/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:09:54,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:09:54,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:09:54,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:09:54,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:09:54,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:09:54,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:09:54,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:09:54,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:09:54,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:09:54,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:09:54,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:09:54,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:09:54,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:09:54,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:09:54,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:09:54,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:09:54,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:09:54,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:09:54,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:09:54,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:09:54,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:09:54,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:09:54,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:09:54,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:09:54,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:09:54,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:09:54,126 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:09:54,127 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:09:54,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:09:54,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:09:54,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:09:54,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:09:54,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:09:54,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:09:54,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:09:54,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:09:54,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:09:54,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:09:54,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:09:54,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:09:54,140 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 [2020-10-26 19:09:54,170 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:09:54,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:09:54,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:09:54,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:09:54,173 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:09:54,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:09:54,174 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:09:54,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:09:54,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:09:54,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:09:54,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:09:54,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:09:54,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:09:54,176 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:09:54,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:09:54,176 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:09:54,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:09:54,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:09:54,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:09:54,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:09:54,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:09:54,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:09:54,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:09:54,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:09:54,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:09:54,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:09:54,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:09:54,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:09:54,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:09:54,180 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:09:54,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:09:54,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:09:54,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:09:54,695 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:09:54,696 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:09:54,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2020-10-26 19:09:54,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2be15751a/ffd8763fceff40999c255a7ae6b5220f/FLAG723f1892a [2020-10-26 19:09:55,520 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:09:55,521 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2020-10-26 19:09:55,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2be15751a/ffd8763fceff40999c255a7ae6b5220f/FLAG723f1892a [2020-10-26 19:09:55,866 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2be15751a/ffd8763fceff40999c255a7ae6b5220f [2020-10-26 19:09:55,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:09:55,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:09:55,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:09:55,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:09:55,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:09:55,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:09:55" (1/1) ... [2020-10-26 19:09:55,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@847d14f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:55, skipping insertion in model container [2020-10-26 19:09:55,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:09:55" (1/1) ... [2020-10-26 19:09:55,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:09:55,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:09:56,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:09:56,139 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:09:56,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:09:56,189 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:09:56,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:56 WrapperNode [2020-10-26 19:09:56,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:09:56,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:09:56,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:09:56,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:09:56,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:56" (1/1) ... [2020-10-26 19:09:56,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:56" (1/1) ... [2020-10-26 19:09:56,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:56" (1/1) ... [2020-10-26 19:09:56,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:56" (1/1) ... [2020-10-26 19:09:56,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:56" (1/1) ... [2020-10-26 19:09:56,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:56" (1/1) ... [2020-10-26 19:09:56,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:56" (1/1) ... [2020-10-26 19:09:56,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:09:56,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:09:56,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:09:56,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:09:56,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:56" (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 [2020-10-26 19:09:56,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:09:56,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:09:56,349 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:09:56,349 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:09:56,350 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:09:56,350 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:09:56,350 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:09:56,350 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:09:56,350 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:09:56,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:09:56,351 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:09:56,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:09:56,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-26 19:09:56,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:09:56,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:09:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:09:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:09:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:09:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:09:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:09:56,956 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:09:56,956 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-26 19:09:56,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:09:56 BoogieIcfgContainer [2020-10-26 19:09:56,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:09:56,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:09:56,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:09:56,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:09:56,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:09:55" (1/3) ... [2020-10-26 19:09:56,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@84b4bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:09:56, skipping insertion in model container [2020-10-26 19:09:56,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:56" (2/3) ... [2020-10-26 19:09:56,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@84b4bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:09:56, skipping insertion in model container [2020-10-26 19:09:56,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:09:56" (3/3) ... [2020-10-26 19:09:56,970 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2020-10-26 19:09:56,985 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:09:56,991 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:09:57,007 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:09:57,044 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:09:57,045 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:09:57,045 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:09:57,045 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:09:57,045 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:09:57,045 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:09:57,045 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:09:57,046 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:09:57,067 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-26 19:09:57,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:09:57,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:09:57,077 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, 1] [2020-10-26 19:09:57,077 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:09:57,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:09:57,087 INFO L82 PathProgramCache]: Analyzing trace with hash 994645046, now seen corresponding path program 1 times [2020-10-26 19:09:57,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:09:57,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453476901] [2020-10-26 19:09:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:09:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:57,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:57,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:57,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:57,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:57,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:57,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:58,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:58,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:09:58,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:09:58,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1442 [2020-10-26 19:09:58,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:58,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:09:58,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:09:58,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:09:58,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:09:58,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:09:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:58,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:58,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:58,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:09:58,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:09:58,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:09:58,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:58,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:09:58,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:09:58,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:09:58,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:09:58,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453476901] [2020-10-26 19:09:58,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:09:58,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 19:09:58,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978310249] [2020-10-26 19:09:59,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:09:59,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:09:59,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:09:59,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:09:59,025 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 6 states. [2020-10-26 19:09:59,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:09:59,356 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2020-10-26 19:09:59,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:09:59,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-26 19:09:59,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:09:59,368 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:09:59,368 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 19:09:59,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:09:59,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 19:09:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-26 19:09:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:09:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-26 19:09:59,422 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2020-10-26 19:09:59,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:09:59,423 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-26 19:09:59,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:09:59,423 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-26 19:09:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:09:59,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:09:59,424 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, 1, 1, 1] [2020-10-26 19:09:59,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:09:59,425 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:09:59,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:09:59,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2037849340, now seen corresponding path program 1 times [2020-10-26 19:09:59,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:09:59,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203171636] [2020-10-26 19:09:59,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:09:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:59,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:59,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:59,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:59,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:59,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:59,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:59,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:59,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:01,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:01,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:10:01,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:10:01,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2104 [2020-10-26 19:10:01,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:01,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:10:01,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:01,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:10:01,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:10:01,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:01,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:01,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:01,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:01,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:01,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:10:01,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:01,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:01,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:01,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:01,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:10:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:10:01,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203171636] [2020-10-26 19:10:01,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:10:01,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:10:01,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310383423] [2020-10-26 19:10:01,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:10:01,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:01,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:10:01,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:10:01,699 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2020-10-26 19:10:01,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:01,901 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-10-26 19:10:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:10:01,901 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-26 19:10:01,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:01,903 INFO L225 Difference]: With dead ends: 55 [2020-10-26 19:10:01,903 INFO L226 Difference]: Without dead ends: 35 [2020-10-26 19:10:01,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:10:01,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-26 19:10:01,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-10-26 19:10:01,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 19:10:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-26 19:10:01,931 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 23 [2020-10-26 19:10:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:01,933 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-26 19:10:01,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:10:01,933 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-26 19:10:01,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:10:01,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:01,935 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:01,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:10:01,936 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:01,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:01,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1372549430, now seen corresponding path program 1 times [2020-10-26 19:10:01,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:01,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702018890] [2020-10-26 19:10:01,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:01,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:02,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:02,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:02,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:02,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:03,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:03,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:03,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:03,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:04,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:05,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:06,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:06,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:10:06,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:10:06,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:10:06,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:06,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:10:06,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:06,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:10:06,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:07,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:07,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:07,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:07,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:07,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:07,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:10:07,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:07,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:07,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:07,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:07,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:10:07,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702018890] [2020-10-26 19:10:07,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:07,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:10:07,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782182748] [2020-10-26 19:10:07,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:10:07,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:07,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:10:07,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:10:07,585 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 16 states. [2020-10-26 19:10:08,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:08,367 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-10-26 19:10:08,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:10:08,368 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2020-10-26 19:10:08,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:08,369 INFO L225 Difference]: With dead ends: 55 [2020-10-26 19:10:08,369 INFO L226 Difference]: Without dead ends: 49 [2020-10-26 19:10:08,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:10:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-26 19:10:08,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-10-26 19:10:08,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:10:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-26 19:10:08,380 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 29 [2020-10-26 19:10:08,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:08,381 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-26 19:10:08,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:10:08,381 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-26 19:10:08,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:10:08,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:08,383 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:08,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:10:08,383 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:08,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:08,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1432826740, now seen corresponding path program 2 times [2020-10-26 19:10:08,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:08,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280726510] [2020-10-26 19:10:08,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:08,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:08,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:08,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:08,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:08,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:09,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:09,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:11,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:11,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:10:11,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:10:11,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2901 [2020-10-26 19:10:11,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:11,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:10:11,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:11,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:10:11,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:10:11,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:11,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:11,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:11,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:11,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:11,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:10:11,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:11,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:11,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:11,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:11,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:10:11,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280726510] [2020-10-26 19:10:11,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:11,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:10:11,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025366689] [2020-10-26 19:10:11,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:10:11,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:11,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:10:11,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:10:11,388 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 6 states. [2020-10-26 19:10:11,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:11,580 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2020-10-26 19:10:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:10:11,582 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-26 19:10:11,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:11,583 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:10:11,583 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:10:11,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:10:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:10:11,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-26 19:10:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:10:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-26 19:10:11,599 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 31 [2020-10-26 19:10:11,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:11,600 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-26 19:10:11,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:10:11,600 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-26 19:10:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:10:11,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:11,605 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:11,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:10:11,606 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:11,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:11,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1051640402, now seen corresponding path program 3 times [2020-10-26 19:10:11,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:11,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417866598] [2020-10-26 19:10:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:11,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:11,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:11,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:12,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:12,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:12,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:13,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:13,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:13,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:14,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:14,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:15,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:15,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:15,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:16,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:16,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:16,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:10:16,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-26 19:10:16,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:10:16,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:16,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:10:16,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:16,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:10:16,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:18,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:18,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:18,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:18,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:18,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:18,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 19:10:18,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:18,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:18,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:18,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:18,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:10:18,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417866598] [2020-10-26 19:10:18,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:18,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:10:18,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167175415] [2020-10-26 19:10:18,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:10:18,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:18,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:10:18,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:10:18,346 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 26 states. [2020-10-26 19:10:18,705 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-26 19:10:18,926 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-26 19:10:19,146 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-26 19:10:19,533 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-26 19:10:19,698 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-26 19:10:19,864 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-26 19:10:20,127 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-26 19:10:20,346 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-26 19:10:20,888 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-26 19:10:21,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:21,473 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2020-10-26 19:10:21,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:10:21,478 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 37 [2020-10-26 19:10:21,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:21,479 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:10:21,479 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:10:21,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:10:21,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:10:21,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2020-10-26 19:10:21,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:10:21,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-10-26 19:10:21,495 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 37 [2020-10-26 19:10:21,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:21,495 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-10-26 19:10:21,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:10:21,496 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-10-26 19:10:21,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:10:21,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:21,497 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2020-10-26 19:10:21,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:10:21,498 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:21,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:21,498 INFO L82 PathProgramCache]: Analyzing trace with hash 628182548, now seen corresponding path program 4 times [2020-10-26 19:10:21,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:21,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127691772] [2020-10-26 19:10:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:21,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:21,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:21,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:21,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:26,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:26,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:10:26,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:10:26,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:10:26,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:26,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:10:26,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:26,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:10:26,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:26,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:26,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:26,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:26,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:26,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:26,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:10:26,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:26,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:26,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:26,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:26,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 19:10:26,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127691772] [2020-10-26 19:10:26,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:10:26,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:10:26,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968967797] [2020-10-26 19:10:26,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:10:26,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:26,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:10:26,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:10:26,591 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 4 states. [2020-10-26 19:10:26,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:26,695 INFO L93 Difference]: Finished difference Result 105 states and 119 transitions. [2020-10-26 19:10:26,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:10:26,696 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-26 19:10:26,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:26,698 INFO L225 Difference]: With dead ends: 105 [2020-10-26 19:10:26,698 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:10:26,699 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 [2020-10-26 19:10:26,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:10:26,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-26 19:10:26,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:10:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-10-26 19:10:26,717 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 39 [2020-10-26 19:10:26,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:26,717 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-10-26 19:10:26,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:10:26,718 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-10-26 19:10:26,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:10:26,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:26,723 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1] [2020-10-26 19:10:26,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:10:26,724 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:26,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:26,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1588807530, now seen corresponding path program 1 times [2020-10-26 19:10:26,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:26,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656751861] [2020-10-26 19:10:26,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:26,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:26,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:26,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:26,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:31,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:31,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:10:31,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:10:31,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:10:31,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:31,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:10:31,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:31,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:10:31,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:31,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:31,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:31,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:31,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:31,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:31,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:10:31,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:31,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:31,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:31,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:31,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 19:10:31,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656751861] [2020-10-26 19:10:31,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:31,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:10:31,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468755916] [2020-10-26 19:10:31,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:10:31,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:31,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:10:31,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:10:31,826 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 5 states. [2020-10-26 19:10:31,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:31,940 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2020-10-26 19:10:31,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:10:31,941 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-10-26 19:10:31,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:31,943 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:10:31,943 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:10:31,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:10:31,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:10:31,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-26 19:10:31,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:10:31,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-26 19:10:31,954 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 41 [2020-10-26 19:10:31,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:31,954 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-26 19:10:31,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:10:31,955 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-26 19:10:31,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:10:31,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:31,956 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:31,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:10:31,956 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:31,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:31,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1812493672, now seen corresponding path program 2 times [2020-10-26 19:10:31,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:31,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193521672] [2020-10-26 19:10:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:31,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:31,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:32,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:32,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:36,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:36,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:10:36,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:10:36,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:10:36,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:36,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:10:36,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:36,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:10:36,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:37,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:37,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:37,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:37,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:37,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:37,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:10:37,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:37,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:37,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:37,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:37,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:10:37,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193521672] [2020-10-26 19:10:37,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:37,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:10:37,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824445975] [2020-10-26 19:10:37,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:10:37,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:37,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:10:37,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:10:37,096 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 10 states. [2020-10-26 19:10:37,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:37,442 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2020-10-26 19:10:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:10:37,442 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-26 19:10:37,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:37,444 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:10:37,444 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:10:37,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:10:37,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:10:37,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-26 19:10:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:10:37,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-10-26 19:10:37,466 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 43 [2020-10-26 19:10:37,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:37,467 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-10-26 19:10:37,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:10:37,470 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-10-26 19:10:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:10:37,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:37,471 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1] [2020-10-26 19:10:37,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:10:37,471 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:37,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:37,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2026511334, now seen corresponding path program 3 times [2020-10-26 19:10:37,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:37,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210730954] [2020-10-26 19:10:37,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:37,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:37,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:37,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:37,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:38,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:39,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:42,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:42,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:10:42,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:10:42,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:10:42,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:42,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:10:42,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:42,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:10:42,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:42,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:42,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:42,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:42,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:42,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:42,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:10:42,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:42,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:42,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:42,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:42,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 19:10:42,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210730954] [2020-10-26 19:10:42,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:42,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:10:42,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106271437] [2020-10-26 19:10:42,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:10:42,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:42,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:10:42,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:10:42,621 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 10 states. [2020-10-26 19:10:42,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:42,961 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-26 19:10:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:10:42,962 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-26 19:10:42,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:42,963 INFO L225 Difference]: With dead ends: 87 [2020-10-26 19:10:42,963 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:10:42,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:10:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:10:42,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-26 19:10:42,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:10:42,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-26 19:10:42,984 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 45 [2020-10-26 19:10:42,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:42,984 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-26 19:10:42,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:10:42,985 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-26 19:10:42,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:10:42,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:42,989 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:42,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:10:42,989 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:42,990 INFO L82 PathProgramCache]: Analyzing trace with hash -491190432, now seen corresponding path program 4 times [2020-10-26 19:10:42,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:42,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772595803] [2020-10-26 19:10:42,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:43,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:43,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:43,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:44,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:44,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:45,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:45,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:46,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:46,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:46,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:47,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:47,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:47,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:48,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:48,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:10:48,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:10:48,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:10:48,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:48,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:10:48,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:48,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 19:10:48,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:49,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:49,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:49,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:49,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:49,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:49,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:10:49,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:49,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:49,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:49,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:49,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:10:49,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772595803] [2020-10-26 19:10:49,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:49,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:10:49,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467229223] [2020-10-26 19:10:49,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:10:49,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:49,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:10:49,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=862, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:10:49,466 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 31 states. [2020-10-26 19:10:51,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:51,909 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-10-26 19:10:51,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:10:51,910 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 51 [2020-10-26 19:10:51,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:51,911 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:10:51,911 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:10:51,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=160, Invalid=2002, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:10:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:10:51,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-10-26 19:10:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:10:51,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2020-10-26 19:10:51,941 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 51 [2020-10-26 19:10:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:51,942 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2020-10-26 19:10:51,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:10:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2020-10-26 19:10:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:10:51,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:51,946 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:51,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:10:51,947 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:51,947 INFO L82 PathProgramCache]: Analyzing trace with hash 521377698, now seen corresponding path program 5 times [2020-10-26 19:10:51,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:51,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439565500] [2020-10-26 19:10:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:51,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:52,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:52,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:52,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:56,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:56,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:10:56,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:10:56,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:10:56,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:56,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:10:56,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:56,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:10:56,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:57,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:57,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:57,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:57,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:57,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:57,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:10:57,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:57,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:57,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:57,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:57,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 19:10:57,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439565500] [2020-10-26 19:10:57,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:57,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:10:57,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126773255] [2020-10-26 19:10:57,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:10:57,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:57,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:10:57,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:10:57,121 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 12 states. [2020-10-26 19:10:57,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:57,572 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2020-10-26 19:10:57,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:10:57,573 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-26 19:10:57,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:57,575 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:10:57,575 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:10:57,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:10:57,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:10:57,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-26 19:10:57,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:10:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2020-10-26 19:10:57,588 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 53 [2020-10-26 19:10:57,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:57,588 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2020-10-26 19:10:57,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:10:57,588 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2020-10-26 19:10:57,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:10:57,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:57,589 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:57,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:10:57,590 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:57,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:57,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1155959132, now seen corresponding path program 6 times [2020-10-26 19:10:57,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:57,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348395156] [2020-10-26 19:10:57,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:57,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:57,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:57,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:58,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:58,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:58,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:02,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:02,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:11:02,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:11:02,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:11:02,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:02,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:11:02,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:11:02,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:11:02,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:02,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:02,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:02,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:02,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:02,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:02,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:11:02,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:02,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:02,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:02,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:02,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-26 19:11:02,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348395156] [2020-10-26 19:11:02,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:02,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:11:02,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558007929] [2020-10-26 19:11:02,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:11:02,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:02,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:11:02,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:11:02,751 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 12 states. [2020-10-26 19:11:03,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:03,182 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2020-10-26 19:11:03,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:11:03,183 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-26 19:11:03,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:03,184 INFO L225 Difference]: With dead ends: 105 [2020-10-26 19:11:03,184 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:11:03,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:11:03,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:11:03,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-26 19:11:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:11:03,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-26 19:11:03,196 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 55 [2020-10-26 19:11:03,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:03,196 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-26 19:11:03,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:11:03,196 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-26 19:11:03,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:11:03,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:03,197 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:03,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:11:03,197 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:03,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:03,198 INFO L82 PathProgramCache]: Analyzing trace with hash 370973290, now seen corresponding path program 7 times [2020-10-26 19:11:03,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:03,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576460563] [2020-10-26 19:11:03,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:03,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:03,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:04,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:04,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:05,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:06,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:06,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:07,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:07,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:07,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:08,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:08,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:08,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:11:08,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:11:08,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5117 [2020-10-26 19:11:08,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:08,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:11:08,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:11:08,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-26 19:11:08,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:12,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:12,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:12,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:12,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:12,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:12,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:11:12,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:12,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:12,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:12,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:12,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:11:12,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576460563] [2020-10-26 19:11:12,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:12,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:11:12,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810385969] [2020-10-26 19:11:12,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:11:12,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:12,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:11:12,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:11:12,152 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 44 states. [2020-10-26 19:11:13,888 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-26 19:11:14,343 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-26 19:11:14,718 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-26 19:11:15,109 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2020-10-26 19:11:15,535 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 43 [2020-10-26 19:11:17,860 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 64 [2020-10-26 19:11:18,839 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-26 19:11:21,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:21,890 INFO L93 Difference]: Finished difference Result 136 states and 148 transitions. [2020-10-26 19:11:21,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-26 19:11:21,891 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 61 [2020-10-26 19:11:21,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:21,894 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:11:21,894 INFO L226 Difference]: Without dead ends: 130 [2020-10-26 19:11:21,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=599, Invalid=8331, Unknown=0, NotChecked=0, Total=8930 [2020-10-26 19:11:21,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-26 19:11:21,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 97. [2020-10-26 19:11:21,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:11:21,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2020-10-26 19:11:21,911 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 61 [2020-10-26 19:11:21,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:21,912 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2020-10-26 19:11:21,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:11:21,912 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2020-10-26 19:11:21,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:11:21,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:21,913 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:21,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:11:21,914 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:21,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:21,914 INFO L82 PathProgramCache]: Analyzing trace with hash -974151636, now seen corresponding path program 8 times [2020-10-26 19:11:21,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:21,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104516901] [2020-10-26 19:11:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:21,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:21,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:22,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:23,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:26,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:26,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:11:26,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:11:26,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:11:26,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:26,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:11:26,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:11:26,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:11:26,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:27,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:27,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:27,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:27,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:27,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:27,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:11:27,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:27,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:27,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:27,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:27,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:11:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:11:27,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104516901] [2020-10-26 19:11:27,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:27,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:11:27,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097350978] [2020-10-26 19:11:27,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:11:27,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:27,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:11:27,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:11:27,170 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand 14 states. [2020-10-26 19:11:27,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:27,882 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2020-10-26 19:11:27,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:11:27,883 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-26 19:11:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:27,884 INFO L225 Difference]: With dead ends: 158 [2020-10-26 19:11:27,884 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:11:27,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:11:27,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:11:27,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-26 19:11:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:11:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-26 19:11:27,894 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 63 [2020-10-26 19:11:27,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:27,896 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-26 19:11:27,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:11:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-26 19:11:27,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:11:27,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:27,897 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:27,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:11:27,898 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:27,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:27,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1571006612, now seen corresponding path program 9 times [2020-10-26 19:11:27,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:27,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321627604] [2020-10-26 19:11:27,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:27,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:27,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:28,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:28,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:32,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:32,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:11:32,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:11:32,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:11:32,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:32,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:11:32,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:11:32,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:11:32,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:33,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:33,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:33,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:33,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:33,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:33,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:11:33,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:33,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:33,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:33,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:33,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:11:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-26 19:11:33,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321627604] [2020-10-26 19:11:33,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:33,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:11:33,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693968032] [2020-10-26 19:11:33,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:11:33,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:33,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:11:33,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:11:33,178 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 14 states. [2020-10-26 19:11:33,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:33,749 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2020-10-26 19:11:33,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:11:33,750 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-26 19:11:33,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:33,751 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:11:33,751 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:11:33,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:11:33,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:11:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-26 19:11:33,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:11:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-26 19:11:33,763 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 63 [2020-10-26 19:11:33,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:33,763 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-26 19:11:33,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:11:33,764 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-26 19:11:33,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:11:33,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:33,772 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:33,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:11:33,772 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:33,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1467438860, now seen corresponding path program 10 times [2020-10-26 19:11:33,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:33,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299293465] [2020-10-26 19:11:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:33,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:34,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:35,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:36,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:37,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:37,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:38,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:38,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:11:38,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:11:38,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:11:38,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:38,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-26 19:11:38,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:11:38,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 19:11:38,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:44,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:44,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:44,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:44,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:44,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:44,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:11:44,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:44,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:44,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:44,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:44,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:11:44,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299293465] [2020-10-26 19:11:44,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:44,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-26 19:11:44,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860461722] [2020-10-26 19:11:44,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-26 19:11:44,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:44,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-26 19:11:44,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2721, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:11:44,337 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 54 states. [2020-10-26 19:11:46,324 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-26 19:11:46,975 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-26 19:11:47,994 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-26 19:11:48,338 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-26 19:11:48,699 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 19:11:49,187 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2020-10-26 19:11:49,559 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-26 19:11:49,889 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-26 19:11:50,543 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2020-10-26 19:11:51,061 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-26 19:11:51,389 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-26 19:11:52,233 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-26 19:11:52,757 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-26 19:11:54,295 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-26 19:11:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:54,892 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2020-10-26 19:11:54,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-26 19:11:54,895 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 71 [2020-10-26 19:11:54,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:54,896 INFO L225 Difference]: With dead ends: 131 [2020-10-26 19:11:54,896 INFO L226 Difference]: Without dead ends: 125 [2020-10-26 19:11:54,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=371, Invalid=7285, Unknown=0, NotChecked=0, Total=7656 [2020-10-26 19:11:54,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-26 19:11:54,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2020-10-26 19:11:54,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 19:11:54,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2020-10-26 19:11:54,914 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 71 [2020-10-26 19:11:54,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:54,915 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2020-10-26 19:11:54,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-26 19:11:54,915 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2020-10-26 19:11:54,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:11:54,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:54,916 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:54,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:11:54,916 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:54,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:54,917 INFO L82 PathProgramCache]: Analyzing trace with hash -341883850, now seen corresponding path program 11 times [2020-10-26 19:11:54,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:54,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361723918] [2020-10-26 19:11:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:54,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:54,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:55,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:56,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:59,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:59,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:11:59,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:11:59,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:11:59,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:59,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:11:59,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:11:59,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:11:59,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:00,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:00,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:00,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:00,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:00,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:00,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:12:00,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:00,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:00,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:00,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:00,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-26 19:12:00,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361723918] [2020-10-26 19:12:00,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:00,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:12:00,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334738751] [2020-10-26 19:12:00,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:12:00,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:00,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:12:00,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:12:00,243 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 16 states. [2020-10-26 19:12:01,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:01,239 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2020-10-26 19:12:01,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:12:01,240 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-26 19:12:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:01,242 INFO L225 Difference]: With dead ends: 167 [2020-10-26 19:12:01,242 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:12:01,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:12:01,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:12:01,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-26 19:12:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:12:01,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-26 19:12:01,251 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 73 [2020-10-26 19:12:01,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:01,251 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-26 19:12:01,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:12:01,252 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-26 19:12:01,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:12:01,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:01,253 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:12:01,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:12:01,253 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:01,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:01,254 INFO L82 PathProgramCache]: Analyzing trace with hash 868846454, now seen corresponding path program 12 times [2020-10-26 19:12:01,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:01,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868583805] [2020-10-26 19:12:01,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:01,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:01,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:01,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:02,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:06,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:06,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:12:06,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:12:06,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:12:06,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:06,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:12:06,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:12:06,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:12:06,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:06,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:06,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:06,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:06,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:06,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:06,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:12:06,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:06,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:06,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:06,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:06,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-26 19:12:06,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868583805] [2020-10-26 19:12:06,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:06,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:12:06,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81609077] [2020-10-26 19:12:06,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:12:06,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:06,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:12:06,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:12:06,611 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 16 states. [2020-10-26 19:12:07,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:07,465 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-10-26 19:12:07,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:12:07,466 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-26 19:12:07,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:07,467 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:12:07,468 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:12:07,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:12:07,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:12:07,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-26 19:12:07,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:12:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-26 19:12:07,483 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 73 [2020-10-26 19:12:07,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:07,484 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-26 19:12:07,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:12:07,484 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-26 19:12:07,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:12:07,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:07,485 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:12:07,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:12:07,485 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:07,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:07,486 INFO L82 PathProgramCache]: Analyzing trace with hash -2140089602, now seen corresponding path program 13 times [2020-10-26 19:12:07,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:07,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711523007] [2020-10-26 19:12:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:07,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:08,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:09,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:11,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:12,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:13,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:13,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:12:13,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:12:13,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5539 [2020-10-26 19:12:13,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:13,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-26 19:12:13,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:12:13,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 19:12:13,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:22,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:22,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:22,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:22,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:22,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:22,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:12:22,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:22,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:22,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:22,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:22,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:12:22,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711523007] [2020-10-26 19:12:22,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:22,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-26 19:12:22,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200610991] [2020-10-26 19:12:22,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-26 19:12:22,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:22,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-26 19:12:22,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:12:22,757 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 63 states. [2020-10-26 19:12:23,857 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-26 19:12:24,284 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-26 19:12:24,990 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-26 19:12:25,439 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-26 19:12:25,830 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-10-26 19:12:26,530 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-26 19:12:26,994 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-26 19:12:27,524 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-26 19:12:27,948 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-26 19:12:28,688 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-26 19:12:29,059 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-26 19:12:30,462 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-10-26 19:12:30,973 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-26 19:12:31,385 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-26 19:12:31,970 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-26 19:12:32,321 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-26 19:12:33,476 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2020-10-26 19:12:34,157 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-10-26 19:12:34,706 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-10-26 19:12:35,048 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 19:12:38,418 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-26 19:12:39,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:39,268 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2020-10-26 19:12:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-26 19:12:39,270 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 81 [2020-10-26 19:12:39,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:39,272 INFO L225 Difference]: With dead ends: 152 [2020-10-26 19:12:39,273 INFO L226 Difference]: Without dead ends: 146 [2020-10-26 19:12:39,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=622, Invalid=8884, Unknown=0, NotChecked=0, Total=9506 [2020-10-26 19:12:39,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-26 19:12:39,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 129. [2020-10-26 19:12:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-26 19:12:39,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 137 transitions. [2020-10-26 19:12:39,293 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 137 transitions. Word has length 81 [2020-10-26 19:12:39,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:39,293 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 137 transitions. [2020-10-26 19:12:39,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-26 19:12:39,294 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 137 transitions. [2020-10-26 19:12:39,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:12:39,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:39,295 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:12:39,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:12:39,295 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:39,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:39,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1725029440, now seen corresponding path program 14 times [2020-10-26 19:12:39,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:39,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733826131] [2020-10-26 19:12:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:39,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:39,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:39,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:41,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:44,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:44,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:12:44,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:12:44,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:12:44,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:44,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:12:44,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:12:44,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:12:44,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:44,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:44,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:44,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:44,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:44,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:44,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:12:44,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:44,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:44,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:44,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:44,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:44,703 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-26 19:12:44,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733826131] [2020-10-26 19:12:44,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:44,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:12:44,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493391586] [2020-10-26 19:12:44,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:12:44,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:44,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:12:44,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:12:44,706 INFO L87 Difference]: Start difference. First operand 129 states and 137 transitions. Second operand 18 states. [2020-10-26 19:12:46,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:46,253 INFO L93 Difference]: Finished difference Result 191 states and 202 transitions. [2020-10-26 19:12:46,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:12:46,254 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2020-10-26 19:12:46,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:46,256 INFO L225 Difference]: With dead ends: 191 [2020-10-26 19:12:46,256 INFO L226 Difference]: Without dead ends: 85 [2020-10-26 19:12:46,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:12:46,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-26 19:12:46,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-26 19:12:46,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:12:46,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-10-26 19:12:46,268 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 83 [2020-10-26 19:12:46,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:46,269 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-10-26 19:12:46,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:12:46,269 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-10-26 19:12:46,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:12:46,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:46,271 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:12:46,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:12:46,271 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:46,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:46,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2107767552, now seen corresponding path program 15 times [2020-10-26 19:12:46,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:46,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371576840] [2020-10-26 19:12:46,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:46,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:46,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:46,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:48,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:51,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:51,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:12:51,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:12:51,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:12:51,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:51,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:12:51,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:12:51,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:12:51,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:51,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:51,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:51,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:51,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:51,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:51,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:12:51,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:51,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:51,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:51,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:51,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-26 19:12:51,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371576840] [2020-10-26 19:12:51,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:51,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:12:51,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226640649] [2020-10-26 19:12:51,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:12:51,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:51,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:12:51,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:12:51,685 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 18 states. [2020-10-26 19:12:52,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:52,997 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-10-26 19:12:52,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:12:52,999 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2020-10-26 19:12:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:53,000 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:12:53,000 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:12:53,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:12:53,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:12:53,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-26 19:12:53,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:12:53,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-10-26 19:12:53,014 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 83 [2020-10-26 19:12:53,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:53,015 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-10-26 19:12:53,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:12:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-10-26 19:12:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:12:53,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:53,016 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:12:53,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:12:53,017 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:53,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1916844168, now seen corresponding path program 16 times [2020-10-26 19:12:53,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:53,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326273989] [2020-10-26 19:12:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:53,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:54,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:56,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:58,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:58,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:12:58,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:12:58,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:12:58,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:58,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-26 19:12:58,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:12:58,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 19:12:58,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:59,730 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-26 19:13:09,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:09,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:09,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:09,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:09,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:09,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:13:09,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:09,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:09,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:09,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:09,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-26 19:13:09,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326273989] [2020-10-26 19:13:09,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:09,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-26 19:13:09,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937369627] [2020-10-26 19:13:09,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-26 19:13:09,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:09,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-26 19:13:09,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=3534, Unknown=0, NotChecked=0, Total=3660 [2020-10-26 19:13:09,294 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 61 states. [2020-10-26 19:13:18,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:18,086 INFO L93 Difference]: Finished difference Result 148 states and 155 transitions. [2020-10-26 19:13:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-26 19:13:18,091 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 91 [2020-10-26 19:13:18,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:18,092 INFO L225 Difference]: With dead ends: 148 [2020-10-26 19:13:18,092 INFO L226 Difference]: Without dead ends: 142 [2020-10-26 19:13:18,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=136, Invalid=3770, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:13:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-26 19:13:18,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 129. [2020-10-26 19:13:18,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-26 19:13:18,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 136 transitions. [2020-10-26 19:13:18,112 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 136 transitions. Word has length 91 [2020-10-26 19:13:18,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:18,113 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 136 transitions. [2020-10-26 19:13:18,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-26 19:13:18,113 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 136 transitions. [2020-10-26 19:13:18,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:13:18,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:18,114 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:18,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:13:18,115 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:18,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:18,115 INFO L82 PathProgramCache]: Analyzing trace with hash -408953142, now seen corresponding path program 17 times [2020-10-26 19:13:18,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:18,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386640429] [2020-10-26 19:13:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:18,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:18,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:18,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:23,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:23,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:13:23,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:13:23,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:13:23,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:23,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:13:23,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:13:23,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:13:23,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:23,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:23,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:23,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:23,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:23,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:23,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:23,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:23,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:23,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:23,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:23,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-26 19:13:23,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386640429] [2020-10-26 19:13:23,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:23,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:13:23,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839012203] [2020-10-26 19:13:23,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:13:23,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:23,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:13:23,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:13:23,698 INFO L87 Difference]: Start difference. First operand 129 states and 136 transitions. Second operand 20 states. [2020-10-26 19:13:25,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:25,419 INFO L93 Difference]: Finished difference Result 252 states and 266 transitions. [2020-10-26 19:13:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:13:25,421 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-10-26 19:13:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:25,422 INFO L225 Difference]: With dead ends: 252 [2020-10-26 19:13:25,423 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:13:25,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:13:25,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:13:25,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-26 19:13:25,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-26 19:13:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 138 transitions. [2020-10-26 19:13:25,441 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 138 transitions. Word has length 93 [2020-10-26 19:13:25,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:25,441 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 138 transitions. [2020-10-26 19:13:25,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:13:25,442 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 138 transitions. [2020-10-26 19:13:25,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 19:13:25,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:25,443 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:25,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:13:25,443 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:25,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:25,444 INFO L82 PathProgramCache]: Analyzing trace with hash -111471668, now seen corresponding path program 18 times [2020-10-26 19:13:25,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:25,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622306771] [2020-10-26 19:13:25,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:25,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:25,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:25,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:30,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:30,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:30,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:13:30,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:13:30,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:13:30,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:30,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:13:30,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:13:30,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:13:30,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:30,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:30,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:30,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:30,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:30,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:30,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:13:30,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:30,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:30,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:30,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:30,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-26 19:13:30,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622306771] [2020-10-26 19:13:30,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:30,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:13:30,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462989059] [2020-10-26 19:13:30,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:13:30,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:30,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:13:30,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:13:30,970 INFO L87 Difference]: Start difference. First operand 131 states and 138 transitions. Second operand 20 states. [2020-10-26 19:13:32,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:32,442 INFO L93 Difference]: Finished difference Result 177 states and 189 transitions. [2020-10-26 19:13:32,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:13:32,443 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 95 [2020-10-26 19:13:32,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:32,455 INFO L225 Difference]: With dead ends: 177 [2020-10-26 19:13:32,455 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:13:32,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:13:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:13:32,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-26 19:13:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:13:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-26 19:13:32,467 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 95 [2020-10-26 19:13:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:32,467 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-26 19:13:32,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:13:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-26 19:13:32,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:13:32,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:32,469 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:32,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:13:32,470 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:32,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:32,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1436812910, now seen corresponding path program 19 times [2020-10-26 19:13:32,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:32,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953334279] [2020-10-26 19:13:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:32,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:33,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking...