43:45,960 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 01:43:45,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:43:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 01:43:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-27 01:43:45,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-27 01:43:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 144 transitions. [2020-10-27 01:43:45,970 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 144 transitions. Word has length 131 [2020-10-27 01:43:45,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:45,970 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 144 transitions. [2020-10-27 01:43:45,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:43:45,970 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 144 transitions. [2020-10-27 01:43:45,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 01:43:45,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:45,971 INFO L422 BasicCegarLoop]: trace histogram [60, 50, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:45,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 01:43:45,971 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:45,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:45,972 INFO L82 PathProgramCache]: Analyzing trace with hash 995617949, now seen corresponding path program 59 times [2020-10-27 01:43:45,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:45,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124276723] [2020-10-27 01:43:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:46,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:46,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:46,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 01:43:46,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:46,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-10-27 01:43:46,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:46,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:43:46,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:46,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:43:46,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:46,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:46,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:46,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:46,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:46,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:46,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:46,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:46,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1050 proven. 100 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:46,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124276723] [2020-10-27 01:43:46,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:46,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:43:46,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140572536] [2020-10-27 01:43:46,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:43:46,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:46,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:43:46,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:43:46,639 INFO L87 Difference]: Start difference. First operand 134 states and 144 transitions. Second operand 14 states. [2020-10-27 01:43:47,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:47,206 INFO L93 Difference]: Finished difference Result 144 states and 156 transitions. [2020-10-27 01:43:47,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:43:47,207 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 133 [2020-10-27 01:43:47,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:47,208 INFO L225 Difference]: With dead ends: 144 [2020-10-27 01:43:47,208 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 01:43:47,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:43:47,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 01:43:47,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-27 01:43:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 01:43:47,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2020-10-27 01:43:47,219 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 133 [2020-10-27 01:43:47,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:47,220 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2020-10-27 01:43:47,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:43:47,220 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2020-10-27 01:43:47,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 01:43:47,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:47,221 INFO L422 BasicCegarLoop]: trace histogram [61, 50, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:47,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-27 01:43:47,221 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:47,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:47,221 INFO L82 PathProgramCache]: Analyzing trace with hash 457889144, now seen corresponding path program 60 times [2020-10-27 01:43:47,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:47,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424956101] [2020-10-27 01:43:47,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:47,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:47,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:47,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 01:43:47,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:47,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-27 01:43:47,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:47,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:43:47,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:47,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:43:47,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:47,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:47,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:47,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:47,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:47,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:47,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:47,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:47,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:47,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:47,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:47,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1150 proven. 121 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:47,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424956101] [2020-10-27 01:43:47,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:47,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:43:47,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820173036] [2020-10-27 01:43:47,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:43:47,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:47,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:43:47,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:43:47,790 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand 15 states. [2020-10-27 01:43:48,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:48,363 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2020-10-27 01:43:48,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:43:48,364 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-10-27 01:43:48,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:48,365 INFO L225 Difference]: With dead ends: 146 [2020-10-27 01:43:48,365 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 01:43:48,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:43:48,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 01:43:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-27 01:43:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 01:43:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 150 transitions. [2020-10-27 01:43:48,374 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 150 transitions. Word has length 135 [2020-10-27 01:43:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:48,374 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 150 transitions. [2020-10-27 01:43:48,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:43:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 150 transitions. [2020-10-27 01:43:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 01:43:48,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:48,375 INFO L422 BasicCegarLoop]: trace histogram [62, 50, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:48,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-27 01:43:48,376 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:48,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:48,376 INFO L82 PathProgramCache]: Analyzing trace with hash -903416941, now seen corresponding path program 61 times [2020-10-27 01:43:48,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:48,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069729217] [2020-10-27 01:43:48,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:48,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:48,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:48,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 01:43:48,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:48,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-27 01:43:48,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:48,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:43:48,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:48,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:43:48,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:48,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:48,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:48,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:48,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:48,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:48,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:48,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:48,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:48,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:48,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:48,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1250 proven. 144 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:48,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069729217] [2020-10-27 01:43:48,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:48,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:43:48,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939691769] [2020-10-27 01:43:48,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:43:48,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:48,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:43:48,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:43:48,942 INFO L87 Difference]: Start difference. First operand 138 states and 150 transitions. Second operand 16 states. [2020-10-27 01:43:49,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:49,598 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2020-10-27 01:43:49,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:43:49,599 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 137 [2020-10-27 01:43:49,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:49,601 INFO L225 Difference]: With dead ends: 148 [2020-10-27 01:43:49,601 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 01:43:49,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:43:49,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 01:43:49,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-10-27 01:43:49,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 01:43:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 153 transitions. [2020-10-27 01:43:49,609 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 153 transitions. Word has length 137 [2020-10-27 01:43:49,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:49,609 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 153 transitions. [2020-10-27 01:43:49,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:43:49,610 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 153 transitions. [2020-10-27 01:43:49,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 01:43:49,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:49,610 INFO L422 BasicCegarLoop]: trace histogram [63, 50, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:49,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-27 01:43:49,611 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:49,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:49,611 INFO L82 PathProgramCache]: Analyzing trace with hash 846460654, now seen corresponding path program 62 times [2020-10-27 01:43:49,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:49,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410146985] [2020-10-27 01:43:49,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:49,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:50,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:50,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 01:43:50,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:50,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 461 [2020-10-27 01:43:50,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:50,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:43:50,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:50,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:43:50,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:50,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:50,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:50,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:50,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:50,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:50,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:43:50,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:50,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:50,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:50,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:50,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 1350 proven. 169 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:50,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410146985] [2020-10-27 01:43:50,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:50,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:43:50,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797008520] [2020-10-27 01:43:50,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:43:50,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:50,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:43:50,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:43:50,346 INFO L87 Difference]: Start difference. First operand 140 states and 153 transitions. Second operand 17 states. [2020-10-27 01:43:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:51,094 INFO L93 Difference]: Finished difference Result 150 states and 165 transitions. [2020-10-27 01:43:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:43:51,095 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 139 [2020-10-27 01:43:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:51,096 INFO L225 Difference]: With dead ends: 150 [2020-10-27 01:43:51,096 INFO L226 Difference]: Without dead ends: 143 [2020-10-27 01:43:51,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:43:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-27 01:43:51,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-27 01:43:51,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 01:43:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2020-10-27 01:43:51,105 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 139 [2020-10-27 01:43:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:51,106 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2020-10-27 01:43:51,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:43:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2020-10-27 01:43:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 01:43:51,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:51,107 INFO L422 BasicCegarLoop]: trace histogram [64, 50, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:51,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-27 01:43:51,107 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:51,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:51,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1148350583, now seen corresponding path program 63 times [2020-10-27 01:43:51,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:51,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265092503] [2020-10-27 01:43:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:51,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:51,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:51,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 01:43:51,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:51,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-27 01:43:51,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:51,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:43:51,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:51,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:43:51,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:51,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:51,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:51,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:51,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:51,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:51,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:51,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:51,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:51,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:51,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:51,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 196 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:51,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265092503] [2020-10-27 01:43:51,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:51,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:43:51,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83943126] [2020-10-27 01:43:51,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:43:51,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:51,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:43:51,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:43:51,793 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand 18 states. [2020-10-27 01:43:52,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:52,591 INFO L93 Difference]: Finished difference Result 152 states and 168 transitions. [2020-10-27 01:43:52,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:43:52,591 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 141 [2020-10-27 01:43:52,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:52,593 INFO L225 Difference]: With dead ends: 152 [2020-10-27 01:43:52,593 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 01:43:52,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:43:52,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 01:43:52,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-10-27 01:43:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 01:43:52,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 159 transitions. [2020-10-27 01:43:52,602 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 159 transitions. Word has length 141 [2020-10-27 01:43:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:52,603 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 159 transitions. [2020-10-27 01:43:52,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:43:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 159 transitions. [2020-10-27 01:43:52,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-27 01:43:52,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:52,604 INFO L422 BasicCegarLoop]: trace histogram [65, 50, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:52,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-27 01:43:52,604 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:52,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1688431972, now seen corresponding path program 64 times [2020-10-27 01:43:52,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:52,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175776762] [2020-10-27 01:43:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:52,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:53,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:53,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 01:43:53,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:53,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-27 01:43:53,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:53,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:43:53,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:53,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:43:53,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:53,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:53,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:53,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:53,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:53,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:53,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:43:53,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:53,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:53,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:53,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:53,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 1550 proven. 225 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:53,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175776762] [2020-10-27 01:43:53,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:53,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:43:53,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499583554] [2020-10-27 01:43:53,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:43:53,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:53,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:43:53,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:43:53,351 INFO L87 Difference]: Start difference. First operand 144 states and 159 transitions. Second operand 19 states. [2020-10-27 01:43:54,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:54,182 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2020-10-27 01:43:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:43:54,183 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 143 [2020-10-27 01:43:54,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:54,184 INFO L225 Difference]: With dead ends: 154 [2020-10-27 01:43:54,184 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 01:43:54,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:43:54,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 01:43:54,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-10-27 01:43:54,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 01:43:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 162 transitions. [2020-10-27 01:43:54,192 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 162 transitions. Word has length 143 [2020-10-27 01:43:54,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:54,192 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 162 transitions. [2020-10-27 01:43:54,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:43:54,192 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 162 transitions. [2020-10-27 01:43:54,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-27 01:43:54,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:54,193 INFO L422 BasicCegarLoop]: trace histogram [66, 50, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:54,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-27 01:43:54,194 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:54,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:54,194 INFO L82 PathProgramCache]: Analyzing trace with hash 532234367, now seen corresponding path program 65 times [2020-10-27 01:43:54,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:54,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498755505] [2020-10-27 01:43:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:54,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:54,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:54,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-27 01:43:54,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:54,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-27 01:43:54,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:54,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:43:54,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:54,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:43:54,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:54,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:54,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:54,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:54,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:54,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:54,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:43:54,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:54,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:54,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:54,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:54,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 1650 proven. 256 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:54,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498755505] [2020-10-27 01:43:54,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:54,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:43:54,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056074182] [2020-10-27 01:43:54,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:43:54,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:54,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:43:54,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:43:54,990 INFO L87 Difference]: Start difference. First operand 146 states and 162 transitions. Second operand 20 states. [2020-10-27 01:43:55,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:55,940 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2020-10-27 01:43:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:43:55,941 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 145 [2020-10-27 01:43:55,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:55,942 INFO L225 Difference]: With dead ends: 156 [2020-10-27 01:43:55,943 INFO L226 Difference]: Without dead ends: 149 [2020-10-27 01:43:55,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:43:55,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-27 01:43:55,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-27 01:43:55,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-27 01:43:55,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 165 transitions. [2020-10-27 01:43:55,952 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 165 transitions. Word has length 145 [2020-10-27 01:43:55,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:55,953 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 165 transitions. [2020-10-27 01:43:55,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:43:55,953 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 165 transitions. [2020-10-27 01:43:55,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-27 01:43:55,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:55,954 INFO L422 BasicCegarLoop]: trace histogram [67, 50, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:55,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-27 01:43:55,954 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:55,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:55,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1822865626, now seen corresponding path program 66 times [2020-10-27 01:43:55,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:55,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995438867] [2020-10-27 01:43:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:55,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:56,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:56,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-27 01:43:56,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:56,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-27 01:43:56,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:56,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:43:56,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:56,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:43:56,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:56,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:56,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:56,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:56,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:56,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:56,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:56,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:56,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:56,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:56,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:56,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 1750 proven. 289 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:56,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995438867] [2020-10-27 01:43:56,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:56,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:43:56,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812701623] [2020-10-27 01:43:56,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:43:56,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:56,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:43:56,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:43:56,873 INFO L87 Difference]: Start difference. First operand 148 states and 165 transitions. Second operand 21 states. [2020-10-27 01:43:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:57,869 INFO L93 Difference]: Finished difference Result 158 states and 177 transitions. [2020-10-27 01:43:57,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:43:57,870 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 147 [2020-10-27 01:43:57,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:57,872 INFO L225 Difference]: With dead ends: 158 [2020-10-27 01:43:57,872 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 01:43:57,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:43:57,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 01:43:57,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2020-10-27 01:43:57,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-27 01:43:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 168 transitions. [2020-10-27 01:43:57,881 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 168 transitions. Word has length 147 [2020-10-27 01:43:57,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:57,881 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 168 transitions. [2020-10-27 01:43:57,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:43:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 168 transitions. [2020-10-27 01:43:57,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-27 01:43:57,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:57,882 INFO L422 BasicCegarLoop]: trace histogram [68, 50, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:57,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-27 01:43:57,882 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:57,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:57,883 INFO L82 PathProgramCache]: Analyzing trace with hash 873956981, now seen corresponding path program 67 times [2020-10-27 01:43:57,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:57,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092993164] [2020-10-27 01:43:57,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:57,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:58,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:58,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-27 01:43:58,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:58,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-27 01:43:58,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:58,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:43:58,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:43:58,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:43:58,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:58,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:58,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:58,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:58,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:58,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:58,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:58,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:58,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:58,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:58,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:58,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 1850 proven. 324 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:43:58,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092993164] [2020-10-27 01:43:58,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:58,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:43:58,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188413780] [2020-10-27 01:43:58,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:43:58,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:58,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:43:58,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:43:58,839 INFO L87 Difference]: Start difference. First operand 150 states and 168 transitions. Second operand 22 states. [2020-10-27 01:43:59,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:59,904 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2020-10-27 01:43:59,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:43:59,904 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 149 [2020-10-27 01:43:59,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:59,906 INFO L225 Difference]: With dead ends: 160 [2020-10-27 01:43:59,906 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 01:43:59,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:43:59,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 01:43:59,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-10-27 01:43:59,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 01:43:59,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 171 transitions. [2020-10-27 01:43:59,914 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 171 transitions. Word has length 149 [2020-10-27 01:43:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:59,914 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 171 transitions. [2020-10-27 01:43:59,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:43:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 171 transitions. [2020-10-27 01:43:59,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 01:43:59,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:59,916 INFO L422 BasicCegarLoop]: trace histogram [69, 50, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:59,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-27 01:43:59,916 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:59,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:59,916 INFO L82 PathProgramCache]: Analyzing trace with hash -494184112, now seen corresponding path program 68 times [2020-10-27 01:43:59,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:59,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229181675] [2020-10-27 01:43:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:59,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:00,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:00,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 01:44:00,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:00,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 627 [2020-10-27 01:44:00,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:00,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:44:00,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:00,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:44:00,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:00,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:00,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:00,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:00,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:00,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:00,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:00,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:00,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:00,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:00,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:00,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 1950 proven. 361 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:44:00,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229181675] [2020-10-27 01:44:00,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:00,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:44:00,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814545132] [2020-10-27 01:44:00,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:44:00,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:00,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:44:00,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:44:00,974 INFO L87 Difference]: Start difference. First operand 152 states and 171 transitions. Second operand 23 states. [2020-10-27 01:44:02,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:02,120 INFO L93 Difference]: Finished difference Result 162 states and 183 transitions. [2020-10-27 01:44:02,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:44:02,121 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 151 [2020-10-27 01:44:02,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:02,123 INFO L225 Difference]: With dead ends: 162 [2020-10-27 01:44:02,123 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 01:44:02,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:44:02,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 01:44:02,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-10-27 01:44:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-27 01:44:02,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 174 transitions. [2020-10-27 01:44:02,132 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 174 transitions. Word has length 151 [2020-10-27 01:44:02,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:02,133 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 174 transitions. [2020-10-27 01:44:02,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:44:02,133 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 174 transitions. [2020-10-27 01:44:02,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 01:44:02,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:02,134 INFO L422 BasicCegarLoop]: trace histogram [70, 50, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:02,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-27 01:44:02,134 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:02,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:02,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1017781909, now seen corresponding path program 69 times [2020-10-27 01:44:02,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:02,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054895609] [2020-10-27 01:44:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:02,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:02,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:02,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 01:44:02,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:02,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 599 [2020-10-27 01:44:02,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:02,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:44:02,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:02,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:44:02,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:03,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:03,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:03,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:03,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:03,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:03,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:03,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:03,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:03,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:03,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:03,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2050 proven. 400 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:44:03,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054895609] [2020-10-27 01:44:03,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:03,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:44:03,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977491855] [2020-10-27 01:44:03,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:44:03,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:03,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:44:03,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:44:03,222 INFO L87 Difference]: Start difference. First operand 154 states and 174 transitions. Second operand 24 states. [2020-10-27 01:44:04,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:04,416 INFO L93 Difference]: Finished difference Result 164 states and 186 transitions. [2020-10-27 01:44:04,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:44:04,417 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 153 [2020-10-27 01:44:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:04,418 INFO L225 Difference]: With dead ends: 164 [2020-10-27 01:44:04,419 INFO L226 Difference]: Without dead ends: 157 [2020-10-27 01:44:04,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:44:04,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-27 01:44:04,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-27 01:44:04,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-27 01:44:04,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 177 transitions. [2020-10-27 01:44:04,426 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 177 transitions. Word has length 153 [2020-10-27 01:44:04,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:04,426 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 177 transitions. [2020-10-27 01:44:04,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:44:04,426 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 177 transitions. [2020-10-27 01:44:04,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 01:44:04,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:04,427 INFO L422 BasicCegarLoop]: trace histogram [71, 50, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:04,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-27 01:44:04,427 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:04,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:04,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1684091194, now seen corresponding path program 70 times [2020-10-27 01:44:04,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:04,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326322459] [2020-10-27 01:44:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:04,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:05,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:05,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 01:44:05,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:05,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-27 01:44:05,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:05,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:44:05,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:05,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:44:05,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:05,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:05,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:05,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:05,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:05,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:05,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:44:05,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:05,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:05,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:05,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:05,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2150 proven. 441 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:44:05,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326322459] [2020-10-27 01:44:05,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:05,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:44:05,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438474510] [2020-10-27 01:44:05,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:44:05,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:05,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:44:05,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:44:05,593 INFO L87 Difference]: Start difference. First operand 156 states and 177 transitions. Second operand 25 states. [2020-10-27 01:44:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:06,903 INFO L93 Difference]: Finished difference Result 166 states and 189 transitions. [2020-10-27 01:44:06,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:44:06,904 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 155 [2020-10-27 01:44:06,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:06,908 INFO L225 Difference]: With dead ends: 166 [2020-10-27 01:44:06,908 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 01:44:06,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:44:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 01:44:06,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-10-27 01:44:06,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 01:44:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2020-10-27 01:44:06,919 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 155 [2020-10-27 01:44:06,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:06,919 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2020-10-27 01:44:06,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:44:06,919 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2020-10-27 01:44:06,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-27 01:44:06,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:06,920 INFO L422 BasicCegarLoop]: trace histogram [72, 50, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:06,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-27 01:44:06,921 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:06,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:06,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2057186975, now seen corresponding path program 71 times [2020-10-27 01:44:06,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:06,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990919736] [2020-10-27 01:44:06,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:06,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:07,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:07,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 01:44:07,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:07,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-10-27 01:44:07,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:07,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:44:07,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:07,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:44:07,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:08,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:08,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:08,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:08,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:08,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:08,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:44:08,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:08,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:08,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:08,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:08,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2250 proven. 484 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:44:08,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990919736] [2020-10-27 01:44:08,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:08,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:44:08,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284870820] [2020-10-27 01:44:08,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:44:08,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:08,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:44:08,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:44:08,124 INFO L87 Difference]: Start difference. First operand 158 states and 180 transitions. Second operand 26 states. [2020-10-27 01:44:09,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:09,520 INFO L93 Difference]: Finished difference Result 168 states and 192 transitions. [2020-10-27 01:44:09,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:44:09,521 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 157 [2020-10-27 01:44:09,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:09,523 INFO L225 Difference]: With dead ends: 168 [2020-10-27 01:44:09,523 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 01:44:09,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:44:09,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 01:44:09,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-27 01:44:09,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-27 01:44:09,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 183 transitions. [2020-10-27 01:44:09,532 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 183 transitions. Word has length 157 [2020-10-27 01:44:09,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:09,533 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 183 transitions. [2020-10-27 01:44:09,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:44:09,533 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 183 transitions. [2020-10-27 01:44:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 01:44:09,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:09,534 INFO L422 BasicCegarLoop]: trace histogram [73, 50, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:09,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-27 01:44:09,534 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:09,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:09,535 INFO L82 PathProgramCache]: Analyzing trace with hash 175020348, now seen corresponding path program 72 times [2020-10-27 01:44:09,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:09,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995323909] [2020-10-27 01:44:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:09,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:10,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:10,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 01:44:10,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:10,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 728 [2020-10-27 01:44:10,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:10,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:44:10,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:10,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:44:10,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:10,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:10,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:10,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:10,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:10,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:10,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:44:10,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:10,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:10,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:10,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:10,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2350 proven. 529 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:44:10,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995323909] [2020-10-27 01:44:10,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:10,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:44:10,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796274258] [2020-10-27 01:44:10,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:44:10,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:10,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:44:10,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:44:10,838 INFO L87 Difference]: Start difference. First operand 160 states and 183 transitions. Second operand 27 states. [2020-10-27 01:44:12,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:12,243 INFO L93 Difference]: Finished difference Result 170 states and 195 transitions. [2020-10-27 01:44:12,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:44:12,244 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 159 [2020-10-27 01:44:12,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:12,246 INFO L225 Difference]: With dead ends: 170 [2020-10-27 01:44:12,246 INFO L226 Difference]: Without dead ends: 163 [2020-10-27 01:44:12,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:44:12,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-27 01:44:12,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-10-27 01:44:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 01:44:12,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 186 transitions. [2020-10-27 01:44:12,256 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 186 transitions. Word has length 159 [2020-10-27 01:44:12,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:12,256 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 186 transitions. [2020-10-27 01:44:12,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:44:12,256 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 186 transitions. [2020-10-27 01:44:12,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 01:44:12,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:12,257 INFO L422 BasicCegarLoop]: trace histogram [74, 50, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:12,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-27 01:44:12,258 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:12,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:12,258 INFO L82 PathProgramCache]: Analyzing trace with hash 2137577047, now seen corresponding path program 73 times [2020-10-27 01:44:12,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:12,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183301683] [2020-10-27 01:44:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:12,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:13,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:13,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-27 01:44:13,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:13,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 778 [2020-10-27 01:44:13,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:13,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:44:13,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:13,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:44:13,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:13,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:13,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:13,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:13,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:13,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:13,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:44:13,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:13,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:13,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:13,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:13,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2450 proven. 576 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:44:13,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183301683] [2020-10-27 01:44:13,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:13,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:44:13,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930918001] [2020-10-27 01:44:13,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:44:13,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:13,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:44:13,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:44:13,688 INFO L87 Difference]: Start difference. First operand 162 states and 186 transitions. Second operand 28 states. [2020-10-27 01:44:15,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:15,243 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2020-10-27 01:44:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:44:15,243 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 161 [2020-10-27 01:44:15,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:15,245 INFO L225 Difference]: With dead ends: 172 [2020-10-27 01:44:15,245 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 01:44:15,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:44:15,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 01:44:15,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2020-10-27 01:44:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 01:44:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2020-10-27 01:44:15,255 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 161 [2020-10-27 01:44:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:15,256 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2020-10-27 01:44:15,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:44:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2020-10-27 01:44:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-27 01:44:15,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:15,257 INFO L422 BasicCegarLoop]: trace histogram [75, 50, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:15,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-27 01:44:15,257 INFO L429 AbstractCegarLoop]: === Iteration 77 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:15,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:15,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1631045454, now seen corresponding path program 74 times [2020-10-27 01:44:15,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:15,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933819595] [2020-10-27 01:44:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:15,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:16,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:16,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 01:44:16,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:16,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 926 [2020-10-27 01:44:16,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:16,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:44:16,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:16,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 01:44:16,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:16,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:16,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:16,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:16,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:16,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:16,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:16,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:16,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:16,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:16,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:16,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2550 proven. 625 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:44:16,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933819595] [2020-10-27 01:44:16,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:16,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:44:16,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700912349] [2020-10-27 01:44:16,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:44:16,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:16,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:44:16,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:44:16,839 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand 29 states. [2020-10-27 01:44:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:18,493 INFO L93 Difference]: Finished difference Result 174 states and 201 transitions. [2020-10-27 01:44:18,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:44:18,494 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 163 [2020-10-27 01:44:18,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:18,495 INFO L225 Difference]: With dead ends: 174 [2020-10-27 01:44:18,495 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 01:44:18,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:44:18,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 01:44:18,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-27 01:44:18,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-27 01:44:18,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 192 transitions. [2020-10-27 01:44:18,506 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 192 transitions. Word has length 163 [2020-10-27 01:44:18,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:18,507 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 192 transitions. [2020-10-27 01:44:18,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:44:18,507 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 192 transitions. [2020-10-27 01:44:18,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-27 01:44:18,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:18,508 INFO L422 BasicCegarLoop]: trace histogram [76, 50, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:18,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-27 01:44:18,508 INFO L429 AbstractCegarLoop]: === Iteration 78 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:18,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:18,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1675128909, now seen corresponding path program 75 times [2020-10-27 01:44:18,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:18,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995739354] [2020-10-27 01:44:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:18,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:19,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:19,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-27 01:44:19,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:19,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 860 [2020-10-27 01:44:19,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:19,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:44:19,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:19,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:44:19,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:20,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:20,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:20,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:20,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:20,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:20,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:44:20,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:20,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:20,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:20,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:20,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2650 proven. 676 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:44:20,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995739354] [2020-10-27 01:44:20,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:20,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:44:20,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014342846] [2020-10-27 01:44:20,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:44:20,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:20,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:44:20,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:44:20,070 INFO L87 Difference]: Start difference. First operand 166 states and 192 transitions. Second operand 30 states. [2020-10-27 01:44:21,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:21,781 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2020-10-27 01:44:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:44:21,781 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 165 [2020-10-27 01:44:21,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:21,783 INFO L225 Difference]: With dead ends: 176 [2020-10-27 01:44:21,783 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 01:44:21,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:44:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 01:44:21,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2020-10-27 01:44:21,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-27 01:44:21,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 195 transitions. [2020-10-27 01:44:21,793 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 195 transitions. Word has length 165 [2020-10-27 01:44:21,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:21,793 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 195 transitions. [2020-10-27 01:44:21,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:44:21,794 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 195 transitions. [2020-10-27 01:44:21,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-27 01:44:21,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:21,795 INFO L422 BasicCegarLoop]: trace histogram [77, 50, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:21,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-27 01:44:21,795 INFO L429 AbstractCegarLoop]: === Iteration 79 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:21,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:21,795 INFO L82 PathProgramCache]: Analyzing trace with hash 632892712, now seen corresponding path program 76 times [2020-10-27 01:44:21,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:21,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827729106] [2020-10-27 01:44:21,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:21,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:22,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:22,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-27 01:44:22,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:22,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 895 [2020-10-27 01:44:22,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:22,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:44:22,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:22,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:44:22,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:23,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:23,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:23,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:23,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:23,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:23,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:23,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:23,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:23,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:23,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:23,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2750 proven. 729 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:44:23,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827729106] [2020-10-27 01:44:23,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:23,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:44:23,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157459740] [2020-10-27 01:44:23,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:44:23,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:23,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:44:23,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:44:23,439 INFO L87 Difference]: Start difference. First operand 168 states and 195 transitions. Second operand 31 states. [2020-10-27 01:44:25,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:25,223 INFO L93 Difference]: Finished difference Result 178 states and 207 transitions. [2020-10-27 01:44:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:44:25,224 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 167 [2020-10-27 01:44:25,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:25,225 INFO L225 Difference]: With dead ends: 178 [2020-10-27 01:44:25,226 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 01:44:25,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:44:25,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 01:44:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2020-10-27 01:44:25,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-27 01:44:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 198 transitions. [2020-10-27 01:44:25,233 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 198 transitions. Word has length 167 [2020-10-27 01:44:25,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:25,233 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 198 transitions. [2020-10-27 01:44:25,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:44:25,233 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 198 transitions. [2020-10-27 01:44:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-27 01:44:25,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:25,234 INFO L422 BasicCegarLoop]: trace histogram [78, 50, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:25,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-27 01:44:25,234 INFO L429 AbstractCegarLoop]: === Iteration 80 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:25,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:25,234 INFO L82 PathProgramCache]: Analyzing trace with hash -228712637, now seen corresponding path program 77 times [2020-10-27 01:44:25,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:25,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724168638] [2020-10-27 01:44:25,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:25,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:26,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:26,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 01:44:26,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:26,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-10-27 01:44:26,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:26,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:44:26,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:26,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:44:26,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:27,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:27,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:27,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:27,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:27,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:27,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 01:44:27,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:27,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:27,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:27,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:27,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 2850 proven. 784 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:44:27,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724168638] [2020-10-27 01:44:27,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:27,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:44:27,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344433974] [2020-10-27 01:44:27,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:44:27,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:27,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:44:27,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:44:27,039 INFO L87 Difference]: Start difference. First operand 170 states and 198 transitions. Second operand 32 states. [2020-10-27 01:44:28,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:28,918 INFO L93 Difference]: Finished difference Result 180 states and 210 transitions. [2020-10-27 01:44:28,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:44:28,919 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 169 [2020-10-27 01:44:28,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:28,921 INFO L225 Difference]: With dead ends: 180 [2020-10-27 01:44:28,921 INFO L226 Difference]: Without dead ends: 173 [2020-10-27 01:44:28,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:44:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-27 01:44:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2020-10-27 01:44:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-27 01:44:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 201 transitions. [2020-10-27 01:44:28,930 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 201 transitions. Word has length 169 [2020-10-27 01:44:28,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:28,930 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 201 transitions. [2020-10-27 01:44:28,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:44:28,931 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 201 transitions. [2020-10-27 01:44:28,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-27 01:44:28,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:28,932 INFO L422 BasicCegarLoop]: trace histogram [79, 50, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:28,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-27 01:44:28,932 INFO L429 AbstractCegarLoop]: === Iteration 81 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:28,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:28,932 INFO L82 PathProgramCache]: Analyzing trace with hash 697235102, now seen corresponding path program 78 times [2020-10-27 01:44:28,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:28,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928566265] [2020-10-27 01:44:28,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:28,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:30,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:30,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-27 01:44:30,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:30,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1088 [2020-10-27 01:44:30,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:30,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:44:30,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:30,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 01:44:30,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:30,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:30,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:30,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:30,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:30,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:30,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:30,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:30,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:30,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:30,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:30,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 2950 proven. 841 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:44:30,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928566265] [2020-10-27 01:44:30,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:30,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:44:30,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316241813] [2020-10-27 01:44:30,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:44:30,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:30,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:44:30,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:44:30,874 INFO L87 Difference]: Start difference. First operand 172 states and 201 transitions. Second operand 33 states. [2020-10-27 01:44:32,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:32,843 INFO L93 Difference]: Finished difference Result 182 states and 213 transitions. [2020-10-27 01:44:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:44:32,844 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 171 [2020-10-27 01:44:32,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:32,845 INFO L225 Difference]: With dead ends: 182 [2020-10-27 01:44:32,845 INFO L226 Difference]: Without dead ends: 175 [2020-10-27 01:44:32,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:44:32,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-27 01:44:32,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2020-10-27 01:44:32,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-27 01:44:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 204 transitions. [2020-10-27 01:44:32,856 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 204 transitions. Word has length 171 [2020-10-27 01:44:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:32,856 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 204 transitions. [2020-10-27 01:44:32,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:44:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 204 transitions. [2020-10-27 01:44:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 01:44:32,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:32,857 INFO L422 BasicCegarLoop]: trace histogram [80, 50, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:32,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-27 01:44:32,857 INFO L429 AbstractCegarLoop]: === Iteration 82 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:32,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1474782009, now seen corresponding path program 79 times [2020-10-27 01:44:32,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:32,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502649974] [2020-10-27 01:44:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:32,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:33,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:33,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-27 01:44:33,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:33,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1089 [2020-10-27 01:44:33,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:33,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:44:33,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:33,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:44:33,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:34,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:34,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:34,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:34,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:34,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:34,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:44:34,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:34,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:34,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:34,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:34,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 3050 proven. 900 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:44:34,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502649974] [2020-10-27 01:44:34,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:34,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:44:34,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236891413] [2020-10-27 01:44:34,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:44:34,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:34,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:44:34,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:44:34,841 INFO L87 Difference]: Start difference. First operand 174 states and 204 transitions. Second operand 34 states. [2020-10-27 01:44:37,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:37,005 INFO L93 Difference]: Finished difference Result 184 states and 216 transitions. [2020-10-27 01:44:37,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:44:37,005 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 173 [2020-10-27 01:44:37,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:37,007 INFO L225 Difference]: With dead ends: 184 [2020-10-27 01:44:37,007 INFO L226 Difference]: Without dead ends: 177 [2020-10-27 01:44:37,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:44:37,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-27 01:44:37,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2020-10-27 01:44:37,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-27 01:44:37,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 207 transitions. [2020-10-27 01:44:37,017 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 207 transitions. Word has length 173 [2020-10-27 01:44:37,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:37,018 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 207 transitions. [2020-10-27 01:44:37,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:44:37,018 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 207 transitions. [2020-10-27 01:44:37,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-27 01:44:37,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:37,019 INFO L422 BasicCegarLoop]: trace histogram [81, 50, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:37,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-27 01:44:37,019 INFO L429 AbstractCegarLoop]: === Iteration 83 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:37,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:37,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1373050132, now seen corresponding path program 80 times [2020-10-27 01:44:37,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:37,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787741975] [2020-10-27 01:44:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:37,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:38,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:38,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-27 01:44:38,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:38,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1066 [2020-10-27 01:44:38,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:38,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:44:38,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:38,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 01:44:38,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:39,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:39,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:39,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:39,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:39,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:39,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:39,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:39,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:39,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:39,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:39,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 3150 proven. 961 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:44:39,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787741975] [2020-10-27 01:44:39,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:39,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:44:39,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728211846] [2020-10-27 01:44:39,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:44:39,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:39,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:44:39,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:44:39,039 INFO L87 Difference]: Start difference. First operand 176 states and 207 transitions. Second operand 35 states. [2020-10-27 01:44:41,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:41,174 INFO L93 Difference]: Finished difference Result 186 states and 219 transitions. [2020-10-27 01:44:41,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:44:41,175 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 175 [2020-10-27 01:44:41,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:41,176 INFO L225 Difference]: With dead ends: 186 [2020-10-27 01:44:41,176 INFO L226 Difference]: Without dead ends: 179 [2020-10-27 01:44:41,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:44:41,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-27 01:44:41,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2020-10-27 01:44:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-27 01:44:41,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 210 transitions. [2020-10-27 01:44:41,184 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 210 transitions. Word has length 175 [2020-10-27 01:44:41,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:41,184 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 210 transitions. [2020-10-27 01:44:41,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:44:41,184 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 210 transitions. [2020-10-27 01:44:41,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-27 01:44:41,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:41,185 INFO L422 BasicCegarLoop]: trace histogram [82, 50, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:41,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-27 01:44:41,185 INFO L429 AbstractCegarLoop]: === Iteration 84 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:41,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:41,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1902003153, now seen corresponding path program 81 times [2020-10-27 01:44:41,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:41,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882401134] [2020-10-27 01:44:41,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:41,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:42,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:42,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-27 01:44:42,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:42,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1109 [2020-10-27 01:44:42,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:42,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:44:42,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:42,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 01:44:42,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:43,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:43,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:43,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:43,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:43,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:43,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:44:43,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:43,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:43,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:43,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:43,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 3250 proven. 1024 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:44:43,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882401134] [2020-10-27 01:44:43,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:43,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:44:43,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018450787] [2020-10-27 01:44:43,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:44:43,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:43,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:44:43,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:44:43,293 INFO L87 Difference]: Start difference. First operand 178 states and 210 transitions. Second operand 36 states. [2020-10-27 01:44:45,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:45,571 INFO L93 Difference]: Finished difference Result 188 states and 222 transitions. [2020-10-27 01:44:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:44:45,571 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2020-10-27 01:44:45,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:45,573 INFO L225 Difference]: With dead ends: 188 [2020-10-27 01:44:45,573 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 01:44:45,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:44:45,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 01:44:45,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2020-10-27 01:44:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-27 01:44:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 213 transitions. [2020-10-27 01:44:45,580 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 213 transitions. Word has length 177 [2020-10-27 01:44:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:45,580 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 213 transitions. [2020-10-27 01:44:45,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:44:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 213 transitions. [2020-10-27 01:44:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-27 01:44:45,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:45,581 INFO L422 BasicCegarLoop]: trace histogram [83, 50, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:45,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-10-27 01:44:45,581 INFO L429 AbstractCegarLoop]: === Iteration 85 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:45,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1017182070, now seen corresponding path program 82 times [2020-10-27 01:44:45,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:45,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078170105] [2020-10-27 01:44:45,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:45,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:46,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:46,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-27 01:44:46,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:46,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1172 [2020-10-27 01:44:46,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:46,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:44:46,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:46,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 01:44:46,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:47,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:47,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:47,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:47,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:47,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:47,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:47,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:47,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:47,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:47,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:47,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 3350 proven. 1089 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:44:47,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078170105] [2020-10-27 01:44:47,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:47,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:44:47,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387143002] [2020-10-27 01:44:47,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:44:47,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:47,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:44:47,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:44:47,873 INFO L87 Difference]: Start difference. First operand 180 states and 213 transitions. Second operand 37 states. [2020-10-27 01:44:50,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:50,478 INFO L93 Difference]: Finished difference Result 190 states and 225 transitions. [2020-10-27 01:44:50,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:44:50,479 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 179 [2020-10-27 01:44:50,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:50,480 INFO L225 Difference]: With dead ends: 190 [2020-10-27 01:44:50,480 INFO L226 Difference]: Without dead ends: 183 [2020-10-27 01:44:50,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 01:44:50,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-27 01:44:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2020-10-27 01:44:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-27 01:44:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2020-10-27 01:44:50,489 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 179 [2020-10-27 01:44:50,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:50,490 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2020-10-27 01:44:50,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:44:50,490 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2020-10-27 01:44:50,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 01:44:50,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:50,491 INFO L422 BasicCegarLoop]: trace histogram [84, 50, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:50,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-10-27 01:44:50,491 INFO L429 AbstractCegarLoop]: === Iteration 86 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:50,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1107645915, now seen corresponding path program 83 times [2020-10-27 01:44:50,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:50,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759676220] [2020-10-27 01:44:50,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:50,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:51,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:51,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-27 01:44:51,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:51,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1335 [2020-10-27 01:44:51,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:51,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:44:51,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:51,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 01:44:51,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:52,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:52,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:52,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:52,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:52,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:52,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:52,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:52,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:52,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:52,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:52,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 3450 proven. 1156 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:44:53,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759676220] [2020-10-27 01:44:53,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:53,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:44:53,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073790263] [2020-10-27 01:44:53,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:44:53,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:53,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:44:53,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:44:53,002 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 38 states. [2020-10-27 01:44:55,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:55,696 INFO L93 Difference]: Finished difference Result 192 states and 228 transitions. [2020-10-27 01:44:55,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:44:55,697 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 181 [2020-10-27 01:44:55,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:55,699 INFO L225 Difference]: With dead ends: 192 [2020-10-27 01:44:55,699 INFO L226 Difference]: Without dead ends: 185 [2020-10-27 01:44:55,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:44:55,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-27 01:44:55,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-10-27 01:44:55,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-27 01:44:55,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 219 transitions. [2020-10-27 01:44:55,711 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 219 transitions. Word has length 181 [2020-10-27 01:44:55,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:55,711 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 219 transitions. [2020-10-27 01:44:55,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:44:55,711 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 219 transitions. [2020-10-27 01:44:55,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-27 01:44:55,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:55,712 INFO L422 BasicCegarLoop]: trace histogram [85, 50, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:55,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-10-27 01:44:55,713 INFO L429 AbstractCegarLoop]: === Iteration 87 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:55,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:55,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2144055040, now seen corresponding path program 84 times [2020-10-27 01:44:55,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:55,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505813541] [2020-10-27 01:44:55,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:55,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:57,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:57,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 01:44:57,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:57,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1307 [2020-10-27 01:44:57,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:57,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:44:57,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:44:57,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 01:44:57,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:58,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:58,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:58,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:58,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:58,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:58,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:58,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:58,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:58,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:58,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:58,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3550 proven. 1225 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 01:44:58,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505813541] [2020-10-27 01:44:58,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:58,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:44:58,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702354226] [2020-10-27 01:44:58,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:44:58,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:58,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:44:58,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:44:58,271 INFO L87 Difference]: Start difference. First operand 184 states and 219 transitions. Second operand 39 states. [2020-10-27 01:45:01,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:01,106 INFO L93 Difference]: Finished difference Result 194 states and 231 transitions. [2020-10-27 01:45:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:45:01,107 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 183 [2020-10-27 01:45:01,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:01,108 INFO L225 Difference]: With dead ends: 194 [2020-10-27 01:45:01,108 INFO L226 Difference]: Without dead ends: 187 [2020-10-27 01:45:01,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:45:01,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-27 01:45:01,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2020-10-27 01:45:01,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-27 01:45:01,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 222 transitions. [2020-10-27 01:45:01,119 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 222 transitions. Word has length 183 [2020-10-27 01:45:01,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:01,119 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 222 transitions. [2020-10-27 01:45:01,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:45:01,119 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 222 transitions. [2020-10-27 01:45:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-27 01:45:01,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:01,120 INFO L422 BasicCegarLoop]: trace histogram [86, 50, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:01,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-10-27 01:45:01,120 INFO L429 AbstractCegarLoop]: === Iteration 88 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:01,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:01,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1700811493, now seen corresponding path program 85 times [2020-10-27 01:45:01,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:01,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235973294] [2020-10-27 01:45:01,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:01,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:02,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:02,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-27 01:45:02,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:02,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1566 [2020-10-27 01:45:02,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:02,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:45:02,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 01:45:02,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 01:45:02,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0