/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:26:52,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:26:52,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:26:52,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:26:52,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:26:52,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:26:52,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:26:52,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:26:52,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:26:52,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:26:52,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:26:52,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:26:52,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:26:52,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:26:52,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:26:52,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:26:52,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:26:52,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:26:52,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:26:52,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:26:52,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:26:52,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:26:52,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:26:52,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:26:52,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:26:52,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:26:52,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:26:52,146 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:26:52,147 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:26:52,148 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:26:52,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:26:52,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:26:52,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:26:52,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:26:52,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:26:52,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:26:52,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:26:52,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:26:52,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:26:52,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:26:52,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:26:52,163 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:26:52,211 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:26:52,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:26:52,216 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:26:52,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:26:52,217 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:26:52,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:26:52,217 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:26:52,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:26:52,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:26:52,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:26:52,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:26:52,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:26:52,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:26:52,219 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:26:52,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:26:52,220 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:26:52,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:26:52,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:26:52,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:26:52,221 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:26:52,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:26:52,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:26:52,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:26:52,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:26:52,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:26:52,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:26:52,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:26:52,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:26:52,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:26:52,222 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:26:52,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:26:52,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:26:52,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:26:52,636 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:26:52,636 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:26:52,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2020-10-27 14:26:52,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa8a7cd0e/6d6b6354ded8458186ceff54d29ecc69/FLAGdd588f077 [2020-10-27 14:26:53,386 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:26:53,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2020-10-27 14:26:53,394 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa8a7cd0e/6d6b6354ded8458186ceff54d29ecc69/FLAGdd588f077 [2020-10-27 14:26:53,754 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa8a7cd0e/6d6b6354ded8458186ceff54d29ecc69 [2020-10-27 14:26:53,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:26:53,764 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:26:53,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:26:53,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:26:53,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:26:53,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:26:53" (1/1) ... [2020-10-27 14:26:53,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6de58159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:53, skipping insertion in model container [2020-10-27 14:26:53,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:26:53" (1/1) ... [2020-10-27 14:26:53,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:26:53,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:26:53,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:26:53,990 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:26:54,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:26:54,027 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:26:54,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:54 WrapperNode [2020-10-27 14:26:54,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:26:54,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:26:54,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:26:54,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:26:54,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:54" (1/1) ... [2020-10-27 14:26:54,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:54" (1/1) ... [2020-10-27 14:26:54,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:54" (1/1) ... [2020-10-27 14:26:54,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:54" (1/1) ... [2020-10-27 14:26:54,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:54" (1/1) ... [2020-10-27 14:26:54,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:54" (1/1) ... [2020-10-27 14:26:54,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:54" (1/1) ... [2020-10-27 14:26:54,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:26:54,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:26:54,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:26:54,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:26:54,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:26:54,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:26:54,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:26:54,143 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:26:54,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:26:54,144 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:26:54,144 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:26:54,144 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:26:54,145 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:26:54,145 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:26:54,145 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:26:54,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:26:54,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:26:54,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:26:54,146 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:26:54,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:26:54,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:26:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:26:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:26:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:26:54,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:26:54,431 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:26:54,432 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:26:54,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:26:54 BoogieIcfgContainer [2020-10-27 14:26:54,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:26:54,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:26:54,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:26:54,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:26:54,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:26:53" (1/3) ... [2020-10-27 14:26:54,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@698c73c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:26:54, skipping insertion in model container [2020-10-27 14:26:54,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:26:54" (2/3) ... [2020-10-27 14:26:54,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@698c73c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:26:54, skipping insertion in model container [2020-10-27 14:26:54,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:26:54" (3/3) ... [2020-10-27 14:26:54,444 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_maxInArray_ground.i [2020-10-27 14:26:54,459 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:26:54,465 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:26:54,484 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:26:54,519 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:26:54,520 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:26:54,520 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:26:54,520 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:26:54,520 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:26:54,520 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:26:54,521 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:26:54,521 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:26:54,577 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-27 14:26:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:26:54,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:54,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:54,595 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:54,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:54,613 INFO L82 PathProgramCache]: Analyzing trace with hash -368075238, now seen corresponding path program 1 times [2020-10-27 14:26:54,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:54,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658475153] [2020-10-27 14:26:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:54,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:54,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:55,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:26:55,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:26:55,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-27 14:26:55,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:55,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:55,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:26:55,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:55,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 14:26:55,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:55,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:55,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:55,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:55,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 14:26:55,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:55,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:55,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:55,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:26:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:26:55,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658475153] [2020-10-27 14:26:55,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:26:55,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:26:55,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130025717] [2020-10-27 14:26:55,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:26:55,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:55,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:26:55,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:26:55,379 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-27 14:26:55,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:55,492 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2020-10-27 14:26:55,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:26:55,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-27 14:26:55,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:55,502 INFO L225 Difference]: With dead ends: 55 [2020-10-27 14:26:55,502 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 14:26:55,506 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 14:26:55,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 14:26:55,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 14:26:55,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 14:26:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-27 14:26:55,547 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-27 14:26:55,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:55,548 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-27 14:26:55,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:26:55,548 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-27 14:26:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:26:55,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:55,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:55,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:26:55,550 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:55,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:55,551 INFO L82 PathProgramCache]: Analyzing trace with hash 230860937, now seen corresponding path program 1 times [2020-10-27 14:26:55,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:55,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007527575] [2020-10-27 14:26:55,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:55,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:55,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:26:55,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:26:55,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-27 14:26:55,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:55,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:26:55,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:26:55,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:26:55,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:55,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:55,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:55,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:55,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:55,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:26:55,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:55,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:55,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:55,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:55,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:26:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:26:55,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007527575] [2020-10-27 14:26:55,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:26:55,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:26:55,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422889407] [2020-10-27 14:26:55,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:26:55,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:55,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:26:55,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:26:55,852 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2020-10-27 14:26:55,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:55,928 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-10-27 14:26:55,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:26:55,928 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-27 14:26:55,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:55,930 INFO L225 Difference]: With dead ends: 41 [2020-10-27 14:26:55,930 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 14:26:55,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:26:55,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 14:26:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-27 14:26:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 14:26:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-27 14:26:55,941 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2020-10-27 14:26:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:55,941 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-27 14:26:55,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:26:55,941 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-27 14:26:55,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 14:26:55,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:55,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:55,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:26:55,943 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:55,944 INFO L82 PathProgramCache]: Analyzing trace with hash -139042905, now seen corresponding path program 1 times [2020-10-27 14:26:55,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:55,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347170167] [2020-10-27 14:26:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:55,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:55,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:56,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:56,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:56,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 14:26:56,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:26:56,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 970 [2020-10-27 14:26:56,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:56,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:26:56,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:26:56,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:26:56,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:26:57,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:57,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:57,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:57,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:57,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:57,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:26:57,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:57,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:57,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:57,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:57,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:26:57,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347170167] [2020-10-27 14:26:57,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:57,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:26:57,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779054133] [2020-10-27 14:26:57,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:26:57,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:57,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:26:57,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:26:57,076 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 9 states. [2020-10-27 14:26:57,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:57,357 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-27 14:26:57,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:26:57,358 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-27 14:26:57,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:57,361 INFO L225 Difference]: With dead ends: 49 [2020-10-27 14:26:57,361 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 14:26:57,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:26:57,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 14:26:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-10-27 14:26:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 14:26:57,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-27 14:26:57,376 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 20 [2020-10-27 14:26:57,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:57,376 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-27 14:26:57,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:26:57,377 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-27 14:26:57,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 14:26:57,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:57,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:57,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:26:57,378 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:57,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:57,379 INFO L82 PathProgramCache]: Analyzing trace with hash 562021673, now seen corresponding path program 1 times [2020-10-27 14:26:57,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:57,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584341482] [2020-10-27 14:26:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:57,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:57,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:57,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:57,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:57,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 14:26:57,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:26:57,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-27 14:26:57,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:57,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:26:57,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:26:57,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:26:57,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:57,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:57,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:57,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:57,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:57,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:57,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:26:57,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:57,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:57,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:57,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:57,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:26:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:26:57,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584341482] [2020-10-27 14:26:57,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:57,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:26:57,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398355475] [2020-10-27 14:26:57,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:26:57,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:57,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:26:57,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:26:57,909 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 10 states. [2020-10-27 14:26:58,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:58,200 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2020-10-27 14:26:58,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:26:58,201 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-27 14:26:58,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:58,204 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:26:58,205 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 14:26:58,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:26:58,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 14:26:58,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 37. [2020-10-27 14:26:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 14:26:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-27 14:26:58,216 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 20 [2020-10-27 14:26:58,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:58,216 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-27 14:26:58,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:26:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-27 14:26:58,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:26:58,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:58,218 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:58,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:26:58,218 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:58,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:58,219 INFO L82 PathProgramCache]: Analyzing trace with hash 941681609, now seen corresponding path program 2 times [2020-10-27 14:26:58,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:58,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561919006] [2020-10-27 14:26:58,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:58,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:58,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:58,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:59,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:59,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:26:59,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:26:59,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 822 [2020-10-27 14:26:59,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:59,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:26:59,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:26:59,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:26:59,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:59,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:26:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:59,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:59,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:26:59,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:26:59,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:26:59,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:26:59,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:26:59,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:26:59,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:26:59,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:26:59,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:26:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:26:59,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561919006] [2020-10-27 14:26:59,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:26:59,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:26:59,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868752296] [2020-10-27 14:26:59,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:26:59,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:26:59,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:26:59,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:26:59,211 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 11 states. [2020-10-27 14:26:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:26:59,572 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-10-27 14:26:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:26:59,573 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-27 14:26:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:26:59,574 INFO L225 Difference]: With dead ends: 69 [2020-10-27 14:26:59,575 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 14:26:59,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:26:59,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 14:26:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 40. [2020-10-27 14:26:59,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 14:26:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-27 14:26:59,585 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 23 [2020-10-27 14:26:59,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:26:59,586 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-27 14:26:59,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:26:59,586 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-27 14:26:59,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:26:59,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:26:59,587 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:26:59,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:26:59,587 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:26:59,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:26:59,588 INFO L82 PathProgramCache]: Analyzing trace with hash -69435641, now seen corresponding path program 1 times [2020-10-27 14:26:59,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:26:59,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010351037] [2020-10-27 14:26:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:26:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:26:59,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:59,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:26:59,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:00,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:00,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:27:00,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:00,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-10-27 14:27:00,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:00,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:27:00,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:00,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:27:00,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:00,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:00,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:00,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:00,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:00,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:00,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:27:00,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:00,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:00,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:00,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:00,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:27:00,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010351037] [2020-10-27 14:27:00,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:00,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:27:00,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85157983] [2020-10-27 14:27:00,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:27:00,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:00,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:27:00,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:27:00,403 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 12 states. [2020-10-27 14:27:00,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:00,839 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2020-10-27 14:27:00,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:27:00,840 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-27 14:27:00,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:00,841 INFO L225 Difference]: With dead ends: 68 [2020-10-27 14:27:00,841 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 14:27:00,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:27:00,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 14:27:00,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2020-10-27 14:27:00,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 14:27:00,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-27 14:27:00,850 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2020-10-27 14:27:00,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:00,850 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-27 14:27:00,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:27:00,850 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-27 14:27:00,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 14:27:00,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:00,851 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:00,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:27:00,852 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:00,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:00,852 INFO L82 PathProgramCache]: Analyzing trace with hash -533143039, now seen corresponding path program 1 times [2020-10-27 14:27:00,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:00,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743688606] [2020-10-27 14:27:00,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:00,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:00,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:00,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:00,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 14:27:00,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:27:00,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-27 14:27:00,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:00,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:27:00,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:00,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:27:00,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:00,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:01,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:01,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:01,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:01,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:27:01,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:01,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:01,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:01,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:01,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:01,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-27 14:27:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:01,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:01,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:01,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:01,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:01,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:01,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:01,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:01,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:01,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:27:01,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743688606] [2020-10-27 14:27:01,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:01,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:27:01,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849513353] [2020-10-27 14:27:01,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:27:01,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:01,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:27:01,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:27:01,019 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 5 states. [2020-10-27 14:27:01,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:01,090 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-27 14:27:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:27:01,091 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-27 14:27:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:01,092 INFO L225 Difference]: With dead ends: 56 [2020-10-27 14:27:01,092 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 14:27:01,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:27:01,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 14:27:01,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-27 14:27:01,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 14:27:01,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-27 14:27:01,099 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-10-27 14:27:01,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:01,099 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-27 14:27:01,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:27:01,100 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-27 14:27:01,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:27:01,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:01,101 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:01,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:27:01,101 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:01,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:01,102 INFO L82 PathProgramCache]: Analyzing trace with hash 879635491, now seen corresponding path program 2 times [2020-10-27 14:27:01,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:01,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829351330] [2020-10-27 14:27:01,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:01,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:01,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:27:01,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:01,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 547 [2020-10-27 14:27:01,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:01,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:27:01,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:01,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:27:01,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:01,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:01,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:01,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:01,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:01,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:27:01,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:01,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:01,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:01,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:01,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:01,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 14:27:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:01,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:01,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:01,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:01,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:01,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:01,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:01,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:01,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:01,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:01,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:27:01,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829351330] [2020-10-27 14:27:01,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:01,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:27:01,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938555449] [2020-10-27 14:27:01,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:27:01,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:01,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:27:01,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:27:01,728 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-10-27 14:27:01,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:01,809 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-27 14:27:01,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:27:01,810 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-27 14:27:01,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:01,811 INFO L225 Difference]: With dead ends: 59 [2020-10-27 14:27:01,811 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 14:27:01,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:27:01,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 14:27:01,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-27 14:27:01,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 14:27:01,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-27 14:27:01,818 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 31 [2020-10-27 14:27:01,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:01,819 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-27 14:27:01,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:27:01,819 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-27 14:27:01,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 14:27:01,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:01,820 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:01,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:27:01,820 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:01,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:01,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1714678079, now seen corresponding path program 3 times [2020-10-27 14:27:01,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:01,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156762813] [2020-10-27 14:27:01,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:01,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:01,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:03,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:03,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 14:27:03,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:03,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1295 [2020-10-27 14:27:03,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:03,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:27:03,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:03,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:27:03,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:03,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:03,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:03,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:03,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:03,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:03,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:03,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:03,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:03,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:03,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:03,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:03,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 14:27:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:03,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:03,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:03,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:03,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:03,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:03,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:03,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:03,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:03,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:03,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:27:03,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156762813] [2020-10-27 14:27:03,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:03,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:27:03,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902461177] [2020-10-27 14:27:03,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:27:03,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:03,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:27:03,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:27:03,218 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 7 states. [2020-10-27 14:27:03,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:03,317 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-27 14:27:03,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:27:03,318 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-27 14:27:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:03,319 INFO L225 Difference]: With dead ends: 62 [2020-10-27 14:27:03,319 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 14:27:03,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:27:03,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 14:27:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-27 14:27:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:27:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-27 14:27:03,331 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 34 [2020-10-27 14:27:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:03,331 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-27 14:27:03,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:27:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-27 14:27:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:27:03,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:03,333 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:03,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:27:03,333 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:03,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:03,334 INFO L82 PathProgramCache]: Analyzing trace with hash -973750429, now seen corresponding path program 4 times [2020-10-27 14:27:03,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:03,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815313893] [2020-10-27 14:27:03,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:03,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:03,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:03,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:05,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:05,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:27:05,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:05,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1801 [2020-10-27 14:27:05,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:05,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:27:05,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:05,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:27:05,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:05,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:05,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:05,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:05,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:05,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:05,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:27:05,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:05,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:05,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:05,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:05,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:27:05,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 14:27:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:05,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:05,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:05,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:05,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:05,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:27:05,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:05,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:27:05,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:05,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:27:05,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:27:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:27:05,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815313893] [2020-10-27 14:27:05,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:05,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:27:05,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851530628] [2020-10-27 14:27:05,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:27:05,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:05,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:27:05,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:27:05,458 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 15 states. [2020-10-27 14:27:06,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:06,138 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2020-10-27 14:27:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:27:06,139 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-27 14:27:06,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:06,141 INFO L225 Difference]: With dead ends: 92 [2020-10-27 14:27:06,141 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 14:27:06,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:27:06,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 14:27:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2020-10-27 14:27:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 14:27:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2020-10-27 14:27:06,154 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 37 [2020-10-27 14:27:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:06,154 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2020-10-27 14:27:06,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:27:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2020-10-27 14:27:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:27:06,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:06,156 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:06,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:27:06,157 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:06,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:06,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1632273125, now seen corresponding path program 1 times [2020-10-27 14:27:06,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:06,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211411283] [2020-10-27 14:27:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:06,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:06,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:07,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:07,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:27:07,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:07,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1314 [2020-10-27 14:27:07,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:07,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:27:07,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:07,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:27:07,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:07,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:07,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:07,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:07,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:07,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:07,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:27:07,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:07,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:07,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:07,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:07,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:27:07,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 14:27:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:07,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:07,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:07,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:07,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:07,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:07,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:07,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:07,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:07,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:07,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:27:07,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211411283] [2020-10-27 14:27:07,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:07,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:27:07,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537673014] [2020-10-27 14:27:07,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:27:07,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:07,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:27:07,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:27:07,590 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 8 states. [2020-10-27 14:27:07,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:07,723 INFO L93 Difference]: Finished difference Result 117 states and 143 transitions. [2020-10-27 14:27:07,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:27:07,723 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-27 14:27:07,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:07,724 INFO L225 Difference]: With dead ends: 117 [2020-10-27 14:27:07,724 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 14:27:07,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:27:07,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 14:27:07,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2020-10-27 14:27:07,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 14:27:07,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2020-10-27 14:27:07,743 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 37 [2020-10-27 14:27:07,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:07,745 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2020-10-27 14:27:07,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:27:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2020-10-27 14:27:07,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:27:07,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:07,749 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:07,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:27:07,749 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:07,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:07,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1305152447, now seen corresponding path program 2 times [2020-10-27 14:27:07,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:07,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327444713] [2020-10-27 14:27:07,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:07,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:07,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:07,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:09,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:09,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:27:09,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:09,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1625 [2020-10-27 14:27:09,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:09,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:27:09,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:09,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:27:09,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:09,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:09,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:09,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:09,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:09,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:09,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:27:09,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:09,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:09,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:09,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:09,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:09,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 14:27:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:09,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:09,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:09,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:09,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:09,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:09,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:09,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:09,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:09,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:09,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:27:09,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327444713] [2020-10-27 14:27:09,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:09,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:27:09,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962649535] [2020-10-27 14:27:09,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:27:09,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:09,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:27:09,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:27:09,483 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand 9 states. [2020-10-27 14:27:09,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:09,597 INFO L93 Difference]: Finished difference Result 129 states and 159 transitions. [2020-10-27 14:27:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:27:09,597 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-27 14:27:09,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:09,598 INFO L225 Difference]: With dead ends: 129 [2020-10-27 14:27:09,599 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 14:27:09,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:27:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 14:27:09,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2020-10-27 14:27:09,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 14:27:09,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2020-10-27 14:27:09,610 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 40 [2020-10-27 14:27:09,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:09,610 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2020-10-27 14:27:09,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:27:09,610 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2020-10-27 14:27:09,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:27:09,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:09,611 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:09,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:27:09,612 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:09,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:09,612 INFO L82 PathProgramCache]: Analyzing trace with hash -191711899, now seen corresponding path program 3 times [2020-10-27 14:27:09,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:09,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392865331] [2020-10-27 14:27:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:09,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:09,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:09,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:11,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:11,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:27:11,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:11,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2094 [2020-10-27 14:27:11,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:11,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:27:11,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:11,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:27:11,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:11,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:11,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:11,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:11,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:11,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:11,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:11,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:11,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:11,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:11,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:11,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:11,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 14:27:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:11,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:11,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:11,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:11,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:11,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:27:11,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:11,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:27:11,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:11,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:27:11,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:27:11,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392865331] [2020-10-27 14:27:11,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:11,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:27:11,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021981712] [2020-10-27 14:27:11,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:27:11,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:11,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:27:11,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:27:11,933 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand 13 states. [2020-10-27 14:27:12,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:12,459 INFO L93 Difference]: Finished difference Result 119 states and 144 transitions. [2020-10-27 14:27:12,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:27:12,459 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-27 14:27:12,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:12,461 INFO L225 Difference]: With dead ends: 119 [2020-10-27 14:27:12,461 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 14:27:12,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:27:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 14:27:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2020-10-27 14:27:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 14:27:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-10-27 14:27:12,480 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 43 [2020-10-27 14:27:12,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:12,480 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-10-27 14:27:12,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:27:12,481 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-10-27 14:27:12,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:27:12,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:12,482 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:12,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:27:12,483 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:12,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:12,483 INFO L82 PathProgramCache]: Analyzing trace with hash -701184989, now seen corresponding path program 4 times [2020-10-27 14:27:12,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:12,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838527094] [2020-10-27 14:27:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:12,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:12,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:12,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:14,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:14,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:27:14,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:14,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1611 [2020-10-27 14:27:14,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:14,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:27:14,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:14,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:27:14,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:14,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:14,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:14,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:14,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:14,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:14,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:14,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:14,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:14,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:14,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:14,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:14,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 14:27:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:14,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:14,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:14,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:14,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:14,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:14,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:14,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:27:14,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:14,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:27:14,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 14:27:14,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838527094] [2020-10-27 14:27:14,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:14,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:27:14,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344194786] [2020-10-27 14:27:14,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:27:14,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:14,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:27:14,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:27:14,293 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 11 states. [2020-10-27 14:27:14,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:14,717 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-10-27 14:27:14,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:27:14,717 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-27 14:27:14,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:14,719 INFO L225 Difference]: With dead ends: 104 [2020-10-27 14:27:14,719 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 14:27:14,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:27:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 14:27:14,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 72. [2020-10-27 14:27:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 14:27:14,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-10-27 14:27:14,737 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 43 [2020-10-27 14:27:14,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:14,737 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-10-27 14:27:14,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:27:14,738 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-10-27 14:27:14,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:27:14,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:14,739 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:14,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:27:14,739 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:14,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:14,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1839428389, now seen corresponding path program 5 times [2020-10-27 14:27:14,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:14,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873981275] [2020-10-27 14:27:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:14,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:14,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:14,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:14,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:19,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:19,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:27:19,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:19,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:27:19,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:19,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:27:19,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:19,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:27:19,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:19,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:19,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:19,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:19,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:19,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:19,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:19,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:19,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:19,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:19,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:19,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:19,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 14:27:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:19,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:19,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:19,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:19,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:19,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:27:19,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:19,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:19,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:19,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:19,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:27:19,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873981275] [2020-10-27 14:27:19,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:19,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:27:19,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71646044] [2020-10-27 14:27:19,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:27:19,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:19,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:27:19,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:27:19,890 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 10 states. [2020-10-27 14:27:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:20,015 INFO L93 Difference]: Finished difference Result 112 states and 133 transitions. [2020-10-27 14:27:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:27:20,015 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-27 14:27:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:20,016 INFO L225 Difference]: With dead ends: 112 [2020-10-27 14:27:20,016 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 14:27:20,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:27:20,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 14:27:20,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-10-27 14:27:20,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:27:20,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-10-27 14:27:20,030 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 43 [2020-10-27 14:27:20,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:20,031 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-10-27 14:27:20,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:27:20,031 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-10-27 14:27:20,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 14:27:20,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:20,032 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:20,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:27:20,032 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:20,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:20,033 INFO L82 PathProgramCache]: Analyzing trace with hash -121743233, now seen corresponding path program 6 times [2020-10-27 14:27:20,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:20,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725115435] [2020-10-27 14:27:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:20,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:20,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:20,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:20,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:25,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:25,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:27:25,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:25,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:27:25,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:25,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:27:25,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:25,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:27:25,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:25,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:25,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:25,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:25,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:25,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:25,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:25,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:25,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:25,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:25,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:25,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:25,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-27 14:27:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:25,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:25,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:25,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:25,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:25,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:25,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:25,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:27:25,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:25,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:27:25,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 42 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:27:25,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725115435] [2020-10-27 14:27:25,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:25,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:27:25,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016818679] [2020-10-27 14:27:25,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:27:25,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:25,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:27:25,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:27:25,471 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 22 states. [2020-10-27 14:27:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:26,344 INFO L93 Difference]: Finished difference Result 248 states and 315 transitions. [2020-10-27 14:27:26,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:27:26,345 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2020-10-27 14:27:26,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:26,348 INFO L225 Difference]: With dead ends: 248 [2020-10-27 14:27:26,348 INFO L226 Difference]: Without dead ends: 244 [2020-10-27 14:27:26,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:27:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-27 14:27:26,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 116. [2020-10-27 14:27:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 14:27:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 146 transitions. [2020-10-27 14:27:26,366 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 146 transitions. Word has length 46 [2020-10-27 14:27:26,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:26,366 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 146 transitions. [2020-10-27 14:27:26,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:27:26,366 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 146 transitions. [2020-10-27 14:27:26,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 14:27:26,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:26,367 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:26,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:27:26,367 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:26,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:26,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1810686975, now seen corresponding path program 7 times [2020-10-27 14:27:26,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:26,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300369032] [2020-10-27 14:27:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:26,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:26,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:26,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:26,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:31,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:31,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:27:31,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:31,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:27:31,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:31,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:27:31,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:31,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:27:31,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:31,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:31,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:31,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:31,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:31,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:31,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:31,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:31,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:31,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:31,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:31,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:31,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-27 14:27:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:31,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:31,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:31,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:31,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:31,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:31,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:31,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:31,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:31,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:31,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:27:31,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300369032] [2020-10-27 14:27:31,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:31,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:27:31,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605083310] [2020-10-27 14:27:31,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:27:31,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:31,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:27:31,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:27:31,505 INFO L87 Difference]: Start difference. First operand 116 states and 146 transitions. Second operand 11 states. [2020-10-27 14:27:31,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:31,669 INFO L93 Difference]: Finished difference Result 176 states and 225 transitions. [2020-10-27 14:27:31,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:27:31,669 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-27 14:27:31,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:31,670 INFO L225 Difference]: With dead ends: 176 [2020-10-27 14:27:31,670 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 14:27:31,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:27:31,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 14:27:31,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2020-10-27 14:27:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-27 14:27:31,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 170 transitions. [2020-10-27 14:27:31,704 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 170 transitions. Word has length 46 [2020-10-27 14:27:31,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:31,704 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 170 transitions. [2020-10-27 14:27:31,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:27:31,705 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 170 transitions. [2020-10-27 14:27:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:27:31,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:31,705 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:31,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:27:31,706 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:31,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:31,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1879471525, now seen corresponding path program 8 times [2020-10-27 14:27:31,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:31,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711036951] [2020-10-27 14:27:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:31,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:31,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:31,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:31,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:36,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:36,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:27:36,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:36,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:27:36,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:36,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:27:36,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:36,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:27:36,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:36,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:36,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:36,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:36,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:36,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:36,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:36,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:36,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:36,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:36,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:36,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:36,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-27 14:27:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:36,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:36,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:36,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:36,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:36,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:36,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:36,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:36,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:36,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:36,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:27:36,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711036951] [2020-10-27 14:27:36,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:36,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:27:36,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896935279] [2020-10-27 14:27:36,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:27:36,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:36,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:27:36,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:27:36,849 INFO L87 Difference]: Start difference. First operand 134 states and 170 transitions. Second operand 12 states. [2020-10-27 14:27:37,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:37,010 INFO L93 Difference]: Finished difference Result 194 states and 249 transitions. [2020-10-27 14:27:37,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:27:37,010 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-27 14:27:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:37,012 INFO L225 Difference]: With dead ends: 194 [2020-10-27 14:27:37,012 INFO L226 Difference]: Without dead ends: 164 [2020-10-27 14:27:37,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:27:37,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-27 14:27:37,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 152. [2020-10-27 14:27:37,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-27 14:27:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 194 transitions. [2020-10-27 14:27:37,026 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 194 transitions. Word has length 49 [2020-10-27 14:27:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:37,026 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 194 transitions. [2020-10-27 14:27:37,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:27:37,027 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 194 transitions. [2020-10-27 14:27:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:27:37,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:37,027 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:37,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:27:37,028 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:37,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:37,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1408436609, now seen corresponding path program 9 times [2020-10-27 14:27:37,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:37,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024633603] [2020-10-27 14:27:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:37,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:37,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:37,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:37,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:42,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:42,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:27:42,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:27:42,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:27:42,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:42,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:27:42,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:42,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:27:42,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:42,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:42,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:42,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:42,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:42,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:42,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:42,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:42,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:42,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:42,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:42,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:42,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 14:27:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:42,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:42,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:42,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:42,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:42,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:27:42,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:42,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:27:42,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:42,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:27:42,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-27 14:27:42,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024633603] [2020-10-27 14:27:42,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:42,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:27:42,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448926702] [2020-10-27 14:27:42,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:27:42,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:42,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:27:42,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:27:42,355 INFO L87 Difference]: Start difference. First operand 152 states and 194 transitions. Second operand 17 states. [2020-10-27 14:27:43,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:43,195 INFO L93 Difference]: Finished difference Result 280 states and 359 transitions. [2020-10-27 14:27:43,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:27:43,195 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-27 14:27:43,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:43,198 INFO L225 Difference]: With dead ends: 280 [2020-10-27 14:27:43,198 INFO L226 Difference]: Without dead ends: 276 [2020-10-27 14:27:43,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:27:43,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-27 14:27:43,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 155. [2020-10-27 14:27:43,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 14:27:43,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 198 transitions. [2020-10-27 14:27:43,223 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 198 transitions. Word has length 52 [2020-10-27 14:27:43,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:43,223 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 198 transitions. [2020-10-27 14:27:43,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:27:43,223 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 198 transitions. [2020-10-27 14:27:43,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:27:43,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:43,224 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:43,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:27:43,224 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:43,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:43,225 INFO L82 PathProgramCache]: Analyzing trace with hash 511043331, now seen corresponding path program 10 times [2020-10-27 14:27:43,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:43,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627081816] [2020-10-27 14:27:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:43,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:43,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:43,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:44,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:44,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:27:44,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:44,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1585 [2020-10-27 14:27:44,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:44,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:27:44,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:44,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:27:44,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:45,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:45,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:45,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:45,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:45,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:45,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:45,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:45,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:45,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:45,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:45,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 14:27:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:45,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:45,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:45,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:45,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:27:45,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:45,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:27:45,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:45,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:27:45,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 52 proven. 54 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:27:45,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627081816] [2020-10-27 14:27:45,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:45,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:27:45,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697739928] [2020-10-27 14:27:45,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:27:45,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:45,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:27:45,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:27:45,208 INFO L87 Difference]: Start difference. First operand 155 states and 198 transitions. Second operand 20 states. [2020-10-27 14:27:45,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:45,927 INFO L93 Difference]: Finished difference Result 291 states and 371 transitions. [2020-10-27 14:27:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:27:45,928 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-27 14:27:45,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:45,930 INFO L225 Difference]: With dead ends: 291 [2020-10-27 14:27:45,930 INFO L226 Difference]: Without dead ends: 287 [2020-10-27 14:27:45,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:27:45,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-27 14:27:45,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 144. [2020-10-27 14:27:45,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 14:27:45,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 183 transitions. [2020-10-27 14:27:45,953 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 183 transitions. Word has length 52 [2020-10-27 14:27:45,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:45,954 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 183 transitions. [2020-10-27 14:27:45,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:27:45,954 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 183 transitions. [2020-10-27 14:27:45,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 14:27:45,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:45,955 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:45,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:27:45,955 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:45,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1570241, now seen corresponding path program 11 times [2020-10-27 14:27:45,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:45,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456866693] [2020-10-27 14:27:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:45,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:45,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:46,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:47,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:47,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:27:47,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:47,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1394 [2020-10-27 14:27:47,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:47,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:27:47,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:47,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:27:47,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:47,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:47,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:47,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:47,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:47,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:47,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:47,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:47,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:47,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:47,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:47,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:47,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 14:27:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:47,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:47,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:47,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:47,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:47,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:47,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:47,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:47,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:27:47,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:47,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:27:47,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456866693] [2020-10-27 14:27:47,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:47,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:27:47,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759547260] [2020-10-27 14:27:47,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:27:47,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:47,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:27:47,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:27:47,520 INFO L87 Difference]: Start difference. First operand 144 states and 183 transitions. Second operand 13 states. [2020-10-27 14:27:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:47,689 INFO L93 Difference]: Finished difference Result 199 states and 254 transitions. [2020-10-27 14:27:47,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:27:47,690 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-27 14:27:47,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:47,692 INFO L225 Difference]: With dead ends: 199 [2020-10-27 14:27:47,692 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 14:27:47,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:27:47,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 14:27:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 159. [2020-10-27 14:27:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-27 14:27:47,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 203 transitions. [2020-10-27 14:27:47,716 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 203 transitions. Word has length 52 [2020-10-27 14:27:47,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:47,716 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 203 transitions. [2020-10-27 14:27:47,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:27:47,717 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 203 transitions. [2020-10-27 14:27:47,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:27:47,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:47,718 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:47,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:27:47,718 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:47,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1199684635, now seen corresponding path program 12 times [2020-10-27 14:27:47,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:47,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309793243] [2020-10-27 14:27:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:47,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:47,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:48,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:49,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:49,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:27:49,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:49,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2062 [2020-10-27 14:27:49,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:49,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:27:49,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:49,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 14:27:49,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:50,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:50,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:50,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:50,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:50,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:27:50,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:50,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:50,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:50,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:50,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:50,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 14:27:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:50,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:50,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:50,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:50,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:50,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:50,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:27:50,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:50,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:27:50,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 47 proven. 62 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-27 14:27:50,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309793243] [2020-10-27 14:27:50,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:50,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:27:50,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118707558] [2020-10-27 14:27:50,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:27:50,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:50,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:27:50,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:27:50,132 INFO L87 Difference]: Start difference. First operand 159 states and 203 transitions. Second operand 18 states. [2020-10-27 14:27:50,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:50,814 INFO L93 Difference]: Finished difference Result 279 states and 355 transitions. [2020-10-27 14:27:50,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:27:50,817 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-27 14:27:50,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:50,819 INFO L225 Difference]: With dead ends: 279 [2020-10-27 14:27:50,819 INFO L226 Difference]: Without dead ends: 275 [2020-10-27 14:27:50,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:27:50,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-27 14:27:50,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 142. [2020-10-27 14:27:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 14:27:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 180 transitions. [2020-10-27 14:27:50,842 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 180 transitions. Word has length 55 [2020-10-27 14:27:50,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:50,843 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 180 transitions. [2020-10-27 14:27:50,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:27:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 180 transitions. [2020-10-27 14:27:50,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:27:50,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:50,848 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:50,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:27:50,848 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:50,849 INFO L82 PathProgramCache]: Analyzing trace with hash 851299363, now seen corresponding path program 13 times [2020-10-27 14:27:50,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:50,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931925894] [2020-10-27 14:27:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:50,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:50,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:51,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:52,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:52,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:27:52,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:52,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1419 [2020-10-27 14:27:52,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:52,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:27:52,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:52,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 14:27:52,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:52,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:52,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:52,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:52,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:52,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:52,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:27:52,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:52,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:52,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:52,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:52,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:52,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 14:27:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:52,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:52,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:52,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:52,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:52,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:27:52,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:52,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:27:52,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:52,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:27:52,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 33 proven. 59 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-27 14:27:52,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931925894] [2020-10-27 14:27:52,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:52,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:27:52,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579107672] [2020-10-27 14:27:52,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:27:52,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:52,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:27:52,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:27:52,557 INFO L87 Difference]: Start difference. First operand 142 states and 180 transitions. Second operand 16 states. [2020-10-27 14:27:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:53,131 INFO L93 Difference]: Finished difference Result 231 states and 291 transitions. [2020-10-27 14:27:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:27:53,132 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-10-27 14:27:53,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:53,134 INFO L225 Difference]: With dead ends: 231 [2020-10-27 14:27:53,134 INFO L226 Difference]: Without dead ends: 227 [2020-10-27 14:27:53,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:27:53,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-27 14:27:53,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 122. [2020-10-27 14:27:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 14:27:53,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 153 transitions. [2020-10-27 14:27:53,148 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 153 transitions. Word has length 55 [2020-10-27 14:27:53,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:53,149 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 153 transitions. [2020-10-27 14:27:53,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:27:53,149 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 153 transitions. [2020-10-27 14:27:53,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:27:53,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:53,150 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:53,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:27:53,150 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:53,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:53,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1510830885, now seen corresponding path program 14 times [2020-10-27 14:27:53,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:53,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739319635] [2020-10-27 14:27:53,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:53,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:53,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:53,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:54,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:54,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:27:54,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:54,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1311 [2020-10-27 14:27:54,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:54,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:27:54,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:54,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 14:27:54,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:54,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:54,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:54,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:54,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:54,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:54,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:54,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:54,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:54,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:54,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:54,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:54,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 14:27:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:54,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:54,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:54,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:54,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:54,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:27:54,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:54,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:27:54,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:54,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:27:54,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:27:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 18 proven. 54 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-27 14:27:54,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739319635] [2020-10-27 14:27:54,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:54,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:27:54,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516799464] [2020-10-27 14:27:54,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:27:54,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:54,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:27:54,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:27:54,717 INFO L87 Difference]: Start difference. First operand 122 states and 153 transitions. Second operand 14 states. [2020-10-27 14:27:55,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:55,263 INFO L93 Difference]: Finished difference Result 177 states and 219 transitions. [2020-10-27 14:27:55,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:27:55,264 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-10-27 14:27:55,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:55,265 INFO L225 Difference]: With dead ends: 177 [2020-10-27 14:27:55,265 INFO L226 Difference]: Without dead ends: 173 [2020-10-27 14:27:55,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:27:55,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-27 14:27:55,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 99. [2020-10-27 14:27:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 14:27:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 122 transitions. [2020-10-27 14:27:55,280 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 122 transitions. Word has length 55 [2020-10-27 14:27:55,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:55,281 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 122 transitions. [2020-10-27 14:27:55,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:27:55,281 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 122 transitions. [2020-10-27 14:27:55,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:27:55,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:55,282 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:55,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:27:55,284 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:55,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:55,284 INFO L82 PathProgramCache]: Analyzing trace with hash 139023587, now seen corresponding path program 1 times [2020-10-27 14:27:55,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:55,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444355941] [2020-10-27 14:27:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:55,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:55,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:55,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:56,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:27:56,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:27:56,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-27 14:27:56,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:56,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:27:56,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:27:56,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 14:27:56,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:56,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:27:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:56,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:56,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:27:56,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:56,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:56,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:56,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:27:56,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:56,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:27:56,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:56,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 14:27:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:56,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:27:56,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:27:56,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:27:56,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:27:56,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:27:56,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:27:56,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:27:56,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:27:56,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:27:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 14:27:56,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444355941] [2020-10-27 14:27:56,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:27:56,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:27:56,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550760169] [2020-10-27 14:27:56,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:27:56,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:27:56,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:27:56,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:27:56,367 INFO L87 Difference]: Start difference. First operand 99 states and 122 transitions. Second operand 12 states. [2020-10-27 14:27:56,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:27:56,798 INFO L93 Difference]: Finished difference Result 151 states and 184 transitions. [2020-10-27 14:27:56,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:27:56,799 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-27 14:27:56,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:27:56,800 INFO L225 Difference]: With dead ends: 151 [2020-10-27 14:27:56,800 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 14:27:56,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:27:56,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 14:27:56,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 67. [2020-10-27 14:27:56,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 14:27:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-10-27 14:27:56,813 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 55 [2020-10-27 14:27:56,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:27:56,814 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-10-27 14:27:56,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:27:56,814 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-10-27 14:27:56,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:27:56,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:27:56,815 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:27:56,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:27:56,815 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:27:56,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:27:56,816 INFO L82 PathProgramCache]: Analyzing trace with hash 536289149, now seen corresponding path program 5 times [2020-10-27 14:27:56,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:27:56,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107116884] [2020-10-27 14:27:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:27:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:27:56,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:56,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:27:57,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:00,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:00,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:28:00,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:00,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3225 [2020-10-27 14:28:00,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:00,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:28:00,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:28:00,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:28:00,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:00,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:00,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:00,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:00,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:00,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:00,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:00,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:00,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:00,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:00,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:00,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:00,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 14:28:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:00,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:00,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:00,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:00,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:00,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:28:00,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:00,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:00,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-27 14:28:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:00,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:00,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:00,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:00,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:00,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:28:00,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:00,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 145 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:28:00,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107116884] [2020-10-27 14:28:00,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:00,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:28:00,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455854369] [2020-10-27 14:28:00,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:28:00,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:00,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:28:00,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:28:00,219 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 14 states. [2020-10-27 14:28:00,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:00,366 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2020-10-27 14:28:00,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:28:00,366 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-27 14:28:00,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:00,367 INFO L225 Difference]: With dead ends: 99 [2020-10-27 14:28:00,367 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 14:28:00,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:28:00,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 14:28:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-27 14:28:00,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 14:28:00,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2020-10-27 14:28:00,383 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 63 [2020-10-27 14:28:00,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:00,384 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2020-10-27 14:28:00,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:28:00,384 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2020-10-27 14:28:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 14:28:00,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:00,386 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:00,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:28:00,386 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:00,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:00,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1370287589, now seen corresponding path program 6 times [2020-10-27 14:28:00,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:00,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799030957] [2020-10-27 14:28:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:00,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:00,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:00,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:04,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:04,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 14:28:04,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:04,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3974 [2020-10-27 14:28:04,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:04,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:28:04,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:28:04,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:28:04,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:05,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:05,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:05,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:05,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:05,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:05,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:05,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:05,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:05,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:05,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:05,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:05,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 14:28:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:05,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:05,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:05,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:05,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:05,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:05,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:05,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:28:05,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:05,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:28:05,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:05,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-27 14:28:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:05,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:05,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:05,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:05,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:05,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:05,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:05,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:28:05,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:05,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:28:05,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 81 proven. 107 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:28:05,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799030957] [2020-10-27 14:28:05,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:05,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:28:05,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640066771] [2020-10-27 14:28:05,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:28:05,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:05,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:28:05,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:28:05,108 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand 29 states. [2020-10-27 14:28:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:06,293 INFO L93 Difference]: Finished difference Result 310 states and 396 transitions. [2020-10-27 14:28:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:28:06,294 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-27 14:28:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:06,297 INFO L225 Difference]: With dead ends: 310 [2020-10-27 14:28:06,297 INFO L226 Difference]: Without dead ends: 306 [2020-10-27 14:28:06,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:28:06,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-27 14:28:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 212. [2020-10-27 14:28:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-27 14:28:06,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 273 transitions. [2020-10-27 14:28:06,336 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 273 transitions. Word has length 66 [2020-10-27 14:28:06,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:06,336 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 273 transitions. [2020-10-27 14:28:06,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:28:06,337 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 273 transitions. [2020-10-27 14:28:06,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 14:28:06,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:06,338 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:06,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:28:06,338 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:06,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:06,339 INFO L82 PathProgramCache]: Analyzing trace with hash 552940445, now seen corresponding path program 15 times [2020-10-27 14:28:06,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:06,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402383950] [2020-10-27 14:28:06,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:06,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:06,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:06,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:09,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:09,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 14:28:09,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:09,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3111 [2020-10-27 14:28:09,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:09,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:28:09,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:28:09,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:28:09,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:10,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:10,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:10,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:10,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:10,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:10,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:10,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:10,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:10,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:10,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:10,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:10,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 14:28:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:10,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:10,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:10,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:10,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:10,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:10,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:10,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:28:10,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:10,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:28:10,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:10,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-27 14:28:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:10,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:10,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:10,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:10,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:10,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:10,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:10,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:28:10,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:10,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:28:10,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 73 proven. 113 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:28:10,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402383950] [2020-10-27 14:28:10,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:10,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:28:10,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975876182] [2020-10-27 14:28:10,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:28:10,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:10,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:28:10,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:28:10,082 INFO L87 Difference]: Start difference. First operand 212 states and 273 transitions. Second operand 27 states. [2020-10-27 14:28:11,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:11,211 INFO L93 Difference]: Finished difference Result 314 states and 399 transitions. [2020-10-27 14:28:11,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:28:11,212 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 66 [2020-10-27 14:28:11,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:11,215 INFO L225 Difference]: With dead ends: 314 [2020-10-27 14:28:11,215 INFO L226 Difference]: Without dead ends: 310 [2020-10-27 14:28:11,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:28:11,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-27 14:28:11,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 209. [2020-10-27 14:28:11,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-27 14:28:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 268 transitions. [2020-10-27 14:28:11,269 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 268 transitions. Word has length 66 [2020-10-27 14:28:11,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:11,269 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 268 transitions. [2020-10-27 14:28:11,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:28:11,269 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 268 transitions. [2020-10-27 14:28:11,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 14:28:11,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:11,271 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:11,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:28:11,271 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:11,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:11,273 INFO L82 PathProgramCache]: Analyzing trace with hash 575572699, now seen corresponding path program 16 times [2020-10-27 14:28:11,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:11,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644426253] [2020-10-27 14:28:11,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:11,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:11,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:11,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:14,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:14,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 14:28:14,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:14,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3019 [2020-10-27 14:28:14,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:14,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:28:14,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:28:14,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:28:14,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:14,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:14,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:14,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:14,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:14,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:14,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:14,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:14,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:14,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 14:28:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:14,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:14,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:14,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:14,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:14,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:28:14,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:14,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:14,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:14,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:14,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:14,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-27 14:28:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:14,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:14,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:14,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:14,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:14,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:14,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:14,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:14,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:14,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:14,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 4 proven. 176 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:28:14,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644426253] [2020-10-27 14:28:14,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:14,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:28:14,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071544151] [2020-10-27 14:28:14,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:28:14,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:14,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:28:14,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:28:14,483 INFO L87 Difference]: Start difference. First operand 209 states and 268 transitions. Second operand 15 states. [2020-10-27 14:28:14,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:14,705 INFO L93 Difference]: Finished difference Result 296 states and 384 transitions. [2020-10-27 14:28:14,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:28:14,706 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-10-27 14:28:14,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:14,708 INFO L225 Difference]: With dead ends: 296 [2020-10-27 14:28:14,708 INFO L226 Difference]: Without dead ends: 254 [2020-10-27 14:28:14,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:28:14,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-27 14:28:14,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 236. [2020-10-27 14:28:14,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-27 14:28:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 304 transitions. [2020-10-27 14:28:14,741 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 304 transitions. Word has length 66 [2020-10-27 14:28:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:14,742 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 304 transitions. [2020-10-27 14:28:14,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:28:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 304 transitions. [2020-10-27 14:28:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:28:14,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:14,743 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:14,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:28:14,743 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:14,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:14,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1676893313, now seen corresponding path program 17 times [2020-10-27 14:28:14,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:14,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444177051] [2020-10-27 14:28:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:14,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:14,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:15,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:18,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:18,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 14:28:18,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:18,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3650 [2020-10-27 14:28:18,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:18,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:28:18,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:28:18,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:28:18,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:18,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:18,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:18,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:18,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:18,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:18,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:28:18,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:18,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:18,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-27 14:28:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:18,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:18,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:18,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:18,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:18,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:28:18,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:18,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:18,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:18,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:18,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:18,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-27 14:28:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:18,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:18,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:18,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:18,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:18,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:18,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:18,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:18,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:18,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:18,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 4 proven. 210 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:28:18,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444177051] [2020-10-27 14:28:18,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:18,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:28:18,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252730137] [2020-10-27 14:28:18,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:28:18,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:18,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:28:18,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:28:18,611 INFO L87 Difference]: Start difference. First operand 236 states and 304 transitions. Second operand 16 states. [2020-10-27 14:28:18,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:18,828 INFO L93 Difference]: Finished difference Result 323 states and 420 transitions. [2020-10-27 14:28:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:28:18,829 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-10-27 14:28:18,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:18,831 INFO L225 Difference]: With dead ends: 323 [2020-10-27 14:28:18,831 INFO L226 Difference]: Without dead ends: 281 [2020-10-27 14:28:18,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:28:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-27 14:28:18,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 263. [2020-10-27 14:28:18,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-27 14:28:18,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 340 transitions. [2020-10-27 14:28:18,861 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 340 transitions. Word has length 69 [2020-10-27 14:28:18,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:18,861 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 340 transitions. [2020-10-27 14:28:18,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:28:18,862 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 340 transitions. [2020-10-27 14:28:18,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 14:28:18,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:18,863 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 9, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:18,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:28:18,863 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:18,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:18,863 INFO L82 PathProgramCache]: Analyzing trace with hash -322824101, now seen corresponding path program 18 times [2020-10-27 14:28:18,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:18,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53259031] [2020-10-27 14:28:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:18,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:18,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:19,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:23,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:23,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 14:28:23,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:23,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4243 [2020-10-27 14:28:23,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:23,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:28:23,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:28:23,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:28:23,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:23,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:23,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:23,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:23,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:23,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:23,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:23,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:23,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:23,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-27 14:28:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:23,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:23,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:23,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:23,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:23,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:28:23,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:23,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:23,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:23,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:23,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:23,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 14:28:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:23,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:23,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:23,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:23,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:23,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:28:23,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:23,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:23,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:23,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:23,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 4 proven. 247 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:28:23,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53259031] [2020-10-27 14:28:23,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:23,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:28:23,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613540735] [2020-10-27 14:28:23,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:28:23,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:23,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:28:23,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:28:23,339 INFO L87 Difference]: Start difference. First operand 263 states and 340 transitions. Second operand 17 states. [2020-10-27 14:28:23,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:23,522 INFO L93 Difference]: Finished difference Result 350 states and 456 transitions. [2020-10-27 14:28:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:28:23,523 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-27 14:28:23,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:23,526 INFO L225 Difference]: With dead ends: 350 [2020-10-27 14:28:23,526 INFO L226 Difference]: Without dead ends: 308 [2020-10-27 14:28:23,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:28:23,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-27 14:28:23,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 290. [2020-10-27 14:28:23,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-27 14:28:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 376 transitions. [2020-10-27 14:28:23,569 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 376 transitions. Word has length 72 [2020-10-27 14:28:23,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:23,569 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 376 transitions. [2020-10-27 14:28:23,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:28:23,569 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 376 transitions. [2020-10-27 14:28:23,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:28:23,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:23,572 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 9, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:23,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:28:23,572 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:23,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:23,573 INFO L82 PathProgramCache]: Analyzing trace with hash 420226559, now seen corresponding path program 19 times [2020-10-27 14:28:23,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:23,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013790280] [2020-10-27 14:28:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:23,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:23,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:23,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:28,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:28,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:28:28,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:28,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:28:28,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:28,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:28:28,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:28:28,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:28:28,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:28,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:28,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:28,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:28,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:28,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:28,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:28,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:28,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:28,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:28,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:28,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:28,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-27 14:28:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:28,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:28,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:28,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:28,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:28,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:28:28,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:28,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:28,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:28,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:28,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:28,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-27 14:28:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:28,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:28,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:28,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:28,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:28,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:28:28,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:28,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:28,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:28,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:28,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 287 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:28:28,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013790280] [2020-10-27 14:28:28,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:28,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:28:28,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411480413] [2020-10-27 14:28:28,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:28:28,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:28,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:28:28,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:28:28,848 INFO L87 Difference]: Start difference. First operand 290 states and 376 transitions. Second operand 18 states. [2020-10-27 14:28:29,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:29,053 INFO L93 Difference]: Finished difference Result 377 states and 492 transitions. [2020-10-27 14:28:29,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:28:29,056 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-10-27 14:28:29,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:29,058 INFO L225 Difference]: With dead ends: 377 [2020-10-27 14:28:29,058 INFO L226 Difference]: Without dead ends: 335 [2020-10-27 14:28:29,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:28:29,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-27 14:28:29,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 317. [2020-10-27 14:28:29,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-27 14:28:29,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 412 transitions. [2020-10-27 14:28:29,100 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 412 transitions. Word has length 75 [2020-10-27 14:28:29,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:29,100 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 412 transitions. [2020-10-27 14:28:29,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:28:29,100 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 412 transitions. [2020-10-27 14:28:29,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 14:28:29,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:29,102 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:29,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:28:29,102 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:29,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:29,102 INFO L82 PathProgramCache]: Analyzing trace with hash 380995035, now seen corresponding path program 20 times [2020-10-27 14:28:29,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:29,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77183287] [2020-10-27 14:28:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:29,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:29,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:29,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:34,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:34,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 14:28:34,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:34,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:28:34,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:28:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:28:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:28:34,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:34,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:34,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:34,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:34,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:34,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:34,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:34,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:34,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:34,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:34,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:34,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:34,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-27 14:28:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:34,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:34,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:34,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:34,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:34,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:34,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:34,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:34,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:34,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:34,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:34,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-27 14:28:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:34,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:34,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:34,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:34,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:34,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:28:34,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:34,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:34,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 330 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:28:34,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77183287] [2020-10-27 14:28:34,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:34,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:28:34,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137970467] [2020-10-27 14:28:34,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:28:34,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:34,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:28:34,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:28:34,385 INFO L87 Difference]: Start difference. First operand 317 states and 412 transitions. Second operand 19 states. [2020-10-27 14:28:34,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:34,640 INFO L93 Difference]: Finished difference Result 404 states and 528 transitions. [2020-10-27 14:28:34,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:28:34,641 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2020-10-27 14:28:34,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:34,644 INFO L225 Difference]: With dead ends: 404 [2020-10-27 14:28:34,644 INFO L226 Difference]: Without dead ends: 362 [2020-10-27 14:28:34,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:28:34,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-27 14:28:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 344. [2020-10-27 14:28:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-27 14:28:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 448 transitions. [2020-10-27 14:28:34,688 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 448 transitions. Word has length 78 [2020-10-27 14:28:34,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:34,688 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 448 transitions. [2020-10-27 14:28:34,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:28:34,688 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 448 transitions. [2020-10-27 14:28:34,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:28:34,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:34,697 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 9, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:34,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:28:34,697 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:34,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:34,697 INFO L82 PathProgramCache]: Analyzing trace with hash -134231937, now seen corresponding path program 21 times [2020-10-27 14:28:34,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:34,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673032453] [2020-10-27 14:28:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:34,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:34,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:35,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:39,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:39,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:28:39,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:39,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:28:39,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:39,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:28:39,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:28:39,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 14:28:39,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:40,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:40,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:40,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:40,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:40,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:40,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:40,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:40,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:40,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:40,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:40,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:40,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-27 14:28:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:40,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:40,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:40,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:40,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:40,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:40,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:40,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:28:40,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:40,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:28:40,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:40,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-27 14:28:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:40,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:40,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:40,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:40,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:40,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:40,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:40,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:28:40,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:40,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:28:40,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 114 proven. 197 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 14:28:40,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673032453] [2020-10-27 14:28:40,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:40,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:28:40,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534235386] [2020-10-27 14:28:40,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:28:40,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:40,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:28:40,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:28:40,282 INFO L87 Difference]: Start difference. First operand 344 states and 448 transitions. Second operand 25 states. [2020-10-27 14:28:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:41,346 INFO L93 Difference]: Finished difference Result 435 states and 560 transitions. [2020-10-27 14:28:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:28:41,347 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2020-10-27 14:28:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:41,350 INFO L225 Difference]: With dead ends: 435 [2020-10-27 14:28:41,350 INFO L226 Difference]: Without dead ends: 431 [2020-10-27 14:28:41,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:28:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-10-27 14:28:41,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 324. [2020-10-27 14:28:41,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-27 14:28:41,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 421 transitions. [2020-10-27 14:28:41,390 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 421 transitions. Word has length 81 [2020-10-27 14:28:41,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:41,390 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 421 transitions. [2020-10-27 14:28:41,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:28:41,391 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 421 transitions. [2020-10-27 14:28:41,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:28:41,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:41,392 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:41,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:28:41,393 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:41,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:41,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1804930109, now seen corresponding path program 22 times [2020-10-27 14:28:41,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:41,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524673345] [2020-10-27 14:28:41,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:41,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:41,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:41,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:46,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:46,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:28:46,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:46,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:28:46,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:46,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:28:46,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:28:46,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:28:46,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:46,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:46,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:46,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:46,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:46,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:46,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:46,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:46,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:46,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:46,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:46,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:46,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-27 14:28:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:46,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:46,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:46,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:46,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:46,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:46,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:46,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:46,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:46,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:46,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:46,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-27 14:28:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:46,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:46,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:46,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:46,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:46,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:28:46,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:46,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:46,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:28:46,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:46,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 4 proven. 376 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:28:46,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524673345] [2020-10-27 14:28:46,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:46,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:28:46,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202404362] [2020-10-27 14:28:46,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:28:46,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:46,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:28:46,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:28:46,702 INFO L87 Difference]: Start difference. First operand 324 states and 421 transitions. Second operand 20 states. [2020-10-27 14:28:46,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:46,973 INFO L93 Difference]: Finished difference Result 406 states and 529 transitions. [2020-10-27 14:28:46,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:28:46,974 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2020-10-27 14:28:46,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:46,976 INFO L225 Difference]: With dead ends: 406 [2020-10-27 14:28:46,977 INFO L226 Difference]: Without dead ends: 364 [2020-10-27 14:28:46,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:28:46,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-27 14:28:47,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 348. [2020-10-27 14:28:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-27 14:28:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 453 transitions. [2020-10-27 14:28:47,020 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 453 transitions. Word has length 81 [2020-10-27 14:28:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:47,021 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 453 transitions. [2020-10-27 14:28:47,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:28:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 453 transitions. [2020-10-27 14:28:47,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 14:28:47,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:47,023 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:47,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:28:47,023 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:47,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:47,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1076424995, now seen corresponding path program 23 times [2020-10-27 14:28:47,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:47,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97047744] [2020-10-27 14:28:47,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:47,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:47,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:47,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:52,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:52,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 14:28:52,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:52,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:28:52,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:52,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:28:52,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:28:52,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 14:28:52,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:52,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:52,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:52,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:52,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:52,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:52,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:52,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:52,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:52,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:52,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:52,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:52,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 14:28:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:52,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:52,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:52,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:52,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:52,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:52,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:52,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:28:52,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:52,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:28:52,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:52,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-27 14:28:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:52,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:52,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:52,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:52,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:52,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:52,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:52,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:28:52,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:52,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:28:52,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 102 proven. 209 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-10-27 14:28:52,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97047744] [2020-10-27 14:28:52,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:52,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:28:52,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919653179] [2020-10-27 14:28:52,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:28:52,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:52,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:28:52,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:28:52,531 INFO L87 Difference]: Start difference. First operand 348 states and 453 transitions. Second operand 23 states. [2020-10-27 14:28:53,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:28:53,534 INFO L93 Difference]: Finished difference Result 428 states and 551 transitions. [2020-10-27 14:28:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:28:53,535 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2020-10-27 14:28:53,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:28:53,537 INFO L225 Difference]: With dead ends: 428 [2020-10-27 14:28:53,537 INFO L226 Difference]: Without dead ends: 424 [2020-10-27 14:28:53,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:28:53,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-27 14:28:53,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 322. [2020-10-27 14:28:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-27 14:28:53,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 418 transitions. [2020-10-27 14:28:53,582 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 418 transitions. Word has length 84 [2020-10-27 14:28:53,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:28:53,582 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 418 transitions. [2020-10-27 14:28:53,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:28:53,583 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 418 transitions. [2020-10-27 14:28:53,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 14:28:53,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:28:53,584 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:28:53,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:28:53,584 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:28:53,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:28:53,585 INFO L82 PathProgramCache]: Analyzing trace with hash -200405989, now seen corresponding path program 24 times [2020-10-27 14:28:53,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:28:53,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019794229] [2020-10-27 14:28:53,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:28:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:53,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:53,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:54,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:58,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:58,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 14:28:58,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:28:58,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:28:58,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:58,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:28:58,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:28:58,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 14:28:58,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:58,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:28:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:58,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:58,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:58,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:28:58,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:58,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:58,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:58,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:28:58,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:58,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:28:58,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:58,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 14:28:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:58,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:58,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:58,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:58,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:58,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:28:58,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:58,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:28:58,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:58,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:28:58,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:58,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-27 14:28:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:28:58,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:28:58,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:28:58,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:28:58,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:28:58,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:28:58,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:28:58,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:28:58,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:28:58,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:28:58,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:28:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 79 proven. 203 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-10-27 14:28:59,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019794229] [2020-10-27 14:28:59,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:28:59,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:28:59,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835890671] [2020-10-27 14:28:59,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:28:59,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:28:59,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:28:59,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:28:59,014 INFO L87 Difference]: Start difference. First operand 322 states and 418 transitions. Second operand 21 states. [2020-10-27 14:29:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:00,015 INFO L93 Difference]: Finished difference Result 391 states and 502 transitions. [2020-10-27 14:29:00,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:29:00,016 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2020-10-27 14:29:00,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:00,018 INFO L225 Difference]: With dead ends: 391 [2020-10-27 14:29:00,018 INFO L226 Difference]: Without dead ends: 387 [2020-10-27 14:29:00,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:29:00,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-27 14:29:00,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 293. [2020-10-27 14:29:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-27 14:29:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 379 transitions. [2020-10-27 14:29:00,061 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 379 transitions. Word has length 84 [2020-10-27 14:29:00,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:00,061 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 379 transitions. [2020-10-27 14:29:00,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:29:00,061 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 379 transitions. [2020-10-27 14:29:00,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 14:29:00,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:00,062 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:00,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:29:00,063 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:00,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:00,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1060511261, now seen corresponding path program 25 times [2020-10-27 14:29:00,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:00,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144295463] [2020-10-27 14:29:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:00,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:00,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:00,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:05,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:05,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 14:29:05,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:05,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:29:05,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:05,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:29:05,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:29:05,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 14:29:05,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:05,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:05,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:05,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:05,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:05,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:05,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:05,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:05,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:05,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:05,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:05,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:05,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 14:29:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:05,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:05,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:05,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:05,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:05,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:29:05,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:05,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:05,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:05,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:05,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:05,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-27 14:29:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:05,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:05,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:05,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:05,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:05,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:29:05,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:05,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:05,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:05,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:05,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 4 proven. 425 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:29:05,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144295463] [2020-10-27 14:29:05,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:05,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:29:05,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804581822] [2020-10-27 14:29:05,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:29:05,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:05,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:29:05,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:29:05,412 INFO L87 Difference]: Start difference. First operand 293 states and 379 transitions. Second operand 21 states. [2020-10-27 14:29:05,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:05,653 INFO L93 Difference]: Finished difference Result 365 states and 471 transitions. [2020-10-27 14:29:05,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:29:05,654 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2020-10-27 14:29:05,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:05,656 INFO L225 Difference]: With dead ends: 365 [2020-10-27 14:29:05,656 INFO L226 Difference]: Without dead ends: 323 [2020-10-27 14:29:05,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:29:05,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-27 14:29:05,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 311. [2020-10-27 14:29:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-27 14:29:05,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 403 transitions. [2020-10-27 14:29:05,693 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 403 transitions. Word has length 84 [2020-10-27 14:29:05,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:05,693 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 403 transitions. [2020-10-27 14:29:05,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:29:05,693 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 403 transitions. [2020-10-27 14:29:05,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:29:05,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:05,694 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 12, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:05,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:29:05,695 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:05,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:05,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1152790781, now seen corresponding path program 26 times [2020-10-27 14:29:05,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:05,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400208228] [2020-10-27 14:29:05,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:05,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:05,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:06,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:10,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:10,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 14:29:10,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:10,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:29:10,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:10,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:29:10,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:29:10,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:29:10,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:11,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:11,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:11,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:11,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:11,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:11,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:11,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:11,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:11,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:11,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:11,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:11,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-27 14:29:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:11,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:11,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:11,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:11,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:11,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:29:11,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:11,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:11,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:11,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:11,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:11,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-27 14:29:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:11,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:11,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:11,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:11,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:11,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:29:11,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:11,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:11,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:11,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:11,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 4 proven. 477 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:29:11,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400208228] [2020-10-27 14:29:11,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:11,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:29:11,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580447155] [2020-10-27 14:29:11,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:29:11,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:11,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:29:11,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:29:11,071 INFO L87 Difference]: Start difference. First operand 311 states and 403 transitions. Second operand 22 states. [2020-10-27 14:29:11,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:11,276 INFO L93 Difference]: Finished difference Result 383 states and 495 transitions. [2020-10-27 14:29:11,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:29:11,277 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2020-10-27 14:29:11,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:11,280 INFO L225 Difference]: With dead ends: 383 [2020-10-27 14:29:11,280 INFO L226 Difference]: Without dead ends: 341 [2020-10-27 14:29:11,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:29:11,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-27 14:29:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 329. [2020-10-27 14:29:11,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-27 14:29:11,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 427 transitions. [2020-10-27 14:29:11,316 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 427 transitions. Word has length 87 [2020-10-27 14:29:11,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:11,316 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 427 transitions. [2020-10-27 14:29:11,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:29:11,316 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 427 transitions. [2020-10-27 14:29:11,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 14:29:11,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:11,317 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 13, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:11,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 14:29:11,317 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:11,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:11,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1472901661, now seen corresponding path program 27 times [2020-10-27 14:29:11,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:11,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580442967] [2020-10-27 14:29:11,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:11,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:11,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:11,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:16,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:16,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 14:29:16,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:16,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:29:16,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:16,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:29:16,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:29:16,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 14:29:16,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:16,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:16,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:16,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:16,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:16,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:16,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:16,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:16,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:16,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:16,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:16,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:16,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-27 14:29:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:16,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:16,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:16,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:16,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:16,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:29:16,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:16,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:16,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:16,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:16,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:16,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-27 14:29:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:16,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:16,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:16,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:16,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:16,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:29:16,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:16,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:16,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:16,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:16,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 4 proven. 532 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:29:16,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580442967] [2020-10-27 14:29:16,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:16,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:29:16,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731838682] [2020-10-27 14:29:16,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:29:16,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:16,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:29:16,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:29:16,712 INFO L87 Difference]: Start difference. First operand 329 states and 427 transitions. Second operand 23 states. [2020-10-27 14:29:16,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:16,967 INFO L93 Difference]: Finished difference Result 401 states and 519 transitions. [2020-10-27 14:29:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:29:16,968 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2020-10-27 14:29:16,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:16,970 INFO L225 Difference]: With dead ends: 401 [2020-10-27 14:29:16,971 INFO L226 Difference]: Without dead ends: 359 [2020-10-27 14:29:16,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:29:16,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-27 14:29:17,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 347. [2020-10-27 14:29:17,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2020-10-27 14:29:17,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 451 transitions. [2020-10-27 14:29:17,021 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 451 transitions. Word has length 90 [2020-10-27 14:29:17,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:17,021 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 451 transitions. [2020-10-27 14:29:17,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:29:17,021 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 451 transitions. [2020-10-27 14:29:17,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 14:29:17,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:17,023 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 14, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:17,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 14:29:17,023 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:17,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:17,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1226236675, now seen corresponding path program 28 times [2020-10-27 14:29:17,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:17,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6837885] [2020-10-27 14:29:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:17,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:17,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:17,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:22,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:22,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 14:29:22,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:22,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:29:22,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:22,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:29:22,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:29:22,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:29:22,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:22,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:22,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:22,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:22,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:22,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:22,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:22,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:22,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:22,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:22,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:22,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:22,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-27 14:29:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:22,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:22,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:22,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:22,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:22,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:22,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:22,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:22,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:22,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:22,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:22,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-27 14:29:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:22,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:22,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:22,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:22,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:22,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:22,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:22,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:22,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:22,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:22,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 4 proven. 590 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:29:22,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6837885] [2020-10-27 14:29:22,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:22,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:29:22,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514505715] [2020-10-27 14:29:22,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:29:22,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:22,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:29:22,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:29:22,565 INFO L87 Difference]: Start difference. First operand 347 states and 451 transitions. Second operand 24 states. [2020-10-27 14:29:22,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:22,792 INFO L93 Difference]: Finished difference Result 419 states and 543 transitions. [2020-10-27 14:29:22,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:29:22,792 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2020-10-27 14:29:22,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:22,794 INFO L225 Difference]: With dead ends: 419 [2020-10-27 14:29:22,794 INFO L226 Difference]: Without dead ends: 377 [2020-10-27 14:29:22,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:29:22,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-27 14:29:22,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 365. [2020-10-27 14:29:22,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-27 14:29:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 475 transitions. [2020-10-27 14:29:22,846 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 475 transitions. Word has length 93 [2020-10-27 14:29:22,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:22,846 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 475 transitions. [2020-10-27 14:29:22,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:29:22,846 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 475 transitions. [2020-10-27 14:29:22,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 14:29:22,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:22,848 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 15, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:22,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 14:29:22,848 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:22,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:22,848 INFO L82 PathProgramCache]: Analyzing trace with hash -878688739, now seen corresponding path program 29 times [2020-10-27 14:29:22,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:22,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369271224] [2020-10-27 14:29:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:22,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:22,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:23,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:27,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:27,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 14:29:27,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:27,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:29:27,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:27,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:29:27,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:29:27,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 14:29:27,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:28,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:28,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:28,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:28,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:28,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:28,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:28,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:28,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:28,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:28,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:28,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:28,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-27 14:29:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:28,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:28,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:28,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:28,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:28,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:29:28,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:28,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:28,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:28,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:28,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:28,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-27 14:29:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:28,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:28,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:28,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:28,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:28,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:28,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:28,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:28,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:28,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:28,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 4 proven. 651 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:29:28,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369271224] [2020-10-27 14:29:28,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:28,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:29:28,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840383658] [2020-10-27 14:29:28,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:29:28,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:28,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:29:28,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:29:28,335 INFO L87 Difference]: Start difference. First operand 365 states and 475 transitions. Second operand 25 states. [2020-10-27 14:29:28,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:28,632 INFO L93 Difference]: Finished difference Result 437 states and 567 transitions. [2020-10-27 14:29:28,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:29:28,632 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 96 [2020-10-27 14:29:28,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:28,635 INFO L225 Difference]: With dead ends: 437 [2020-10-27 14:29:28,635 INFO L226 Difference]: Without dead ends: 395 [2020-10-27 14:29:28,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:29:28,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-10-27 14:29:28,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 383. [2020-10-27 14:29:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-27 14:29:28,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 499 transitions. [2020-10-27 14:29:28,686 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 499 transitions. Word has length 96 [2020-10-27 14:29:28,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:28,686 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 499 transitions. [2020-10-27 14:29:28,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:29:28,686 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 499 transitions. [2020-10-27 14:29:28,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 14:29:28,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:28,688 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 16, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:28,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 14:29:28,688 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:28,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:28,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2050689277, now seen corresponding path program 30 times [2020-10-27 14:29:28,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:28,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787720814] [2020-10-27 14:29:28,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:28,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:28,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:29,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:33,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:33,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 14:29:33,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:33,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:29:33,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:33,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:29:33,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:29:33,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 14:29:33,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:34,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:34,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:34,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:34,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:34,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:34,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:34,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:34,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:34,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:34,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:34,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:34,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-27 14:29:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:34,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:34,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:34,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:34,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:34,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:34,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:34,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:29:34,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:34,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:29:34,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:34,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-27 14:29:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:34,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:34,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:34,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:34,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:34,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:34,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:34,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:29:34,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:34,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:29:34,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 75 proven. 260 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2020-10-27 14:29:34,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787720814] [2020-10-27 14:29:34,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:34,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:29:34,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088395531] [2020-10-27 14:29:34,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:29:34,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:34,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:29:34,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:29:34,071 INFO L87 Difference]: Start difference. First operand 383 states and 499 transitions. Second operand 19 states. [2020-10-27 14:29:34,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:34,969 INFO L93 Difference]: Finished difference Result 441 states and 569 transitions. [2020-10-27 14:29:34,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:29:34,970 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 99 [2020-10-27 14:29:34,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:34,973 INFO L225 Difference]: With dead ends: 441 [2020-10-27 14:29:34,973 INFO L226 Difference]: Without dead ends: 437 [2020-10-27 14:29:34,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:29:34,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-27 14:29:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 336. [2020-10-27 14:29:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-27 14:29:35,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 436 transitions. [2020-10-27 14:29:35,021 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 436 transitions. Word has length 99 [2020-10-27 14:29:35,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:35,022 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 436 transitions. [2020-10-27 14:29:35,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:29:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 436 transitions. [2020-10-27 14:29:35,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 14:29:35,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:35,023 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 17, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:35,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 14:29:35,024 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:35,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:35,024 INFO L82 PathProgramCache]: Analyzing trace with hash -510173569, now seen corresponding path program 31 times [2020-10-27 14:29:35,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:35,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19633550] [2020-10-27 14:29:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:35,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:35,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:35,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:40,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:40,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 14:29:40,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:40,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:29:40,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:40,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:29:40,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:29:40,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 14:29:40,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:40,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:40,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:40,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:40,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:40,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:40,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:40,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:40,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:40,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:40,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:40,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:40,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-27 14:29:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:40,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:40,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:40,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:40,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:40,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:40,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:40,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:29:40,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:40,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:29:40,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:40,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-27 14:29:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:40,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:40,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:40,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:40,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:40,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:40,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:40,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:29:40,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:40,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:29:40,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 40 proven. 245 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2020-10-27 14:29:40,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19633550] [2020-10-27 14:29:40,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:40,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:29:40,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740130371] [2020-10-27 14:29:40,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:29:40,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:40,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:29:40,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:29:40,356 INFO L87 Difference]: Start difference. First operand 336 states and 436 transitions. Second operand 17 states. [2020-10-27 14:29:41,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:41,189 INFO L93 Difference]: Finished difference Result 383 states and 492 transitions. [2020-10-27 14:29:41,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:29:41,190 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 99 [2020-10-27 14:29:41,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:41,192 INFO L225 Difference]: With dead ends: 383 [2020-10-27 14:29:41,193 INFO L226 Difference]: Without dead ends: 379 [2020-10-27 14:29:41,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:29:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-27 14:29:41,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 286. [2020-10-27 14:29:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-27 14:29:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 369 transitions. [2020-10-27 14:29:41,234 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 369 transitions. Word has length 99 [2020-10-27 14:29:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:41,235 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 369 transitions. [2020-10-27 14:29:41,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:29:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 369 transitions. [2020-10-27 14:29:41,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 14:29:41,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:41,236 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 18, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:41,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 14:29:41,236 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:41,237 INFO L82 PathProgramCache]: Analyzing trace with hash 328860093, now seen corresponding path program 32 times [2020-10-27 14:29:41,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:41,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076837616] [2020-10-27 14:29:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:41,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:41,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:41,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:46,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:46,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 14:29:46,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:46,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:29:46,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:46,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:29:46,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:29:46,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 14:29:46,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:46,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:46,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:46,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:46,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:46,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:46,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:46,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:46,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:46,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:46,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:46,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:46,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-27 14:29:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:46,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:46,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:46,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:46,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:46,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:46,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:46,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:29:46,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:46,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:29:46,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:46,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-27 14:29:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:46,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:46,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:46,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:46,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:46,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:46,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:46,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:29:46,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:46,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:29:46,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 4 proven. 228 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2020-10-27 14:29:46,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076837616] [2020-10-27 14:29:46,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:46,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:29:46,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978466145] [2020-10-27 14:29:46,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:29:46,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:46,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:29:46,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:29:46,531 INFO L87 Difference]: Start difference. First operand 286 states and 369 transitions. Second operand 15 states. [2020-10-27 14:29:47,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:47,263 INFO L93 Difference]: Finished difference Result 322 states and 411 transitions. [2020-10-27 14:29:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:29:47,263 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 99 [2020-10-27 14:29:47,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:47,266 INFO L225 Difference]: With dead ends: 322 [2020-10-27 14:29:47,266 INFO L226 Difference]: Without dead ends: 318 [2020-10-27 14:29:47,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:29:47,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-27 14:29:47,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 233. [2020-10-27 14:29:47,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-27 14:29:47,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 298 transitions. [2020-10-27 14:29:47,300 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 298 transitions. Word has length 99 [2020-10-27 14:29:47,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:47,301 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 298 transitions. [2020-10-27 14:29:47,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:29:47,301 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 298 transitions. [2020-10-27 14:29:47,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 14:29:47,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:47,302 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 19, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:47,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 14:29:47,302 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:47,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:47,302 INFO L82 PathProgramCache]: Analyzing trace with hash -728977985, now seen corresponding path program 33 times [2020-10-27 14:29:47,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:47,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137060870] [2020-10-27 14:29:47,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:47,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:47,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:47,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:51,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:51,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 14:29:51,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:51,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4445 [2020-10-27 14:29:51,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:51,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:29:51,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:29:51,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 14:29:51,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:52,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:52,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:52,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:52,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:52,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:52,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:52,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:52,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:52,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:52,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:52,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:52,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-27 14:29:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:52,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:52,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:52,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:52,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:52,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:52,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:52,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:52,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-27 14:29:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:52,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:52,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:52,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:52,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:52,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:29:52,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:52,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:52,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:29:52,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:52,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 4 proven. 715 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:29:52,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137060870] [2020-10-27 14:29:52,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:52,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:29:52,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074610757] [2020-10-27 14:29:52,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:29:52,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:52,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:29:52,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:29:52,247 INFO L87 Difference]: Start difference. First operand 233 states and 298 transitions. Second operand 26 states. [2020-10-27 14:29:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:52,463 INFO L93 Difference]: Finished difference Result 290 states and 366 transitions. [2020-10-27 14:29:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:29:52,464 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 99 [2020-10-27 14:29:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:52,465 INFO L225 Difference]: With dead ends: 290 [2020-10-27 14:29:52,465 INFO L226 Difference]: Without dead ends: 248 [2020-10-27 14:29:52,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:29:52,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-27 14:29:52,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 242. [2020-10-27 14:29:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-27 14:29:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 310 transitions. [2020-10-27 14:29:52,493 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 310 transitions. Word has length 99 [2020-10-27 14:29:52,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:52,493 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 310 transitions. [2020-10-27 14:29:52,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:29:52,493 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 310 transitions. [2020-10-27 14:29:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 14:29:52,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:52,495 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 20, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:52,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 14:29:52,495 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:52,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:52,495 INFO L82 PathProgramCache]: Analyzing trace with hash -387258853, now seen corresponding path program 34 times [2020-10-27 14:29:52,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:52,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169325162] [2020-10-27 14:29:52,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:52,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:52,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:53,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:57,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:57,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 14:29:57,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:29:57,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4809 [2020-10-27 14:29:57,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:57,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:29:57,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:29:57,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 14:29:57,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:57,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:29:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:57,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:57,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:57,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:29:57,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:57,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:57,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:57,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:29:57,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:57,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:29:57,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:57,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-27 14:29:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:57,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:57,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:57,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:57,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:57,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:29:57,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:57,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:29:57,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:57,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:29:57,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:57,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-27 14:29:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:57,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:57,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:29:57,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:29:57,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:29:57,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:29:57,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:29:57,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:29:57,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:29:57,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:29:57,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:29:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 4 proven. 180 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2020-10-27 14:29:57,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169325162] [2020-10-27 14:29:57,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:29:57,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:29:57,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719676222] [2020-10-27 14:29:57,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:29:57,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:29:57,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:29:57,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:29:57,540 INFO L87 Difference]: Start difference. First operand 242 states and 310 transitions. Second operand 13 states. [2020-10-27 14:29:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:29:58,103 INFO L93 Difference]: Finished difference Result 267 states and 338 transitions. [2020-10-27 14:29:58,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:29:58,103 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 102 [2020-10-27 14:29:58,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:29:58,105 INFO L225 Difference]: With dead ends: 267 [2020-10-27 14:29:58,105 INFO L226 Difference]: Without dead ends: 263 [2020-10-27 14:29:58,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:29:58,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-27 14:29:58,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 183. [2020-10-27 14:29:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-27 14:29:58,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 231 transitions. [2020-10-27 14:29:58,133 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 231 transitions. Word has length 102 [2020-10-27 14:29:58,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:29:58,134 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 231 transitions. [2020-10-27 14:29:58,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:29:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 231 transitions. [2020-10-27 14:29:58,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 14:29:58,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:29:58,135 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:29:58,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 14:29:58,135 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:29:58,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:29:58,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2069323491, now seen corresponding path program 35 times [2020-10-27 14:29:58,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:29:58,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403661886] [2020-10-27 14:29:58,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:29:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:29:58,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:58,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:59,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:29:59,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:03,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:03,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 14:30:03,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:03,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:30:03,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:03,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:30:03,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:30:03,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 14:30:03,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:03,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:03,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:03,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:03,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:03,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:03,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:03,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:03,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:03,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:03,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:03,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:03,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-27 14:30:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:03,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:03,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:03,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:03,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:03,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:30:03,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:30:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:03,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:03,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-27 14:30:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:03,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:03,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:03,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:03,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:03,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:30:03,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:03,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:03,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:30:03,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:03,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 4 proven. 782 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:30:03,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403661886] [2020-10-27 14:30:03,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:03,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:30:03,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639554123] [2020-10-27 14:30:03,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:30:03,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:03,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:30:03,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:30:03,692 INFO L87 Difference]: Start difference. First operand 183 states and 231 transitions. Second operand 27 states. [2020-10-27 14:30:03,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:03,973 INFO L93 Difference]: Finished difference Result 235 states and 291 transitions. [2020-10-27 14:30:03,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:30:03,974 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2020-10-27 14:30:03,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:03,975 INFO L225 Difference]: With dead ends: 235 [2020-10-27 14:30:03,976 INFO L226 Difference]: Without dead ends: 193 [2020-10-27 14:30:03,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:30:03,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-27 14:30:03,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2020-10-27 14:30:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-27 14:30:03,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 239 transitions. [2020-10-27 14:30:03,999 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 239 transitions. Word has length 102 [2020-10-27 14:30:03,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:03,999 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 239 transitions. [2020-10-27 14:30:03,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:30:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 239 transitions. [2020-10-27 14:30:04,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 14:30:04,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:04,001 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:04,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 14:30:04,001 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:04,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:04,001 INFO L82 PathProgramCache]: Analyzing trace with hash 2062462075, now seen corresponding path program 36 times [2020-10-27 14:30:04,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:04,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916352088] [2020-10-27 14:30:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:04,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:04,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:05,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:06,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:09,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:09,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 14:30:09,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:09,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:30:09,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:09,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:30:09,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:30:09,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 14:30:09,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:09,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:09,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:09,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:09,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:09,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:09,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:30:09,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:09,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:09,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:09,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:09,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:09,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-27 14:30:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:09,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:09,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:09,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:09,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:09,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:30:09,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:09,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:30:09,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:09,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:30:09,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:09,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-27 14:30:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:09,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:09,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:09,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:09,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:09,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:30:09,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:09,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:30:09,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:09,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:30:09,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 6 proven. 189 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2020-10-27 14:30:09,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916352088] [2020-10-27 14:30:09,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:09,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:30:09,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925918127] [2020-10-27 14:30:09,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:30:09,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:09,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:30:09,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:30:09,485 INFO L87 Difference]: Start difference. First operand 189 states and 239 transitions. Second operand 18 states. [2020-10-27 14:30:10,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:10,412 INFO L93 Difference]: Finished difference Result 280 states and 357 transitions. [2020-10-27 14:30:10,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:30:10,412 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 105 [2020-10-27 14:30:10,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:10,414 INFO L225 Difference]: With dead ends: 280 [2020-10-27 14:30:10,414 INFO L226 Difference]: Without dead ends: 276 [2020-10-27 14:30:10,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:30:10,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-27 14:30:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 270. [2020-10-27 14:30:10,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-27 14:30:10,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 346 transitions. [2020-10-27 14:30:10,459 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 346 transitions. Word has length 105 [2020-10-27 14:30:10,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:10,459 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 346 transitions. [2020-10-27 14:30:10,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:30:10,460 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 346 transitions. [2020-10-27 14:30:10,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 14:30:10,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:10,461 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 22, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:10,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 14:30:10,461 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:10,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:10,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1178953085, now seen corresponding path program 37 times [2020-10-27 14:30:10,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:10,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220069719] [2020-10-27 14:30:10,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:10,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:10,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:11,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:12,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:15,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:15,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 14:30:15,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:15,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:30:15,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:15,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 14:30:15,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:30:15,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 14:30:15,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:18,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:18,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:18,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:18,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:18,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:18,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:18,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:18,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:18,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:18,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:18,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:18,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-27 14:30:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:18,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:18,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:18,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:18,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:18,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:18,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:18,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:30:18,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:18,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:30:18,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:18,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-27 14:30:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:18,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:18,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:18,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:18,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:18,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:18,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:18,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:30:18,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:18,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:30:18,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 676 proven. 188 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:30:18,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220069719] [2020-10-27 14:30:18,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:18,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 14:30:18,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429449700] [2020-10-27 14:30:18,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 14:30:18,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:18,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 14:30:18,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=2299, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 14:30:18,070 INFO L87 Difference]: Start difference. First operand 270 states and 346 transitions. Second operand 56 states. [2020-10-27 14:30:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:20,680 INFO L93 Difference]: Finished difference Result 3002 states and 3962 transitions. [2020-10-27 14:30:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 14:30:20,681 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 105 [2020-10-27 14:30:20,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:20,691 INFO L225 Difference]: With dead ends: 3002 [2020-10-27 14:30:20,691 INFO L226 Difference]: Without dead ends: 2998 [2020-10-27 14:30:20,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=951, Invalid=3339, Unknown=0, NotChecked=0, Total=4290 [2020-10-27 14:30:20,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2020-10-27 14:30:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 1610. [2020-10-27 14:30:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1610 states. [2020-10-27 14:30:20,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2146 transitions. [2020-10-27 14:30:20,895 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2146 transitions. Word has length 105 [2020-10-27 14:30:20,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:20,895 INFO L481 AbstractCegarLoop]: Abstraction has 1610 states and 2146 transitions. [2020-10-27 14:30:20,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 14:30:20,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2146 transitions. [2020-10-27 14:30:20,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 14:30:20,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:20,900 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:20,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 14:30:20,900 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:20,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:20,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1192786177, now seen corresponding path program 38 times [2020-10-27 14:30:20,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:20,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486268240] [2020-10-27 14:30:20,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:20,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:20,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:21,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:22,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:25,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:25,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 14:30:25,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:25,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:30:25,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:25,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:30:25,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:30:25,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 14:30:25,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:26,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:26,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:26,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:26,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:26,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:26,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:30:26,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:26,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:26,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:26,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:26,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:26,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-27 14:30:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:26,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:26,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:26,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:26,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:26,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:30:26,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:26,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:30:26,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:26,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:30:26,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:26,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-27 14:30:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:26,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:26,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:26,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:26,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:26,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:26,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:26,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:30:26,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:26,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:30:26,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 3 proven. 192 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2020-10-27 14:30:26,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486268240] [2020-10-27 14:30:26,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:26,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:30:26,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073157458] [2020-10-27 14:30:26,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:30:26,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:26,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:30:26,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:30:26,380 INFO L87 Difference]: Start difference. First operand 1610 states and 2146 transitions. Second operand 19 states. [2020-10-27 14:30:27,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:27,716 INFO L93 Difference]: Finished difference Result 2394 states and 3191 transitions. [2020-10-27 14:30:27,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:30:27,716 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 105 [2020-10-27 14:30:27,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:27,725 INFO L225 Difference]: With dead ends: 2394 [2020-10-27 14:30:27,725 INFO L226 Difference]: Without dead ends: 2390 [2020-10-27 14:30:27,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:30:27,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2020-10-27 14:30:27,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 1616. [2020-10-27 14:30:27,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1616 states. [2020-10-27 14:30:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2154 transitions. [2020-10-27 14:30:27,929 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2154 transitions. Word has length 105 [2020-10-27 14:30:27,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:27,929 INFO L481 AbstractCegarLoop]: Abstraction has 1616 states and 2154 transitions. [2020-10-27 14:30:27,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:30:27,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2154 transitions. [2020-10-27 14:30:27,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 14:30:27,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:27,935 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 20, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:27,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 14:30:27,935 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:27,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:27,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2045449917, now seen corresponding path program 39 times [2020-10-27 14:30:27,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:27,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531333979] [2020-10-27 14:30:27,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:27,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:27,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:28,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:32,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:32,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 14:30:32,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:32,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:30:32,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:32,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 14:30:32,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:30:32,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 14:30:32,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:35,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:35,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:35,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:35,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:35,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:35,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:35,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:35,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:35,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:35,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:35,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:35,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-27 14:30:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:35,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:35,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:35,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:35,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:35,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:35,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:35,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:30:35,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:35,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:30:35,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:35,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-27 14:30:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:35,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:35,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:35,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:30:35,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:35,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:30:35,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:35,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:30:35,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:35,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:30:35,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 654 proven. 208 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:30:35,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531333979] [2020-10-27 14:30:35,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:35,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 14:30:35,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227078166] [2020-10-27 14:30:35,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 14:30:35,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:35,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 14:30:35,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=715, Invalid=2147, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 14:30:35,488 INFO L87 Difference]: Start difference. First operand 1616 states and 2154 transitions. Second operand 54 states. [2020-10-27 14:30:38,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:38,224 INFO L93 Difference]: Finished difference Result 2966 states and 3913 transitions. [2020-10-27 14:30:38,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 14:30:38,225 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 105 [2020-10-27 14:30:38,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:38,236 INFO L225 Difference]: With dead ends: 2966 [2020-10-27 14:30:38,236 INFO L226 Difference]: Without dead ends: 2962 [2020-10-27 14:30:38,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=879, Invalid=3153, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 14:30:38,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2020-10-27 14:30:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 1606. [2020-10-27 14:30:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-10-27 14:30:38,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2140 transitions. [2020-10-27 14:30:38,434 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2140 transitions. Word has length 105 [2020-10-27 14:30:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:38,434 INFO L481 AbstractCegarLoop]: Abstraction has 1606 states and 2140 transitions. [2020-10-27 14:30:38,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 14:30:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2140 transitions. [2020-10-27 14:30:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 14:30:38,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:38,439 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 19, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:38,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 14:30:38,439 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:38,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:38,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2068082171, now seen corresponding path program 40 times [2020-10-27 14:30:38,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:38,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737325621] [2020-10-27 14:30:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:38,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:38,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:39,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking...