/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/eca-rers2012/Problem11_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:45:23,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:45:23,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:45:23,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:45:23,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:45:23,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:45:23,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:45:23,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:45:23,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:45:23,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:45:23,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:45:23,097 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:45:23,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:45:23,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:45:23,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:45:23,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:45:23,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:45:23,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:45:23,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:45:23,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:45:23,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:45:23,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:45:23,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:45:23,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:45:23,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:45:23,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:45:23,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:45:23,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:45:23,131 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:45:23,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:45:23,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:45:23,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:45:23,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:45:23,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:45:23,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:45:23,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:45:23,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:45:23,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:45:23,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:45:23,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:45:23,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:45:23,141 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 22:45:23,171 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:45:23,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:45:23,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:45:23,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:45:23,173 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:45:23,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:45:23,174 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:45:23,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:45:23,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:45:23,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:45:23,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:45:23,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:45:23,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:45:23,175 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:45:23,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:45:23,176 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:45:23,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:45:23,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:45:23,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:45:23,176 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:45:23,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:45:23,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:45:23,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:45:23,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:45:23,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:45:23,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:45:23,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:45:23,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:45:23,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:45:23,178 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:45:23,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:45:23,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:45:23,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:45:23,592 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:45:23,593 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:45:23,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label57.c [2020-10-26 22:45:23,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a7068290f/808dbb9eb0b14d15a08c9a2927d4b808/FLAGc4fdca966 [2020-10-26 22:45:24,464 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:45:24,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem11_label57.c [2020-10-26 22:45:24,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a7068290f/808dbb9eb0b14d15a08c9a2927d4b808/FLAGc4fdca966 [2020-10-26 22:45:24,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a7068290f/808dbb9eb0b14d15a08c9a2927d4b808 [2020-10-26 22:45:24,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:45:24,691 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:45:24,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:45:24,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:45:24,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:45:24,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:45:24" (1/1) ... [2020-10-26 22:45:24,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@104476a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:45:24, skipping insertion in model container [2020-10-26 22:45:24,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:45:24" (1/1) ... [2020-10-26 22:45:24,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:45:24,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:45:25,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:45:25,503 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:45:25,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:45:25,749 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:45:25,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:45:25 WrapperNode [2020-10-26 22:45:25,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:45:25,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:45:25,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:45:25,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:45:25,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:45:25" (1/1) ... [2020-10-26 22:45:25,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:45:25" (1/1) ... [2020-10-26 22:45:25,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:45:25" (1/1) ... [2020-10-26 22:45:25,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:45:25" (1/1) ... [2020-10-26 22:45:25,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:45:25" (1/1) ... [2020-10-26 22:45:25,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:45:25" (1/1) ... [2020-10-26 22:45:25,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:45:25" (1/1) ... [2020-10-26 22:45:25,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:45:25,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:45:25,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:45:25,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:45:25,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:45:25" (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 22:45:26,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:45:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:45:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:45:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:45:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:45:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:45:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:45:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:45:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:45:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:45:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:45:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:45:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:45:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:45:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:45:26,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:45:26,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:45:26,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:45:26,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:45:28,351 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:45:28,352 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:45:28,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:45:28 BoogieIcfgContainer [2020-10-26 22:45:28,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:45:28,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:45:28,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:45:28,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:45:28,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:45:24" (1/3) ... [2020-10-26 22:45:28,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b80d1ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:45:28, skipping insertion in model container [2020-10-26 22:45:28,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:45:25" (2/3) ... [2020-10-26 22:45:28,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b80d1ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:45:28, skipping insertion in model container [2020-10-26 22:45:28,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:45:28" (3/3) ... [2020-10-26 22:45:28,364 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label57.c [2020-10-26 22:45:28,377 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:45:28,383 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:45:28,396 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:45:28,426 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:45:28,427 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:45:28,427 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:45:28,427 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:45:28,427 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:45:28,427 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:45:28,427 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:45:28,428 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:45:28,453 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states. [2020-10-26 22:45:28,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 22:45:28,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:45:28,463 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, 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 22:45:28,463 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:45:28,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:45:28,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1488738090, now seen corresponding path program 1 times [2020-10-26 22:45:28,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:45:28,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644041835] [2020-10-26 22:45:28,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:45:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:45:28,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:29,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:45:29,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 22:45:29,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:45:29,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-10-26 22:45:29,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:45:29,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:45:29,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:45:29,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 22:45:29,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:45:29,641 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 22:45:29,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:45:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:45:29,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:29,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:45:29,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:45:29,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:45:29,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 22:45:29,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:45:29,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:45:29,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:45:29,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:45:29,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:45:29,769 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 22:45:29,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644041835] [2020-10-26 22:45:29,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:45:29,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 22:45:29,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500061300] [2020-10-26 22:45:29,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:45:29,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:45:29,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:45:29,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:45:29,802 INFO L87 Difference]: Start difference. First operand 296 states. Second operand 5 states. [2020-10-26 22:45:29,965 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 22:45:34,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:45:34,518 INFO L93 Difference]: Finished difference Result 997 states and 1783 transitions. [2020-10-26 22:45:34,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:45:34,520 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-10-26 22:45:34,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:45:34,541 INFO L225 Difference]: With dead ends: 997 [2020-10-26 22:45:34,542 INFO L226 Difference]: Without dead ends: 631 [2020-10-26 22:45:34,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:45:34,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-10-26 22:45:34,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 625. [2020-10-26 22:45:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2020-10-26 22:45:34,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 865 transitions. [2020-10-26 22:45:34,707 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 865 transitions. Word has length 53 [2020-10-26 22:45:34,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:45:34,707 INFO L481 AbstractCegarLoop]: Abstraction has 625 states and 865 transitions. [2020-10-26 22:45:34,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:45:34,708 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 865 transitions. [2020-10-26 22:45:34,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-26 22:45:34,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:45:34,718 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:45:34,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:45:34,719 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:45:34,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:45:34,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1725347365, now seen corresponding path program 1 times [2020-10-26 22:45:34,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:45:34,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400668773] [2020-10-26 22:45:34,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:45:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:45:34,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:34,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:36,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:36,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:45:36,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-26 22:45:36,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:45:36,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1972 [2020-10-26 22:45:36,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:45:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:45:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:45:36,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 22:45:36,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:45:36,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:45:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:45:36,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:36,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:45:36,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:45:36,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:45:36,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 22:45:36,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:45:36,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:45:36,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:45:36,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:45:36,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:45:36,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:45:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:45:36,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:37,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:45:37,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 22:45:37,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:45:37,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-26 22:45:37,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:45:37,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:45:37,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:45:37,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 22:45:37,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:45:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:45:37,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400668773] [2020-10-26 22:45:37,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:45:37,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:45:37,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241900688] [2020-10-26 22:45:37,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:45:37,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:45:37,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:45:37,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:45:37,270 INFO L87 Difference]: Start difference. First operand 625 states and 865 transitions. Second operand 7 states. [2020-10-26 22:45:40,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:45:40,572 INFO L93 Difference]: Finished difference Result 1873 states and 2658 transitions. [2020-10-26 22:45:40,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:45:40,573 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-10-26 22:45:40,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:45:40,585 INFO L225 Difference]: With dead ends: 1873 [2020-10-26 22:45:40,585 INFO L226 Difference]: Without dead ends: 1254 [2020-10-26 22:45:40,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:45:40,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2020-10-26 22:45:40,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1216. [2020-10-26 22:45:40,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1216 states. [2020-10-26 22:45:40,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1619 transitions. [2020-10-26 22:45:40,685 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1619 transitions. Word has length 125 [2020-10-26 22:45:40,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:45:40,688 INFO L481 AbstractCegarLoop]: Abstraction has 1216 states and 1619 transitions. [2020-10-26 22:45:40,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:45:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1619 transitions. [2020-10-26 22:45:40,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-26 22:45:40,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:45:40,701 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:45:40,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:45:40,702 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:45:40,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:45:40,703 INFO L82 PathProgramCache]: Analyzing trace with hash 754944159, now seen corresponding path program 1 times [2020-10-26 22:45:40,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:45:40,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006292271] [2020-10-26 22:45:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:45:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:45:40,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:40,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:40,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:42,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:45:42,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-26 22:45:42,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:45:42,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2042 [2020-10-26 22:45:42,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:45:42,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:45:42,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:45:42,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 22:45:42,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:45:42,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:45:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:45:42,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:42,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:45:42,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:45:42,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:45:42,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 22:45:42,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:45:42,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:45:42,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:45:42,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:45:42,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:45:42,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:45:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:45:43,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:43,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:45:43,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:45:43,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:45:43,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-26 22:45:43,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:45:43,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:45:43,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:45:43,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:45:43,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:45:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:45:43,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006292271] [2020-10-26 22:45:43,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:45:43,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:45:43,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963603993] [2020-10-26 22:45:43,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:45:43,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:45:43,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:45:43,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:45:43,321 INFO L87 Difference]: Start difference. First operand 1216 states and 1619 transitions. Second operand 7 states. [2020-10-26 22:45:46,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:45:46,676 INFO L93 Difference]: Finished difference Result 3060 states and 4060 transitions. [2020-10-26 22:45:46,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 22:45:46,678 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 127 [2020-10-26 22:45:46,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:45:46,691 INFO L225 Difference]: With dead ends: 3060 [2020-10-26 22:45:46,691 INFO L226 Difference]: Without dead ends: 1850 [2020-10-26 22:45:46,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 22:45:46,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2020-10-26 22:45:46,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1817. [2020-10-26 22:45:46,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1817 states. [2020-10-26 22:45:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 2291 transitions. [2020-10-26 22:45:46,776 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 2291 transitions. Word has length 127 [2020-10-26 22:45:46,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:45:46,776 INFO L481 AbstractCegarLoop]: Abstraction has 1817 states and 2291 transitions. [2020-10-26 22:45:46,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:45:46,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 2291 transitions. [2020-10-26 22:45:46,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-26 22:45:46,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:45:46,780 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:45:46,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:45:46,781 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:45:46,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:45:46,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1027253090, now seen corresponding path program 1 times [2020-10-26 22:45:46,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:45:46,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484819036] [2020-10-26 22:45:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:45:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:45:46,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:47,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:45:47,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-26 22:45:47,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:45:47,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 495 [2020-10-26 22:45:47,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:45:47,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:45:47,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:45:47,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 22:45:47,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:45:47,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:45:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:45:47,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:47,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:45:47,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:45:47,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:45:47,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:45:47,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:45:47,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:45:47,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:45:47,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:45:47,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:45:47,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:45:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:45:47,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:47,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:45:47,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:45:47,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:45:47,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-26 22:45:47,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:45:47,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:45:47,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:45:47,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:45:47,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:45:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:45:47,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484819036] [2020-10-26 22:45:47,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:45:47,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:45:47,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832175737] [2020-10-26 22:45:47,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:45:47,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:45:47,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:45:47,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:45:47,821 INFO L87 Difference]: Start difference. First operand 1817 states and 2291 transitions. Second operand 5 states. [2020-10-26 22:45:50,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:45:50,639 INFO L93 Difference]: Finished difference Result 3275 states and 4364 transitions. [2020-10-26 22:45:50,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:45:50,641 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 184 [2020-10-26 22:45:50,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:45:50,655 INFO L225 Difference]: With dead ends: 3275 [2020-10-26 22:45:50,655 INFO L226 Difference]: Without dead ends: 2238 [2020-10-26 22:45:50,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:45:50,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2020-10-26 22:45:50,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 2224. [2020-10-26 22:45:50,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2224 states. [2020-10-26 22:45:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 2879 transitions. [2020-10-26 22:45:50,729 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 2879 transitions. Word has length 184 [2020-10-26 22:45:50,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:45:50,730 INFO L481 AbstractCegarLoop]: Abstraction has 2224 states and 2879 transitions. [2020-10-26 22:45:50,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:45:50,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 2879 transitions. [2020-10-26 22:45:50,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-26 22:45:50,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:45:50,736 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1] [2020-10-26 22:45:50,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:45:50,736 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:45:50,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:45:50,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1684312074, now seen corresponding path program 1 times [2020-10-26 22:45:50,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:45:50,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547517002] [2020-10-26 22:45:50,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:45:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:45:50,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:51,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:51,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:53,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:45:53,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-26 22:45:53,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:45:53,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2382 [2020-10-26 22:45:53,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:45:53,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:45:53,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-26 22:45:53,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 22:45:53,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:45:53,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:45:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:45:53,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:53,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:45:53,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:45:53,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:45:53,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 22:45:53,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:45:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:45:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:45:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:45:53,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:45:53,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:45:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:45:53,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:53,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:45:53,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:45:53,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:45:53,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-26 22:45:53,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:45:53,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:45:53,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:45:53,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:45:53,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:45:53,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:45:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:45:53,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:53,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:45:53,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:45:53,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:45:53,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-26 22:45:53,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:45:53,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:45:53,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:45:53,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:45:53,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:45:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 161 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:45:54,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547517002] [2020-10-26 22:45:54,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:45:54,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:45:54,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268080233] [2020-10-26 22:45:54,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:45:54,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:45:54,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:45:54,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:45:54,069 INFO L87 Difference]: Start difference. First operand 2224 states and 2879 transitions. Second operand 7 states. [2020-10-26 22:45:57,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:45:57,612 INFO L93 Difference]: Finished difference Result 5471 states and 7307 transitions. [2020-10-26 22:45:57,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:45:57,615 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 243 [2020-10-26 22:45:57,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:45:57,636 INFO L225 Difference]: With dead ends: 5471 [2020-10-26 22:45:57,637 INFO L226 Difference]: Without dead ends: 3631 [2020-10-26 22:45:57,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:45:57,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2020-10-26 22:45:57,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 3596. [2020-10-26 22:45:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3596 states. [2020-10-26 22:45:57,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3596 states to 3596 states and 4454 transitions. [2020-10-26 22:45:57,760 INFO L78 Accepts]: Start accepts. Automaton has 3596 states and 4454 transitions. Word has length 243 [2020-10-26 22:45:57,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:45:57,761 INFO L481 AbstractCegarLoop]: Abstraction has 3596 states and 4454 transitions. [2020-10-26 22:45:57,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:45:57,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3596 states and 4454 transitions. [2020-10-26 22:45:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-26 22:45:57,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:45:57,767 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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 22:45:57,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:45:57,768 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:45:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:45:57,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1709731818, now seen corresponding path program 1 times [2020-10-26 22:45:57,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:45:57,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441952834] [2020-10-26 22:45:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:45:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:45:57,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:57,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:58,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:45:59,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:00,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:00,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-26 22:46:00,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:46:00,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2788 [2020-10-26 22:46:00,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:00,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:46:00,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-26 22:46:00,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 22:46:00,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:00,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:46:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:00,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:00,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:00,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:46:00,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:00,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:46:00,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:00,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:46:00,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:00,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:46:00,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:00,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:46:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:00,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:00,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:00,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:46:00,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:00,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-26 22:46:00,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:00,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:46:00,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:00,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:46:00,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:46:01,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:46:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:01,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:01,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:01,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:46:01,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:01,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-26 22:46:01,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:01,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:46:01,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:46:01,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:46:01,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:46:01,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441952834] [2020-10-26 22:46:01,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:46:01,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:46:01,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353101972] [2020-10-26 22:46:01,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:46:01,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:46:01,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:46:01,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:46:01,775 INFO L87 Difference]: Start difference. First operand 3596 states and 4454 transitions. Second operand 8 states. [2020-10-26 22:46:06,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:46:06,438 INFO L93 Difference]: Finished difference Result 8032 states and 10272 transitions. [2020-10-26 22:46:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 22:46:06,439 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 249 [2020-10-26 22:46:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:46:06,462 INFO L225 Difference]: With dead ends: 8032 [2020-10-26 22:46:06,463 INFO L226 Difference]: Without dead ends: 4820 [2020-10-26 22:46:06,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 22:46:06,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4820 states. [2020-10-26 22:46:06,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4820 to 4377. [2020-10-26 22:46:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4377 states. [2020-10-26 22:46:06,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 5509 transitions. [2020-10-26 22:46:06,600 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 5509 transitions. Word has length 249 [2020-10-26 22:46:06,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:46:06,601 INFO L481 AbstractCegarLoop]: Abstraction has 4377 states and 5509 transitions. [2020-10-26 22:46:06,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:46:06,601 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 5509 transitions. [2020-10-26 22:46:06,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-26 22:46:06,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:46:06,607 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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 22:46:06,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:46:06,607 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:46:06,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:46:06,608 INFO L82 PathProgramCache]: Analyzing trace with hash 2117509150, now seen corresponding path program 1 times [2020-10-26 22:46:06,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:46:06,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028941703] [2020-10-26 22:46:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:46:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:06,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:06,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:07,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:07,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-26 22:46:07,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:46:07,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1054 [2020-10-26 22:46:07,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:07,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:46:07,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-10-26 22:46:07,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 22:46:07,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:46:07,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:46:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:07,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:07,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:07,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:46:07,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:07,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:46:07,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:07,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:46:07,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:07,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:46:07,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:07,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:46:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:07,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:07,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:07,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:46:07,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:07,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 22:46:07,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:07,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:46:07,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:07,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:46:07,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:08,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:46:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:08,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:08,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:08,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 22:46:08,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:08,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-26 22:46:08,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:08,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:46:08,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:08,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 22:46:08,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:46:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-26 22:46:08,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028941703] [2020-10-26 22:46:08,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:46:08,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:46:08,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335995187] [2020-10-26 22:46:08,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:46:08,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:46:08,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:46:08,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:46:08,398 INFO L87 Difference]: Start difference. First operand 4377 states and 5509 transitions. Second operand 5 states. [2020-10-26 22:46:09,486 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 22:46:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:46:10,728 INFO L93 Difference]: Finished difference Result 7435 states and 9497 transitions. [2020-10-26 22:46:10,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:46:10,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 253 [2020-10-26 22:46:10,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:46:10,753 INFO L225 Difference]: With dead ends: 7435 [2020-10-26 22:46:10,753 INFO L226 Difference]: Without dead ends: 4403 [2020-10-26 22:46:10,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:46:10,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4403 states. [2020-10-26 22:46:10,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4403 to 4377. [2020-10-26 22:46:10,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4377 states. [2020-10-26 22:46:10,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 5497 transitions. [2020-10-26 22:46:10,907 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 5497 transitions. Word has length 253 [2020-10-26 22:46:10,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:46:10,908 INFO L481 AbstractCegarLoop]: Abstraction has 4377 states and 5497 transitions. [2020-10-26 22:46:10,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:46:10,908 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 5497 transitions. [2020-10-26 22:46:10,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-26 22:46:10,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:46:10,915 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:46:10,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:46:10,916 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:46:10,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:46:10,916 INFO L82 PathProgramCache]: Analyzing trace with hash 2111281374, now seen corresponding path program 1 times [2020-10-26 22:46:10,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:46:10,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230678484] [2020-10-26 22:46:10,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:46:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:11,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:11,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:11,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:13,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:13,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-26 22:46:13,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:46:13,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2128 [2020-10-26 22:46:13,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:13,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:46:13,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 136 [2020-10-26 22:46:13,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 22:46:13,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:13,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:46:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:13,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:13,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:13,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:46:13,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:13,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:46:13,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:46:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:46:13,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:13,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:46:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:13,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:13,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:13,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:46:13,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:13,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-26 22:46:13,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:13,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:46:13,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:13,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-26 22:46:13,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:13,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:46:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:13,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:13,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:13,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:46:13,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:13,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-26 22:46:13,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:13,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:46:13,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:46:13,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:46:13,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 161 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:46:13,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230678484] [2020-10-26 22:46:13,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:46:13,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:46:13,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154067942] [2020-10-26 22:46:13,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:46:13,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:46:13,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:46:13,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:46:13,787 INFO L87 Difference]: Start difference. First operand 4377 states and 5497 transitions. Second operand 7 states. [2020-10-26 22:46:14,694 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-26 22:46:18,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:46:18,654 INFO L93 Difference]: Finished difference Result 10592 states and 13865 transitions. [2020-10-26 22:46:18,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:46:18,656 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 253 [2020-10-26 22:46:18,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:46:18,685 INFO L225 Difference]: With dead ends: 10592 [2020-10-26 22:46:18,685 INFO L226 Difference]: Without dead ends: 6599 [2020-10-26 22:46:18,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:46:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6599 states. [2020-10-26 22:46:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6599 to 6161. [2020-10-26 22:46:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6161 states. [2020-10-26 22:46:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6161 states to 6161 states and 7564 transitions. [2020-10-26 22:46:18,883 INFO L78 Accepts]: Start accepts. Automaton has 6161 states and 7564 transitions. Word has length 253 [2020-10-26 22:46:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:46:18,883 INFO L481 AbstractCegarLoop]: Abstraction has 6161 states and 7564 transitions. [2020-10-26 22:46:18,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:46:18,884 INFO L276 IsEmpty]: Start isEmpty. Operand 6161 states and 7564 transitions. [2020-10-26 22:46:18,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-26 22:46:18,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:46:18,890 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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 22:46:18,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:46:18,890 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:46:18,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:46:18,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1108192419, now seen corresponding path program 1 times [2020-10-26 22:46:18,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:46:18,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150874639] [2020-10-26 22:46:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:46:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:19,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:19,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:20,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:20,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-26 22:46:20,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:46:20,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1601 [2020-10-26 22:46:20,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:20,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:46:20,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:46:20,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:46:20,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:20,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:46:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:20,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:20,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:20,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:46:20,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:20,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 22:46:20,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:20,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:46:20,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:20,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:46:20,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:20,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:46:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:20,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:20,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:20,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:46:20,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:20,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-26 22:46:20,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:20,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:46:20,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:20,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:46:20,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:46:20,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:46:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:20,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:21,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:21,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 22:46:21,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:21,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-26 22:46:21,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:21,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:46:21,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:46:21,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 22:46:21,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:46:21,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150874639] [2020-10-26 22:46:21,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:46:21,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:46:21,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314782509] [2020-10-26 22:46:21,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:46:21,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:46:21,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:46:21,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:46:21,224 INFO L87 Difference]: Start difference. First operand 6161 states and 7564 transitions. Second operand 7 states. [2020-10-26 22:46:25,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:46:25,232 INFO L93 Difference]: Finished difference Result 13956 states and 17276 transitions. [2020-10-26 22:46:25,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:46:25,233 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 254 [2020-10-26 22:46:25,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:46:25,267 INFO L225 Difference]: With dead ends: 13956 [2020-10-26 22:46:25,268 INFO L226 Difference]: Without dead ends: 8179 [2020-10-26 22:46:25,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:46:25,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8179 states. [2020-10-26 22:46:25,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8179 to 8122. [2020-10-26 22:46:25,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8122 states. [2020-10-26 22:46:25,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8122 states to 8122 states and 9893 transitions. [2020-10-26 22:46:25,482 INFO L78 Accepts]: Start accepts. Automaton has 8122 states and 9893 transitions. Word has length 254 [2020-10-26 22:46:25,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:46:25,482 INFO L481 AbstractCegarLoop]: Abstraction has 8122 states and 9893 transitions. [2020-10-26 22:46:25,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:46:25,483 INFO L276 IsEmpty]: Start isEmpty. Operand 8122 states and 9893 transitions. [2020-10-26 22:46:25,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-26 22:46:25,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:46:25,490 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:46:25,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 22:46:25,490 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:46:25,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:46:25,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1713246261, now seen corresponding path program 1 times [2020-10-26 22:46:25,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:46:25,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226808950] [2020-10-26 22:46:25,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:46:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:25,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:25,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:25,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:26,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:29,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:30,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:30,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-26 22:46:30,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:46:30,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 22:46:30,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:30,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:46:30,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:46:30,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-26 22:46:30,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:46:30,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:46:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:30,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:30,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:30,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:46:30,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:30,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 22:46:30,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:30,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:46:30,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:30,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:46:30,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:30,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:46:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:30,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:30,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:31,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:31,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:46:31,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:46:31,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-26 22:46:31,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:31,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:46:31,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:46:31,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-26 22:46:31,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:31,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:46:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:31,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:31,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:31,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:46:31,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:31,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 22:46:31,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:31,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:46:31,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-26 22:46:31,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:46:31,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 90 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:46:31,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226808950] [2020-10-26 22:46:31,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:46:31,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:46:31,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044320702] [2020-10-26 22:46:31,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:46:31,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:46:31,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:46:31,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:46:31,359 INFO L87 Difference]: Start difference. First operand 8122 states and 9893 transitions. Second operand 7 states. [2020-10-26 22:46:34,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:46:34,414 INFO L93 Difference]: Finished difference Result 15154 states and 18978 transitions. [2020-10-26 22:46:34,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:46:34,419 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 264 [2020-10-26 22:46:34,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:46:34,451 INFO L225 Difference]: With dead ends: 15154 [2020-10-26 22:46:34,451 INFO L226 Difference]: Without dead ends: 7416 [2020-10-26 22:46:34,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:46:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7416 states. [2020-10-26 22:46:34,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7416 to 7304. [2020-10-26 22:46:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-10-26 22:46:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 8541 transitions. [2020-10-26 22:46:34,644 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 8541 transitions. Word has length 264 [2020-10-26 22:46:34,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:46:34,644 INFO L481 AbstractCegarLoop]: Abstraction has 7304 states and 8541 transitions. [2020-10-26 22:46:34,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:46:34,644 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 8541 transitions. [2020-10-26 22:46:34,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-26 22:46:34,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:46:34,653 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:46:34,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 22:46:34,653 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:46:34,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:46:34,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1889562130, now seen corresponding path program 1 times [2020-10-26 22:46:34,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:46:34,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096080987] [2020-10-26 22:46:34,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:46:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:34,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:34,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:35,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:35,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 294 [2020-10-26 22:46:35,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:46:35,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 839 [2020-10-26 22:46:35,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:35,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:46:35,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 239 [2020-10-26 22:46:35,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 22:46:35,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:35,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:46:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:35,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:35,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:35,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:46:35,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:35,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:46:35,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:35,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:46:35,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:35,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:46:35,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:35,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:46:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:35,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:35,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:35,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:46:35,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:35,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 22:46:35,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:35,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:46:35,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:35,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:46:35,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:35,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:46:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:35,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:36,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:36,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 22:46:36,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:36,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 22:46:36,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:36,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:46:36,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:36,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 22:46:36,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-26 22:46:36,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096080987] [2020-10-26 22:46:36,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:46:36,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:46:36,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217809491] [2020-10-26 22:46:36,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:46:36,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:46:36,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:46:36,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:46:36,218 INFO L87 Difference]: Start difference. First operand 7304 states and 8541 transitions. Second operand 5 states. [2020-10-26 22:46:37,339 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-26 22:46:38,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:46:38,505 INFO L93 Difference]: Finished difference Result 12730 states and 14941 transitions. [2020-10-26 22:46:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:46:38,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 280 [2020-10-26 22:46:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:46:38,530 INFO L225 Difference]: With dead ends: 12730 [2020-10-26 22:46:38,530 INFO L226 Difference]: Without dead ends: 7336 [2020-10-26 22:46:38,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:46:38,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7336 states. [2020-10-26 22:46:38,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7336 to 7304. [2020-10-26 22:46:38,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-10-26 22:46:38,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 8520 transitions. [2020-10-26 22:46:38,690 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 8520 transitions. Word has length 280 [2020-10-26 22:46:38,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:46:38,690 INFO L481 AbstractCegarLoop]: Abstraction has 7304 states and 8520 transitions. [2020-10-26 22:46:38,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:46:38,691 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 8520 transitions. [2020-10-26 22:46:38,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-26 22:46:38,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:46:38,697 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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 22:46:38,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 22:46:38,698 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:46:38,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:46:38,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1509356020, now seen corresponding path program 1 times [2020-10-26 22:46:38,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:46:38,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195253019] [2020-10-26 22:46:38,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:46:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:38,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:38,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:39,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:41,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:41,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 294 [2020-10-26 22:46:41,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:46:41,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2346 [2020-10-26 22:46:41,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:41,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:46:41,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:46:41,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 22:46:41,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:41,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:46:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:41,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:41,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:41,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:46:41,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:41,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:46:41,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:41,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:46:41,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:41,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:46:41,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:41,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:46:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:41,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:41,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:41,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:46:41,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:41,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-26 22:46:41,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:41,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:46:41,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:41,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:46:41,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:41,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:46:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:41,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:41,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:41,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:46:41,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:41,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 22:46:41,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:41,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:46:41,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:46:41,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:46:41,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:46:41,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195253019] [2020-10-26 22:46:41,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:46:41,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:46:41,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119676566] [2020-10-26 22:46:41,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:46:41,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:46:41,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:46:41,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:46:41,746 INFO L87 Difference]: Start difference. First operand 7304 states and 8520 transitions. Second operand 7 states. [2020-10-26 22:46:45,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:46:45,683 INFO L93 Difference]: Finished difference Result 16326 states and 20005 transitions. [2020-10-26 22:46:45,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:46:45,685 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 280 [2020-10-26 22:46:45,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:46:45,719 INFO L225 Difference]: With dead ends: 16326 [2020-10-26 22:46:45,719 INFO L226 Difference]: Without dead ends: 9406 [2020-10-26 22:46:45,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:46:45,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9406 states. [2020-10-26 22:46:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9406 to 9251. [2020-10-26 22:46:45,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9251 states. [2020-10-26 22:46:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9251 states to 9251 states and 10848 transitions. [2020-10-26 22:46:45,950 INFO L78 Accepts]: Start accepts. Automaton has 9251 states and 10848 transitions. Word has length 280 [2020-10-26 22:46:45,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:46:45,950 INFO L481 AbstractCegarLoop]: Abstraction has 9251 states and 10848 transitions. [2020-10-26 22:46:45,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:46:45,951 INFO L276 IsEmpty]: Start isEmpty. Operand 9251 states and 10848 transitions. [2020-10-26 22:46:45,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-26 22:46:45,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:46:45,959 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2020-10-26 22:46:45,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 22:46:45,960 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:46:45,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:46:45,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1917337192, now seen corresponding path program 1 times [2020-10-26 22:46:45,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:46:45,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674652120] [2020-10-26 22:46:45,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:46:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:46,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:46,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:47,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:47,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-26 22:46:47,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:46:47,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1398 [2020-10-26 22:46:47,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:47,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:46:47,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 258 [2020-10-26 22:46:47,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 22:46:47,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:47,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:46:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:47,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:47,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:47,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:46:47,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:47,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:46:47,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:47,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:46:47,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:47,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:46:47,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:47,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:46:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:47,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:47,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:47,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:46:47,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:47,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 22:46:47,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:47,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:46:47,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:47,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:46:47,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:47,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:46:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:47,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:47,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:47,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-26 22:46:47,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:47,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-26 22:46:47,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:47,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:46:47,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:47,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:46:47,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-10-26 22:46:48,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674652120] [2020-10-26 22:46:48,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:46:48,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:46:48,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400098594] [2020-10-26 22:46:48,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:46:48,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:46:48,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:46:48,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:46:48,189 INFO L87 Difference]: Start difference. First operand 9251 states and 10848 transitions. Second operand 5 states. [2020-10-26 22:46:49,374 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-26 22:46:50,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:46:50,558 INFO L93 Difference]: Finished difference Result 16042 states and 18881 transitions. [2020-10-26 22:46:50,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:46:50,564 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 299 [2020-10-26 22:46:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:46:50,588 INFO L225 Difference]: With dead ends: 16042 [2020-10-26 22:46:50,588 INFO L226 Difference]: Without dead ends: 9281 [2020-10-26 22:46:50,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:46:50,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9281 states. [2020-10-26 22:46:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9281 to 9249. [2020-10-26 22:46:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9249 states. [2020-10-26 22:46:50,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9249 states to 9249 states and 10821 transitions. [2020-10-26 22:46:50,777 INFO L78 Accepts]: Start accepts. Automaton has 9249 states and 10821 transitions. Word has length 299 [2020-10-26 22:46:50,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:46:50,778 INFO L481 AbstractCegarLoop]: Abstraction has 9249 states and 10821 transitions. [2020-10-26 22:46:50,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:46:50,778 INFO L276 IsEmpty]: Start isEmpty. Operand 9249 states and 10821 transitions. [2020-10-26 22:46:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-26 22:46:50,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:46:50,789 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2020-10-26 22:46:50,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 22:46:50,789 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:46:50,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:46:50,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1451047084, now seen corresponding path program 1 times [2020-10-26 22:46:50,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:46:50,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309530948] [2020-10-26 22:46:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:46:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:50,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:51,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:51,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:53,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:53,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-10-26 22:46:53,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:46:53,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2541 [2020-10-26 22:46:53,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:53,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 22:46:53,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:46:53,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 328 [2020-10-26 22:46:53,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:53,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:46:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:53,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:53,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:53,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:46:53,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:53,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 22:46:53,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:53,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:46:53,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:46:53,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:46:53,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:53,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:46:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:53,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:53,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:53,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:46:53,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:53,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-26 22:46:53,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:53,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:46:53,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:46:53,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-26 22:46:53,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:53,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:46:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:54,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:54,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:46:54,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-26 22:46:54,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:46:54,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-26 22:46:54,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:46:54,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:46:54,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:46:54,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-26 22:46:54,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:46:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 122 proven. 92 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:46:54,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309530948] [2020-10-26 22:46:54,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:46:54,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:46:54,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3201408] [2020-10-26 22:46:54,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 22:46:54,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:46:54,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 22:46:54,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 22:46:54,398 INFO L87 Difference]: Start difference. First operand 9249 states and 10821 transitions. Second operand 9 states. [2020-10-26 22:46:57,098 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-10-26 22:46:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:46:58,738 INFO L93 Difference]: Finished difference Result 17830 states and 21160 transitions. [2020-10-26 22:46:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 22:46:58,739 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 323 [2020-10-26 22:46:58,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:46:58,771 INFO L225 Difference]: With dead ends: 17830 [2020-10-26 22:46:58,771 INFO L226 Difference]: Without dead ends: 11085 [2020-10-26 22:46:58,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-26 22:46:58,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11085 states. [2020-10-26 22:46:58,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11085 to 11043. [2020-10-26 22:46:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11043 states. [2020-10-26 22:46:58,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11043 states to 11043 states and 13006 transitions. [2020-10-26 22:46:58,993 INFO L78 Accepts]: Start accepts. Automaton has 11043 states and 13006 transitions. Word has length 323 [2020-10-26 22:46:58,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:46:58,994 INFO L481 AbstractCegarLoop]: Abstraction has 11043 states and 13006 transitions. [2020-10-26 22:46:58,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 22:46:58,994 INFO L276 IsEmpty]: Start isEmpty. Operand 11043 states and 13006 transitions. [2020-10-26 22:46:59,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-10-26 22:46:59,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:46:59,007 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:46:59,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 22:46:59,007 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:46:59,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:46:59,008 INFO L82 PathProgramCache]: Analyzing trace with hash -865099084, now seen corresponding path program 1 times [2020-10-26 22:46:59,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:46:59,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629684253] [2020-10-26 22:46:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:46:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:46:59,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:46:59,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:00,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:00,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 380 [2020-10-26 22:47:00,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:47:00,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1392 [2020-10-26 22:47:00,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:00,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 22:47:00,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:47:00,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-10-26 22:47:00,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:00,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:47:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:00,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:00,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:00,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:47:00,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:00,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 22:47:00,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:00,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:47:00,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:00,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:47:00,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:00,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:47:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:00,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:00,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:00,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:47:00,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:00,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-26 22:47:00,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:00,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:47:00,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:00,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:47:00,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:00,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:47:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:00,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:01,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:01,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:47:01,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:01,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-26 22:47:01,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:01,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:47:01,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:47:01,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-26 22:47:01,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 220 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:47:01,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629684253] [2020-10-26 22:47:01,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:47:01,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:47:01,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48222280] [2020-10-26 22:47:01,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:47:01,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:47:01,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:47:01,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:47:01,453 INFO L87 Difference]: Start difference. First operand 11043 states and 13006 transitions. Second operand 8 states. [2020-10-26 22:47:03,634 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 22:47:05,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:47:05,356 INFO L93 Difference]: Finished difference Result 23083 states and 27270 transitions. [2020-10-26 22:47:05,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:47:05,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 366 [2020-10-26 22:47:05,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:47:05,388 INFO L225 Difference]: With dead ends: 23083 [2020-10-26 22:47:05,389 INFO L226 Difference]: Without dead ends: 12405 [2020-10-26 22:47:05,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:47:05,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12405 states. [2020-10-26 22:47:05,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12405 to 12162. [2020-10-26 22:47:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12162 states. [2020-10-26 22:47:05,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12162 states to 12162 states and 14283 transitions. [2020-10-26 22:47:05,637 INFO L78 Accepts]: Start accepts. Automaton has 12162 states and 14283 transitions. Word has length 366 [2020-10-26 22:47:05,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:47:05,637 INFO L481 AbstractCegarLoop]: Abstraction has 12162 states and 14283 transitions. [2020-10-26 22:47:05,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:47:05,637 INFO L276 IsEmpty]: Start isEmpty. Operand 12162 states and 14283 transitions. [2020-10-26 22:47:05,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-10-26 22:47:05,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:47:05,652 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-10-26 22:47:05,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 22:47:05,654 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:47:05,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:47:05,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1359216129, now seen corresponding path program 1 times [2020-10-26 22:47:05,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:47:05,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901482414] [2020-10-26 22:47:05,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:47:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:05,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:05,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:07,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:07,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 386 [2020-10-26 22:47:07,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:47:07,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1644 [2020-10-26 22:47:07,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:07,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:47:07,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-26 22:47:07,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 22:47:07,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:07,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:47:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:07,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:07,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:07,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:47:07,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:07,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:47:07,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:07,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:47:07,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:07,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:47:07,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:07,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:47:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:07,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:07,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:07,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:47:07,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:07,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 22:47:07,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:07,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:47:07,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:07,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:47:07,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:07,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:47:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:07,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:07,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:07,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:47:07,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:07,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-26 22:47:07,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:07,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:47:07,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:07,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-26 22:47:07,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:07,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 22:47:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:07,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:07,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:07,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 22:47:07,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:07,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-26 22:47:07,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:07,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:47:07,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:47:07,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 22:47:07,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 274 proven. 2 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-26 22:47:08,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901482414] [2020-10-26 22:47:08,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:47:08,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:47:08,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863519142] [2020-10-26 22:47:08,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:47:08,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:47:08,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:47:08,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:47:08,277 INFO L87 Difference]: Start difference. First operand 12162 states and 14283 transitions. Second operand 7 states. [2020-10-26 22:47:11,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:47:11,981 INFO L93 Difference]: Finished difference Result 22621 states and 26856 transitions. [2020-10-26 22:47:11,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:47:11,982 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 370 [2020-10-26 22:47:11,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:47:12,014 INFO L225 Difference]: With dead ends: 22621 [2020-10-26 22:47:12,014 INFO L226 Difference]: Without dead ends: 12975 [2020-10-26 22:47:12,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:47:12,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12975 states. [2020-10-26 22:47:12,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12975 to 12922. [2020-10-26 22:47:12,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12922 states. [2020-10-26 22:47:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12922 states to 12922 states and 15049 transitions. [2020-10-26 22:47:12,286 INFO L78 Accepts]: Start accepts. Automaton has 12922 states and 15049 transitions. Word has length 370 [2020-10-26 22:47:12,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:47:12,287 INFO L481 AbstractCegarLoop]: Abstraction has 12922 states and 15049 transitions. [2020-10-26 22:47:12,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:47:12,287 INFO L276 IsEmpty]: Start isEmpty. Operand 12922 states and 15049 transitions. [2020-10-26 22:47:12,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-10-26 22:47:12,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:47:12,299 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:47:12,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 22:47:12,300 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:47:12,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:47:12,300 INFO L82 PathProgramCache]: Analyzing trace with hash 179486653, now seen corresponding path program 1 times [2020-10-26 22:47:12,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:47:12,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765201522] [2020-10-26 22:47:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:47:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:12,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:12,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:13,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:14,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:14,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:17,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:17,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 390 [2020-10-26 22:47:17,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:47:17,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 22:47:17,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:17,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 22:47:17,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:47:17,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 317 [2020-10-26 22:47:17,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:17,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:47:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:17,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:17,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:17,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:47:17,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:17,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 22:47:17,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:17,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:47:17,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:17,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:47:17,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:17,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:47:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:17,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:17,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:17,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:47:17,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:17,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-26 22:47:17,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:17,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:47:17,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:47:17,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-26 22:47:17,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:17,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:47:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:17,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:18,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:18,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 22:47:18,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:18,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-26 22:47:18,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:18,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:47:18,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:47:18,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 22:47:18,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:18,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2020-10-26 22:47:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:18,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:18,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:18,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:18,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:47:18,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:47:18,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-26 22:47:18,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:18,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 22:47:18,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:47:18,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:47:18,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:18,933 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-26 22:47:19,134 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-26 22:47:19,349 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-26 22:47:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 137 proven. 159 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-26 22:47:20,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765201522] [2020-10-26 22:47:20,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:47:20,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 22:47:20,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521026345] [2020-10-26 22:47:20,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 22:47:20,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:47:20,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 22:47:20,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-26 22:47:20,035 INFO L87 Difference]: Start difference. First operand 12922 states and 15049 transitions. Second operand 13 states. [2020-10-26 22:47:20,250 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 69 [2020-10-26 22:47:21,380 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 88 [2020-10-26 22:47:21,744 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 91 [2020-10-26 22:47:22,107 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 91 [2020-10-26 22:47:22,574 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 26 [2020-10-26 22:47:23,006 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 85 [2020-10-26 22:47:23,452 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-26 22:47:23,707 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-26 22:47:23,991 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-26 22:47:24,187 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-26 22:47:24,476 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 80 [2020-10-26 22:47:24,860 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 83 [2020-10-26 22:47:25,248 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 83 [2020-10-26 22:47:26,300 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-26 22:47:26,850 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-26 22:47:27,135 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-26 22:47:27,606 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-26 22:47:28,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:47:28,689 INFO L93 Difference]: Finished difference Result 23483 states and 27448 transitions. [2020-10-26 22:47:28,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 22:47:28,690 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 374 [2020-10-26 22:47:28,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:47:28,712 INFO L225 Difference]: With dead ends: 23483 [2020-10-26 22:47:28,713 INFO L226 Difference]: Without dead ends: 13011 [2020-10-26 22:47:28,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=248, Invalid=874, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 22:47:28,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13011 states. [2020-10-26 22:47:28,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13011 to 12942. [2020-10-26 22:47:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12942 states. [2020-10-26 22:47:28,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12942 states to 12942 states and 15066 transitions. [2020-10-26 22:47:28,958 INFO L78 Accepts]: Start accepts. Automaton has 12942 states and 15066 transitions. Word has length 374 [2020-10-26 22:47:28,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:47:28,958 INFO L481 AbstractCegarLoop]: Abstraction has 12942 states and 15066 transitions. [2020-10-26 22:47:28,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 22:47:28,959 INFO L276 IsEmpty]: Start isEmpty. Operand 12942 states and 15066 transitions. [2020-10-26 22:47:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-10-26 22:47:28,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:47:28,971 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:47:28,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 22:47:28,971 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:47:28,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:47:28,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1381145710, now seen corresponding path program 1 times [2020-10-26 22:47:28,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:47:28,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779505696] [2020-10-26 22:47:28,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:47:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:29,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:29,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:30,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:30,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 391 [2020-10-26 22:47:30,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:47:30,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1607 [2020-10-26 22:47:30,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:30,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:47:30,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 224 [2020-10-26 22:47:30,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-26 22:47:30,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:30,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:47:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:30,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:30,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:30,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:47:30,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:30,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 22:47:30,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:30,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:47:30,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:30,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:47:30,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:30,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:47:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:30,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:30,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:30,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:47:30,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:30,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 22:47:30,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:30,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:47:30,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:30,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:47:30,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:30,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:47:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:30,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:30,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:30,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 22:47:30,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:30,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 22:47:30,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:30,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:47:30,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:30,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:47:30,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:30,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-10-26 22:47:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:31,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:31,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:31,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 22:47:31,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:31,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-26 22:47:31,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:31,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:47:31,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:47:31,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:47:31,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 330 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-26 22:47:31,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779505696] [2020-10-26 22:47:31,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:47:31,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:47:31,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673717788] [2020-10-26 22:47:31,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:47:31,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:47:31,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:47:31,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:47:31,416 INFO L87 Difference]: Start difference. First operand 12942 states and 15066 transitions. Second operand 7 states. [2020-10-26 22:47:34,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:47:34,805 INFO L93 Difference]: Finished difference Result 24006 states and 28038 transitions. [2020-10-26 22:47:34,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:47:34,806 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 375 [2020-10-26 22:47:34,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:47:34,830 INFO L225 Difference]: With dead ends: 24006 [2020-10-26 22:47:34,831 INFO L226 Difference]: Without dead ends: 13584 [2020-10-26 22:47:34,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:47:34,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13584 states. [2020-10-26 22:47:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13584 to 13326. [2020-10-26 22:47:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13326 states. [2020-10-26 22:47:35,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13326 states to 13326 states and 15535 transitions. [2020-10-26 22:47:35,072 INFO L78 Accepts]: Start accepts. Automaton has 13326 states and 15535 transitions. Word has length 375 [2020-10-26 22:47:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:47:35,073 INFO L481 AbstractCegarLoop]: Abstraction has 13326 states and 15535 transitions. [2020-10-26 22:47:35,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:47:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 13326 states and 15535 transitions. [2020-10-26 22:47:35,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-10-26 22:47:35,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:47:35,083 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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 22:47:35,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 22:47:35,084 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:47:35,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:47:35,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1334211057, now seen corresponding path program 1 times [2020-10-26 22:47:35,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:47:35,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694623556] [2020-10-26 22:47:35,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:47:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:35,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:35,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:35,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:36,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:37,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:38,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:38,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 392 [2020-10-26 22:47:38,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:47:38,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3211 [2020-10-26 22:47:38,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:38,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:47:38,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 255 [2020-10-26 22:47:38,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-26 22:47:38,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:38,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:47:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:38,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:38,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:38,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:47:38,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:38,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 22:47:38,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:38,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:47:38,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:38,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:47:38,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:38,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:47:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:38,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:38,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:38,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:47:38,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:38,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 22:47:38,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:38,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:47:38,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:38,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:47:38,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:38,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 22:47:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:38,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:38,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:38,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 22:47:38,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:38,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 22:47:38,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:38,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:47:38,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:38,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-26 22:47:38,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:38,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-10-26 22:47:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:38,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:38,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:38,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:38,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:47:38,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:47:38,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-26 22:47:38,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:38,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:47:38,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:47:38,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:47:38,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 238 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-26 22:47:39,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694623556] [2020-10-26 22:47:39,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:47:39,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:47:39,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379710796] [2020-10-26 22:47:39,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:47:39,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:47:39,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:47:39,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:47:39,036 INFO L87 Difference]: Start difference. First operand 13326 states and 15535 transitions. Second operand 6 states. [2020-10-26 22:47:42,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:47:42,602 INFO L93 Difference]: Finished difference Result 29567 states and 34981 transitions. [2020-10-26 22:47:42,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:47:42,604 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 376 [2020-10-26 22:47:42,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:47:42,641 INFO L225 Difference]: With dead ends: 29567 [2020-10-26 22:47:42,642 INFO L226 Difference]: Without dead ends: 16625 [2020-10-26 22:47:42,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:47:42,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16625 states. [2020-10-26 22:47:42,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16625 to 15816. [2020-10-26 22:47:42,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15816 states. [2020-10-26 22:47:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15816 states to 15816 states and 18726 transitions. [2020-10-26 22:47:42,923 INFO L78 Accepts]: Start accepts. Automaton has 15816 states and 18726 transitions. Word has length 376 [2020-10-26 22:47:42,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:47:42,923 INFO L481 AbstractCegarLoop]: Abstraction has 15816 states and 18726 transitions. [2020-10-26 22:47:42,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:47:42,923 INFO L276 IsEmpty]: Start isEmpty. Operand 15816 states and 18726 transitions. [2020-10-26 22:47:42,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-10-26 22:47:42,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:47:42,932 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:47:42,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 22:47:42,933 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:47:42,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:47:42,933 INFO L82 PathProgramCache]: Analyzing trace with hash -999839473, now seen corresponding path program 1 times [2020-10-26 22:47:42,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:47:42,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296104790] [2020-10-26 22:47:42,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:47:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:43,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:43,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:43,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:43,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:43,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:46,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:48,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:48,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 411 [2020-10-26 22:47:48,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 22:47:48,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 22:47:48,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:48,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 22:47:48,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:47:48,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 240 [2020-10-26 22:47:48,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:48,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:47:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:48,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:48,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:48,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:47:48,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:48,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 22:47:48,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:48,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:47:48,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:48,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:47:48,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:48,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:47:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:48,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:48,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:48,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:47:48,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:48,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-26 22:47:48,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:48,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:47:48,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:47:48,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-26 22:47:48,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:48,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:47:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:48,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:48,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:48,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:47:48,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:48,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-26 22:47:48,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:48,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:47:48,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:47:48,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:47:48,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:48,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-10-26 22:47:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:49,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:49,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:49,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:49,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 22:47:49,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:47:49,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-26 22:47:49,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:49,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:47:49,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:47:49,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 22:47:49,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 318 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-26 22:47:49,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296104790] [2020-10-26 22:47:49,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:47:49,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 22:47:49,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916932411] [2020-10-26 22:47:49,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 22:47:49,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:47:49,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 22:47:49,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:47:49,702 INFO L87 Difference]: Start difference. First operand 15816 states and 18726 transitions. Second operand 10 states. [2020-10-26 22:47:49,886 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-26 22:47:51,533 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-26 22:47:52,237 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2020-10-26 22:47:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:47:54,145 INFO L93 Difference]: Finished difference Result 28434 states and 33770 transitions. [2020-10-26 22:47:54,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 22:47:54,146 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 395 [2020-10-26 22:47:54,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:47:54,171 INFO L225 Difference]: With dead ends: 28434 [2020-10-26 22:47:54,171 INFO L226 Difference]: Without dead ends: 15874 [2020-10-26 22:47:54,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-10-26 22:47:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15874 states. [2020-10-26 22:47:54,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15874 to 15825. [2020-10-26 22:47:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15825 states. [2020-10-26 22:47:54,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15825 states to 15825 states and 18708 transitions. [2020-10-26 22:47:54,411 INFO L78 Accepts]: Start accepts. Automaton has 15825 states and 18708 transitions. Word has length 395 [2020-10-26 22:47:54,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:47:54,411 INFO L481 AbstractCegarLoop]: Abstraction has 15825 states and 18708 transitions. [2020-10-26 22:47:54,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 22:47:54,411 INFO L276 IsEmpty]: Start isEmpty. Operand 15825 states and 18708 transitions. [2020-10-26 22:47:54,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-10-26 22:47:54,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:47:54,426 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2020-10-26 22:47:54,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 22:47:54,426 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:47:54,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:47:54,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1577643733, now seen corresponding path program 1 times [2020-10-26 22:47:54,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:47:54,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210627648] [2020-10-26 22:47:54,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:47:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:54,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:54,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:54,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:54,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:55,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:59,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:59,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 488 [2020-10-26 22:47:59,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:47:59,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-26 22:47:59,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:59,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:47:59,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 234 [2020-10-26 22:47:59,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 22:47:59,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:59,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:47:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:59,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:59,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:59,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:47:59,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:59,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:47:59,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:59,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:47:59,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:59,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:47:59,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:59,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:47:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:59,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:59,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:59,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:47:59,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:59,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 22:47:59,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:59,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:47:59,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:59,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:47:59,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:47:59,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:47:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:47:59,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:47:59,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:47:59,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 22:47:59,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:47:59,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-26 22:47:59,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:47:59,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:47:59,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:47:59,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 22:47:59,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:00,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-10-26 22:48:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:00,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:00,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:00,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:00,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:48:00,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:48:00,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-26 22:48:00,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:00,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:00,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:00,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:48:00,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:00,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2020-10-26 22:48:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:00,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:00,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:00,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 22:48:00,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:00,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 22:48:00,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:00,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:48:00,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 120 [2020-10-26 22:48:00,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:48:00,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 333 proven. 72 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2020-10-26 22:48:00,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210627648] [2020-10-26 22:48:00,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:48:00,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:48:00,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197054385] [2020-10-26 22:48:00,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:48:00,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:00,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:48:00,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:48:00,573 INFO L87 Difference]: Start difference. First operand 15825 states and 18708 transitions. Second operand 7 states. [2020-10-26 22:48:02,143 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-26 22:48:03,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:03,569 INFO L93 Difference]: Finished difference Result 27132 states and 32471 transitions. [2020-10-26 22:48:03,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:48:03,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 470 [2020-10-26 22:48:03,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:03,606 INFO L225 Difference]: With dead ends: 27132 [2020-10-26 22:48:03,606 INFO L226 Difference]: Without dead ends: 15923 [2020-10-26 22:48:03,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:48:03,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15923 states. [2020-10-26 22:48:03,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15923 to 15819. [2020-10-26 22:48:03,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15819 states. [2020-10-26 22:48:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15819 states to 15819 states and 18655 transitions. [2020-10-26 22:48:03,948 INFO L78 Accepts]: Start accepts. Automaton has 15819 states and 18655 transitions. Word has length 470 [2020-10-26 22:48:03,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:03,949 INFO L481 AbstractCegarLoop]: Abstraction has 15819 states and 18655 transitions. [2020-10-26 22:48:03,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:48:03,949 INFO L276 IsEmpty]: Start isEmpty. Operand 15819 states and 18655 transitions. [2020-10-26 22:48:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-10-26 22:48:03,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:03,969 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:48:03,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 22:48:03,969 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:03,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:03,970 INFO L82 PathProgramCache]: Analyzing trace with hash -690958659, now seen corresponding path program 1 times [2020-10-26 22:48:03,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:03,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607399380] [2020-10-26 22:48:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:04,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:04,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:06,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:07,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:07,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 491 [2020-10-26 22:48:07,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:48:07,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3224 [2020-10-26 22:48:07,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:07,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:07,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:48:07,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 22:48:07,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:07,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:07,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:07,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:07,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:07,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:07,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 22:48:07,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:07,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:48:07,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:07,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:48:07,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:07,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:07,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:07,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:07,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:48:07,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:07,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-26 22:48:07,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:07,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:07,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:07,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:48:07,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:07,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:48:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:07,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:07,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:07,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 22:48:07,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:07,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-26 22:48:07,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:07,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:07,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:07,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 22:48:07,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:08,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-10-26 22:48:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:08,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:08,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:08,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:48:08,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:08,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-26 22:48:08,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:08,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:48:08,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-10-26 22:48:08,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:48:08,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 245 proven. 108 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-26 22:48:08,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607399380] [2020-10-26 22:48:08,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:48:08,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:48:08,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630968323] [2020-10-26 22:48:08,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:48:08,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:08,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:48:08,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:48:08,677 INFO L87 Difference]: Start difference. First operand 15819 states and 18655 transitions. Second operand 7 states. [2020-10-26 22:48:12,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:12,558 INFO L93 Difference]: Finished difference Result 28762 states and 34062 transitions. [2020-10-26 22:48:12,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:48:12,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 475 [2020-10-26 22:48:12,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:12,589 INFO L225 Difference]: With dead ends: 28762 [2020-10-26 22:48:12,589 INFO L226 Difference]: Without dead ends: 17785 [2020-10-26 22:48:12,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:48:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17785 states. [2020-10-26 22:48:12,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17785 to 17725. [2020-10-26 22:48:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17725 states. [2020-10-26 22:48:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17725 states to 17725 states and 20767 transitions. [2020-10-26 22:48:12,950 INFO L78 Accepts]: Start accepts. Automaton has 17725 states and 20767 transitions. Word has length 475 [2020-10-26 22:48:12,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:12,951 INFO L481 AbstractCegarLoop]: Abstraction has 17725 states and 20767 transitions. [2020-10-26 22:48:12,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:48:12,951 INFO L276 IsEmpty]: Start isEmpty. Operand 17725 states and 20767 transitions. [2020-10-26 22:48:12,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-10-26 22:48:12,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:12,967 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:48:12,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 22:48:12,967 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:12,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:12,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1925552836, now seen corresponding path program 1 times [2020-10-26 22:48:12,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:12,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780962049] [2020-10-26 22:48:12,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:13,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:13,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:13,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 503 [2020-10-26 22:48:13,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:13,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 813 [2020-10-26 22:48:13,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:13,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:13,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 448 [2020-10-26 22:48:13,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 22:48:13,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:14,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:14,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:14,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:14,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:14,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:14,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:48:14,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:48:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:48:14,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:14,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:14,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:14,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:14,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:48:14,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:14,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 22:48:14,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:14,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:48:14,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:14,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:48:14,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:14,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 22:48:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:14,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:14,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:14,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-26 22:48:14,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:14,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 22:48:14,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:14,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:48:14,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:14,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:48:14,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:14,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-10-26 22:48:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:14,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:14,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:14,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 22:48:14,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:14,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-26 22:48:14,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:14,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:14,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:14,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-26 22:48:14,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 138 proven. 3 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2020-10-26 22:48:14,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780962049] [2020-10-26 22:48:14,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:48:14,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:48:14,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437785095] [2020-10-26 22:48:14,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:48:14,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:14,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:48:14,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:48:14,499 INFO L87 Difference]: Start difference. First operand 17725 states and 20767 transitions. Second operand 5 states. [2020-10-26 22:48:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:17,828 INFO L93 Difference]: Finished difference Result 35723 states and 41948 transitions. [2020-10-26 22:48:17,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:48:17,829 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 487 [2020-10-26 22:48:17,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:17,862 INFO L225 Difference]: With dead ends: 35723 [2020-10-26 22:48:17,863 INFO L226 Difference]: Without dead ends: 18382 [2020-10-26 22:48:17,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:48:17,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18382 states. [2020-10-26 22:48:18,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18382 to 18291. [2020-10-26 22:48:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18291 states. [2020-10-26 22:48:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18291 states to 18291 states and 21346 transitions. [2020-10-26 22:48:18,182 INFO L78 Accepts]: Start accepts. Automaton has 18291 states and 21346 transitions. Word has length 487 [2020-10-26 22:48:18,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:18,183 INFO L481 AbstractCegarLoop]: Abstraction has 18291 states and 21346 transitions. [2020-10-26 22:48:18,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:48:18,183 INFO L276 IsEmpty]: Start isEmpty. Operand 18291 states and 21346 transitions. [2020-10-26 22:48:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2020-10-26 22:48:18,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:18,204 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:48:18,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 22:48:18,204 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:18,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:18,205 INFO L82 PathProgramCache]: Analyzing trace with hash 310535654, now seen corresponding path program 1 times [2020-10-26 22:48:18,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:18,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787991531] [2020-10-26 22:48:18,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:18,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:18,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:20,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:22,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:22,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 551 [2020-10-26 22:48:22,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:48:22,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3798 [2020-10-26 22:48:22,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 217 [2020-10-26 22:48:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 22:48:22,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:22,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:22,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:22,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:22,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:22,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:22,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:48:22,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:22,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:48:22,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:22,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:48:22,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:22,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:22,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:22,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:22,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:48:22,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:22,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 22:48:22,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:22,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:48:22,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:22,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:48:22,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:22,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:48:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:22,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:22,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:22,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:48:22,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:22,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 22:48:22,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:22,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:22,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:22,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 22:48:22,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:22,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-10-26 22:48:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:22,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:22,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:22,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 22:48:22,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:22,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-26 22:48:22,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:22,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:22,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:22,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 22:48:22,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:22,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-10-26 22:48:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:22,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:22,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:22,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:48:22,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:22,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 22:48:22,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:22,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:48:22,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-10-26 22:48:22,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:48:22,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 385 proven. 108 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-26 22:48:23,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787991531] [2020-10-26 22:48:23,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:48:23,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:48:23,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271176470] [2020-10-26 22:48:23,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:48:23,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:23,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:48:23,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:48:23,090 INFO L87 Difference]: Start difference. First operand 18291 states and 21346 transitions. Second operand 7 states. [2020-10-26 22:48:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:26,643 INFO L93 Difference]: Finished difference Result 32196 states and 37733 transitions. [2020-10-26 22:48:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:48:26,644 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 533 [2020-10-26 22:48:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:26,674 INFO L225 Difference]: With dead ends: 32196 [2020-10-26 22:48:26,674 INFO L226 Difference]: Without dead ends: 19317 [2020-10-26 22:48:26,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:48:26,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19317 states. [2020-10-26 22:48:26,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19317 to 19039. [2020-10-26 22:48:26,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19039 states. [2020-10-26 22:48:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19039 states to 19039 states and 22130 transitions. [2020-10-26 22:48:26,998 INFO L78 Accepts]: Start accepts. Automaton has 19039 states and 22130 transitions. Word has length 533 [2020-10-26 22:48:26,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:26,999 INFO L481 AbstractCegarLoop]: Abstraction has 19039 states and 22130 transitions. [2020-10-26 22:48:26,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:48:26,999 INFO L276 IsEmpty]: Start isEmpty. Operand 19039 states and 22130 transitions. [2020-10-26 22:48:27,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2020-10-26 22:48:27,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:27,020 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2020-10-26 22:48:27,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 22:48:27,020 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:27,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:27,021 INFO L82 PathProgramCache]: Analyzing trace with hash -749820355, now seen corresponding path program 1 times [2020-10-26 22:48:27,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:27,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402299009] [2020-10-26 22:48:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:27,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:27,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:27,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:28,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:29,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:30,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:30,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:32,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:32,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 553 [2020-10-26 22:48:32,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 22:48:32,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-26 22:48:32,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:32,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:48:32,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 255 [2020-10-26 22:48:32,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 244 [2020-10-26 22:48:32,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:32,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:32,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:32,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:32,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:32,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:32,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 22:48:32,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:32,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:48:32,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:32,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:48:32,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:32,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:32,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:32,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:32,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:48:32,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:32,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 22:48:32,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:32,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:48:32,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:32,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:48:32,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:32,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 22:48:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:32,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:32,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:32,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 22:48:32,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:32,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 22:48:32,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:32,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:32,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:32,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-26 22:48:32,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:32,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-10-26 22:48:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:32,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:32,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:32,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:32,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:48:32,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:48:32,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-26 22:48:32,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:32,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:32,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:32,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:48:32,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:32,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 331 [2020-10-26 22:48:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:32,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:33,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:33,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 22:48:33,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:33,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-26 22:48:33,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:33,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:33,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:33,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-26 22:48:33,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 558 proven. 6 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-10-26 22:48:33,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402299009] [2020-10-26 22:48:33,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:48:33,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:48:33,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475263632] [2020-10-26 22:48:33,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:48:33,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:33,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:48:33,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:48:33,272 INFO L87 Difference]: Start difference. First operand 19039 states and 22130 transitions. Second operand 7 states. [2020-10-26 22:48:38,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:38,311 INFO L93 Difference]: Finished difference Result 35642 states and 41480 transitions. [2020-10-26 22:48:38,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:48:38,313 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 535 [2020-10-26 22:48:38,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:38,348 INFO L225 Difference]: With dead ends: 35642 [2020-10-26 22:48:38,348 INFO L226 Difference]: Without dead ends: 21627 [2020-10-26 22:48:38,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:48:38,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21627 states. [2020-10-26 22:48:38,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21627 to 19821. [2020-10-26 22:48:38,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19821 states. [2020-10-26 22:48:38,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19821 states to 19821 states and 23025 transitions. [2020-10-26 22:48:38,693 INFO L78 Accepts]: Start accepts. Automaton has 19821 states and 23025 transitions. Word has length 535 [2020-10-26 22:48:38,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:38,694 INFO L481 AbstractCegarLoop]: Abstraction has 19821 states and 23025 transitions. [2020-10-26 22:48:38,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:48:38,694 INFO L276 IsEmpty]: Start isEmpty. Operand 19821 states and 23025 transitions. [2020-10-26 22:48:38,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2020-10-26 22:48:38,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:38,719 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:48:38,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 22:48:38,719 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:38,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:38,721 INFO L82 PathProgramCache]: Analyzing trace with hash 704713618, now seen corresponding path program 1 times [2020-10-26 22:48:38,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:38,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802364374] [2020-10-26 22:48:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:38,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:38,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:39,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:43,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:43,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:43,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 569 [2020-10-26 22:48:43,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:48:43,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-26 22:48:43,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:43,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:43,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 281 [2020-10-26 22:48:43,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 22:48:43,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:44,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:48:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:44,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:44,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:44,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:48:44,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:44,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:48:44,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:44,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:48:44,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:44,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:48:44,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:44,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:48:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:44,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:44,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:44,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:48:44,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:44,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 22:48:44,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:44,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:48:44,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:44,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:48:44,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:44,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:48:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:44,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:44,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:44,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-26 22:48:44,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:44,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-26 22:48:44,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:44,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:48:44,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:48:44,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-26 22:48:44,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:44,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2020-10-26 22:48:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:44,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:44,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:44,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 22:48:44,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:44,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-26 22:48:44,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:44,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:48:44,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:48:44,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 22:48:44,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:44,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 347 [2020-10-26 22:48:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:44,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:44,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:48:44,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 22:48:44,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:48:44,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-26 22:48:44,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:48:44,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:48:44,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:48:44,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:48:44,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:48:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 327 proven. 69 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-10-26 22:48:44,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802364374] [2020-10-26 22:48:44,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:48:44,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:48:44,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071000441] [2020-10-26 22:48:44,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:48:44,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:48:44,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:48:44,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:48:44,842 INFO L87 Difference]: Start difference. First operand 19821 states and 23025 transitions. Second operand 7 states. [2020-10-26 22:48:50,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:48:50,112 INFO L93 Difference]: Finished difference Result 39901 states and 46270 transitions. [2020-10-26 22:48:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:48:50,113 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 551 [2020-10-26 22:48:50,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:48:50,144 INFO L225 Difference]: With dead ends: 39901 [2020-10-26 22:48:50,145 INFO L226 Difference]: Without dead ends: 20274 [2020-10-26 22:48:50,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:48:50,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20274 states. [2020-10-26 22:48:50,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20274 to 19991. [2020-10-26 22:48:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19991 states. [2020-10-26 22:48:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19991 states to 19991 states and 23053 transitions. [2020-10-26 22:48:50,604 INFO L78 Accepts]: Start accepts. Automaton has 19991 states and 23053 transitions. Word has length 551 [2020-10-26 22:48:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:48:50,605 INFO L481 AbstractCegarLoop]: Abstraction has 19991 states and 23053 transitions. [2020-10-26 22:48:50,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:48:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 19991 states and 23053 transitions. [2020-10-26 22:48:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2020-10-26 22:48:50,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:48:50,628 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2020-10-26 22:48:50,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 22:48:50,628 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:48:50,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:48:50,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1853639814, now seen corresponding path program 1 times [2020-10-26 22:48:50,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:48:50,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213989444] [2020-10-26 22:48:50,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:48:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:48:50,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:50,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:48:51,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking...