/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-crafted/mapavg3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:02:20,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:02:20,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:02:20,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:02:20,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:02:20,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:02:20,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:02:20,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:02:20,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:02:20,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:02:20,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:02:20,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:02:20,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:02:20,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:02:20,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:02:20,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:02:20,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:02:20,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:02:20,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:02:20,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:02:20,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:02:20,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:02:20,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:02:20,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:02:20,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:02:20,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:02:20,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:02:20,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:02:20,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:02:20,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:02:20,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:02:20,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:02:20,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:02:20,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:02:20,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:02:20,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:02:20,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:02:20,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:02:20,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:02:20,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:02:20,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:02:20,420 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:02:20,461 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:02:20,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:02:20,463 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:02:20,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:02:20,463 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:02:20,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:02:20,464 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:02:20,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:02:20,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:02:20,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:02:20,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:02:20,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:02:20,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:02:20,468 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:02:20,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:02:20,469 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:02:20,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:02:20,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:02:20,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:02:20,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:02:20,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:02:20,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:02:20,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:02:20,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:02:20,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:02:20,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:02:20,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:02:20,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:02:20,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:02:20,472 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:02:20,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:02:20,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:02:20,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:02:20,919 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:02:20,920 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:02:20,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapavg3.i [2020-10-26 19:02:21,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/985a5a825/4ab3601dfa774d54a80e4ff0e346df21/FLAG5eeaed429 [2020-10-26 19:02:21,694 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:02:21,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/mapavg3.i [2020-10-26 19:02:21,707 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/985a5a825/4ab3601dfa774d54a80e4ff0e346df21/FLAG5eeaed429 [2020-10-26 19:02:22,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/985a5a825/4ab3601dfa774d54a80e4ff0e346df21 [2020-10-26 19:02:22,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:02:22,060 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:02:22,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:02:22,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:02:22,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:02:22,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca3d815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22, skipping insertion in model container [2020-10-26 19:02:22,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:02:22,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:02:22,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:02:22,295 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:02:22,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:02:22,336 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:02:22,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22 WrapperNode [2020-10-26 19:02:22,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:02:22,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:02:22,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:02:22,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:02:22,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (1/1) ... [2020-10-26 19:02:22,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:02:22,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:02:22,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:02:22,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:02:22,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:02:22,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:02:22,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:02:22,453 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:02:22,453 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2020-10-26 19:02:22,454 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:02:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:02:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:02:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:02:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:02:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:02:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:02:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:02:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2020-10-26 19:02:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:02:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:02:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:02:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:02:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:02:22,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:02:22,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:02:22,930 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:02:22,931 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:02:22,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:02:22 BoogieIcfgContainer [2020-10-26 19:02:22,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:02:22,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:02:22,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:02:22,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:02:22,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:02:22" (1/3) ... [2020-10-26 19:02:22,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794931e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:02:22, skipping insertion in model container [2020-10-26 19:02:22,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:22" (2/3) ... [2020-10-26 19:02:22,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794931e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:02:22, skipping insertion in model container [2020-10-26 19:02:22,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:02:22" (3/3) ... [2020-10-26 19:02:22,945 INFO L111 eAbstractionObserver]: Analyzing ICFG mapavg3.i [2020-10-26 19:02:22,960 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:02:22,966 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:02:22,983 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:02:23,015 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:02:23,015 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:02:23,015 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:02:23,015 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:02:23,015 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:02:23,016 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:02:23,016 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:02:23,016 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:02:23,035 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-26 19:02:23,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:02:23,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:23,044 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:23,044 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:23,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:23,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1157692497, now seen corresponding path program 1 times [2020-10-26 19:02:23,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:23,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329026586] [2020-10-26 19:02:23,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:23,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:23,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:23,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:23,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:23,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:23,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:24,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:24,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:02:24,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:02:24,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1742 [2020-10-26 19:02:24,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:24,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:24,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:02:24,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:24,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:02:25,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:25,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:25,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:25,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:25,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:02:25,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:25,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:25,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:25,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:25,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:25,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:02:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:25,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:25,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:25,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:25,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:02:25,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:25,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:02:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:25,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:25,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-26 19:02:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:25,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:25,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:25,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:25,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:02:25,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:25,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:25,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:02:25,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:25,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:25,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:02:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:25,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:25,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:25,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:25,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 19:02:25,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:25,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:25,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:02:25,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:25,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:02:25,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329026586] [2020-10-26 19:02:25,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:02:25,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:02:25,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390822265] [2020-10-26 19:02:25,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:02:25,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:25,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:02:25,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:02:25,146 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-26 19:02:25,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:25,265 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2020-10-26 19:02:25,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:02:25,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-10-26 19:02:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:25,276 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:02:25,277 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:02:25,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:02:25,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:02:25,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-26 19:02:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 19:02:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-26 19:02:25,329 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2020-10-26 19:02:25,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:25,330 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-26 19:02:25,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:02:25,330 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-26 19:02:25,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:02:25,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:25,333 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:25,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:02:25,333 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:25,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:25,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1911757649, now seen corresponding path program 1 times [2020-10-26 19:02:25,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:25,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551721230] [2020-10-26 19:02:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:25,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:25,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:27,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:27,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:02:27,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:02:27,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2394 [2020-10-26 19:02:27,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:27,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:27,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:27,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:27,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:27,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:27,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:27,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:27,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:27,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:27,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:02:27,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:27,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:27,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:27,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:27,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:27,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:02:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:27,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:27,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:27,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:27,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:27,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:27,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 19:02:27,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:27,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:27,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:27,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:27,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:27,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-26 19:02:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:27,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:27,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:27,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:27,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:27,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:27,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 19:02:27,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:27,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:27,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:27,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:27,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:02:27,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:02:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:27,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:27,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:27,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:27,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:27,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:27,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 19:02:27,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:27,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:27,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:27,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:27,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:02:27,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551721230] [2020-10-26 19:02:27,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:02:27,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:02:27,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766421849] [2020-10-26 19:02:27,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:02:27,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:27,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:02:27,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:02:27,951 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-10-26 19:02:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:28,131 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-10-26 19:02:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:02:28,132 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-26 19:02:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:28,133 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:02:28,133 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:02:28,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:02:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:02:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-26 19:02:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:02:28,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-26 19:02:28,156 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 34 [2020-10-26 19:02:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:28,156 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-26 19:02:28,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:02:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-26 19:02:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:02:28,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:28,160 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:28,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:02:28,160 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:28,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:28,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2127198191, now seen corresponding path program 1 times [2020-10-26 19:02:28,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:28,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716697368] [2020-10-26 19:02:28,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:28,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:33,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:02:33,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:33,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:02:33,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:33,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:33,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:33,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:33,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:33,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:33,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:33,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:33,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:33,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:02:33,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:33,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:33,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:33,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:33,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:33,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-26 19:02:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:33,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:33,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:02:33,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:33,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 19:02:33,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:33,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:33,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-26 19:02:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:33,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:33,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:02:33,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:33,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 19:02:33,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:33,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:33,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:33,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:33,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:33,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:02:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:33,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:33,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:02:33,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:33,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 19:02:33,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:33,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:33,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:33,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:33,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:33,408 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 19:02:33,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716697368] [2020-10-26 19:02:33,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:33,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:02:33,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463761312] [2020-10-26 19:02:33,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:02:33,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:33,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:02:33,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:02:33,412 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-10-26 19:02:33,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:33,606 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-26 19:02:33,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:02:33,607 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-26 19:02:33,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:33,608 INFO L225 Difference]: With dead ends: 57 [2020-10-26 19:02:33,608 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:02:33,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:02:33,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:02:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-26 19:02:33,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:02:33,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-26 19:02:33,619 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 42 [2020-10-26 19:02:33,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:33,619 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-26 19:02:33,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:02:33,620 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-26 19:02:33,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:02:33,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:33,622 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 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 19:02:33,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:02:33,622 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:33,623 INFO L82 PathProgramCache]: Analyzing trace with hash 869573329, now seen corresponding path program 2 times [2020-10-26 19:02:33,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:33,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955768539] [2020-10-26 19:02:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:33,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:35,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:38,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:38,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:02:38,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:38,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:02:38,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:38,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:38,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:38,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:38,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:38,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:38,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:38,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:38,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:38,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:38,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:02:38,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:38,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:38,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:38,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:38,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:38,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-26 19:02:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:38,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:38,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:38,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:38,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:02:38,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:38,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 19:02:38,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:38,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:38,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:38,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:38,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:38,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 19:02:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:38,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:38,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:38,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:38,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:02:38,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:38,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 19:02:38,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:38,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:38,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:38,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:38,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:38,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:02:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:38,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:38,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:38,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:38,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:02:38,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:38,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 19:02:38,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:38,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:38,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:38,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:38,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 19:02:38,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955768539] [2020-10-26 19:02:38,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:38,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:02:38,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116277072] [2020-10-26 19:02:38,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:02:38,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:38,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:02:38,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:02:38,981 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2020-10-26 19:02:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:39,240 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-10-26 19:02:39,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:02:39,240 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-26 19:02:39,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:39,242 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:02:39,242 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:02:39,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:02:39,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:02:39,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-26 19:02:39,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:02:39,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-26 19:02:39,262 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 50 [2020-10-26 19:02:39,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:39,262 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-26 19:02:39,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:02:39,262 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-26 19:02:39,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:02:39,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:39,266 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:39,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:02:39,268 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:39,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:39,268 INFO L82 PathProgramCache]: Analyzing trace with hash 525822865, now seen corresponding path program 3 times [2020-10-26 19:02:39,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:39,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132602594] [2020-10-26 19:02:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:39,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:39,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:39,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:39,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:42,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:44,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:02:44,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:44,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:02:44,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:44,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:44,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:44,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:44,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:44,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:44,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:44,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:44,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:44,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:02:44,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:44,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:44,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:44,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:44,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:44,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-26 19:02:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:44,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:44,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:02:44,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:44,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 19:02:44,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:44,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:44,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:44,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:44,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:44,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-26 19:02:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:44,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:44,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:02:44,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:44,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 19:02:44,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:44,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:44,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:44,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:44,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:44,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:02:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:44,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:44,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:02:44,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:44,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 19:02:44,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:44,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:44,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:44,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:44,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 27 proven. 63 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-26 19:02:44,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132602594] [2020-10-26 19:02:44,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:44,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:02:44,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550178715] [2020-10-26 19:02:44,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:02:44,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:44,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:02:44,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:02:44,636 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 11 states. [2020-10-26 19:02:44,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:44,953 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2020-10-26 19:02:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:02:44,954 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-26 19:02:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:44,955 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:02:44,955 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:02:44,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:02:44,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:02:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-26 19:02:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:02:44,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-26 19:02:44,975 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 58 [2020-10-26 19:02:44,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:44,975 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-26 19:02:44,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:02:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-26 19:02:44,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:02:44,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:44,981 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:44,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:02:44,981 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:44,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:44,982 INFO L82 PathProgramCache]: Analyzing trace with hash 677700177, now seen corresponding path program 4 times [2020-10-26 19:02:44,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:44,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797891557] [2020-10-26 19:02:44,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:45,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:45,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:45,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:45,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:50,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:02:50,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:02:50,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:02:50,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:50,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:50,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:50,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:50,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:50,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:50,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:50,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:50,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:50,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:02:50,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:50,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:50,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:50,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:50,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:50,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-26 19:02:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:50,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:50,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:02:50,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:50,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 19:02:50,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:50,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:50,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:50,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:50,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:50,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 19:02:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:50,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:50,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:02:50,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:50,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-26 19:02:50,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:50,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:50,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:50,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:50,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:50,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:02:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:50,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:50,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:02:50,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:50,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-26 19:02:50,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:50,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:50,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:50,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:50,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 48 proven. 112 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-26 19:02:50,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797891557] [2020-10-26 19:02:50,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:50,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:02:50,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467060299] [2020-10-26 19:02:50,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:02:50,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:50,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:02:50,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:02:50,360 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 13 states. [2020-10-26 19:02:50,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:50,645 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-26 19:02:50,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:02:50,646 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-10-26 19:02:50,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:50,647 INFO L225 Difference]: With dead ends: 75 [2020-10-26 19:02:50,647 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:02:50,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:02:50,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:02:50,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-26 19:02:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:02:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-26 19:02:50,655 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 66 [2020-10-26 19:02:50,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:50,656 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-26 19:02:50,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:02:50,656 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-26 19:02:50,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:02:50,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:50,658 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:50,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:02:50,658 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:50,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:50,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1925449489, now seen corresponding path program 5 times [2020-10-26 19:02:50,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:50,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823184989] [2020-10-26 19:02:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:50,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:55,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:55,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:02:55,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:02:55,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:02:55,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:55,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:55,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:55,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:55,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:55,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:55,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:55,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:55,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:55,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:55,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:02:55,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:55,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:55,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:55,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:55,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:55,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-26 19:02:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:55,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:55,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:55,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:55,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:02:55,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:55,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 19:02:55,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:55,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:55,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:55,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:55,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:55,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:02:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:55,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:55,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:56,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:02:56,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:56,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-26 19:02:56,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:56,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:56,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:56,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:56,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:56,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:02:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:56,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:56,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:02:56,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:56,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 19:02:56,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:56,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:56,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:56,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:56,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 75 proven. 175 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 19:02:56,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823184989] [2020-10-26 19:02:56,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:56,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:02:56,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658319860] [2020-10-26 19:02:56,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:02:56,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:56,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:02:56,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:02:56,154 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 15 states. [2020-10-26 19:02:56,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:56,545 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-26 19:02:56,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:02:56,546 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2020-10-26 19:02:56,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:56,547 INFO L225 Difference]: With dead ends: 81 [2020-10-26 19:02:56,547 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:02:56,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:02:56,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:02:56,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-26 19:02:56,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:02:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-26 19:02:56,556 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 74 [2020-10-26 19:02:56,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:56,556 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-26 19:02:56,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:02:56,557 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-26 19:02:56,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:02:56,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:56,558 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:56,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:02:56,558 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:56,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:56,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1364974033, now seen corresponding path program 6 times [2020-10-26 19:02:56,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:56,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584351804] [2020-10-26 19:02:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:56,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:01,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:01,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:03:01,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:01,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:03:01,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:01,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:03:01,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:01,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:03:01,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:01,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:01,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:01,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:01,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:01,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:01,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:01,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:01,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:01,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:01,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:01,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:01,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 19:03:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:01,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:01,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:01,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:01,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:03:01,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:01,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-26 19:03:01,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:01,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:03:01,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:01,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:03:01,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:01,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:03:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:01,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:01,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:01,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:01,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:03:01,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:01,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-26 19:03:01,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:01,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:03:01,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:01,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:03:01,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:01,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:03:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:01,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:01,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:02,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:03:02,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:02,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-26 19:03:02,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:02,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:03:02,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:02,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:03:02,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 108 proven. 252 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:03:02,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584351804] [2020-10-26 19:03:02,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:02,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:03:02,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184819130] [2020-10-26 19:03:02,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:03:02,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:02,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:03:02,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:03:02,078 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 17 states. [2020-10-26 19:03:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:02,576 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-26 19:03:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:03:02,577 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-10-26 19:03:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:02,579 INFO L225 Difference]: With dead ends: 87 [2020-10-26 19:03:02,580 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:03:02,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:03:02,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:03:02,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-26 19:03:02,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:03:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-26 19:03:02,594 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 82 [2020-10-26 19:03:02,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:02,594 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-26 19:03:02,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:03:02,594 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-26 19:03:02,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:03:02,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:02,600 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:02,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:03:02,601 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:02,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:02,603 INFO L82 PathProgramCache]: Analyzing trace with hash 909335185, now seen corresponding path program 7 times [2020-10-26 19:03:02,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:02,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694941823] [2020-10-26 19:03:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:02,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:07,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:07,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:03:07,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:07,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:03:07,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:07,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:03:07,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:07,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:03:07,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:07,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:07,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:07,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:07,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:07,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:07,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:07,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:07,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:07,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:07,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:07,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:07,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 19:03:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:07,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:07,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:07,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:07,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:03:07,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:07,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-26 19:03:07,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:07,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:03:07,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:07,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:03:07,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:08,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:03:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:08,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:08,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:03:08,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:08,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-26 19:03:08,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:08,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:03:08,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:08,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:03:08,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:08,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:03:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:08,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:08,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:03:08,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:08,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-26 19:03:08,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:08,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:03:08,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:08,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:03:08,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 147 proven. 343 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-26 19:03:08,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694941823] [2020-10-26 19:03:08,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:08,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:03:08,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809477777] [2020-10-26 19:03:08,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:03:08,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:08,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:03:08,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:03:08,255 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 19 states. [2020-10-26 19:03:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:08,787 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-10-26 19:03:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:03:08,788 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 90 [2020-10-26 19:03:08,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:08,789 INFO L225 Difference]: With dead ends: 93 [2020-10-26 19:03:08,789 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:03:08,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:03:08,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:03:08,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-26 19:03:08,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:03:08,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-26 19:03:08,809 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 90 [2020-10-26 19:03:08,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:08,809 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-26 19:03:08,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:03:08,810 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-26 19:03:08,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:03:08,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:08,814 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:08,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:03:08,815 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:08,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:08,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1569617583, now seen corresponding path program 8 times [2020-10-26 19:03:08,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:08,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895498281] [2020-10-26 19:03:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:08,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:13,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:13,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:03:13,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:13,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:03:13,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:13,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:13,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:13,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:13,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:13,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:14,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:14,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:14,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:14,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:14,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:14,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:14,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:14,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:14,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:14,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:14,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:03:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:14,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:14,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:14,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:14,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:03:14,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:14,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-26 19:03:14,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:14,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:14,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:14,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:14,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:14,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:03:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:14,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:14,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:14,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:14,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:03:14,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:14,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-26 19:03:14,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:14,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:14,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:14,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:14,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:14,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:03:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:14,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:14,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:14,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:14,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:03:14,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:14,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-26 19:03:14,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:14,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:14,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:14,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:14,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 192 proven. 448 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-26 19:03:14,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895498281] [2020-10-26 19:03:14,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:14,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:03:14,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230158848] [2020-10-26 19:03:14,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:03:14,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:14,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:03:14,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:03:14,457 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 21 states. [2020-10-26 19:03:15,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:15,146 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2020-10-26 19:03:15,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:03:15,147 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 98 [2020-10-26 19:03:15,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:15,148 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:03:15,148 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:03:15,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:03:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:03:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-26 19:03:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:03:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-26 19:03:15,158 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 98 [2020-10-26 19:03:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:15,158 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-26 19:03:15,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:03:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-26 19:03:15,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 19:03:15,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:15,160 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:15,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:03:15,160 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:15,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:15,161 INFO L82 PathProgramCache]: Analyzing trace with hash 375219729, now seen corresponding path program 9 times [2020-10-26 19:03:15,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:15,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259097658] [2020-10-26 19:03:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:15,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:15,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:15,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:15,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:20,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 19:03:20,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:20,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:03:20,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:20,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:20,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:20,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:20,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:20,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:20,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:20,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:20,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:20,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:20,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:20,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:20,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:20,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:20,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:20,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 19:03:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:20,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:20,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:03:20,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:20,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-26 19:03:20,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:20,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:20,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:20,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:20,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:20,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:03:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:20,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:20,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:03:20,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:20,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-26 19:03:20,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:20,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:20,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:20,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:20,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:20,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:03:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:20,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:20,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:20,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:03:20,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:20,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-26 19:03:20,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:20,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 243 proven. 567 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-26 19:03:20,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259097658] [2020-10-26 19:03:20,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:20,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:03:20,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134496239] [2020-10-26 19:03:20,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:03:20,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:20,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:03:20,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:03:20,911 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 23 states. [2020-10-26 19:03:21,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:21,654 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2020-10-26 19:03:21,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:03:21,655 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-10-26 19:03:21,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:21,655 INFO L225 Difference]: With dead ends: 105 [2020-10-26 19:03:21,656 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:03:21,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:03:21,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:03:21,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-26 19:03:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:03:21,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-26 19:03:21,671 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 106 [2020-10-26 19:03:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:21,672 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-26 19:03:21,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:03:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-26 19:03:21,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-26 19:03:21,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:21,677 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:21,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:03:21,677 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:21,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:21,678 INFO L82 PathProgramCache]: Analyzing trace with hash 22933713, now seen corresponding path program 10 times [2020-10-26 19:03:21,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:21,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454227760] [2020-10-26 19:03:21,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:21,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:21,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:21,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:21,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:26,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:26,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 19:03:26,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:26,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:03:26,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:26,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:26,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:26,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:26,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:26,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:26,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:26,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:26,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:26,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:26,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:26,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:26,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:26,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 19:03:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:26,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:26,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:27,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:27,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:03:27,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:27,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-26 19:03:27,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:27,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:27,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:27,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:27,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:27,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:03:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:27,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:27,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:27,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:27,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:03:27,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:27,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-26 19:03:27,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:27,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:27,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:27,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:27,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:27,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 19:03:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:27,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:27,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:27,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:27,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:03:27,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:27,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 19:03:27,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:27,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:27,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:27,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:27,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 300 proven. 700 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-26 19:03:27,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454227760] [2020-10-26 19:03:27,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:27,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:03:27,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239079435] [2020-10-26 19:03:27,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:03:27,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:27,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:03:27,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:03:27,707 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 25 states. [2020-10-26 19:03:28,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:28,433 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2020-10-26 19:03:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:03:28,434 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 114 [2020-10-26 19:03:28,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:28,435 INFO L225 Difference]: With dead ends: 111 [2020-10-26 19:03:28,435 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:03:28,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:03:28,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:03:28,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-26 19:03:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:03:28,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-26 19:03:28,445 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 114 [2020-10-26 19:03:28,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:28,445 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-26 19:03:28,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:03:28,445 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-26 19:03:28,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 19:03:28,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:28,447 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:28,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:03:28,447 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:28,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1309005423, now seen corresponding path program 11 times [2020-10-26 19:03:28,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:28,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338679489] [2020-10-26 19:03:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:28,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:28,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:28,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:28,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:33,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:33,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 19:03:33,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:33,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:03:33,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:33,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:33,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:33,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:33,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:33,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:33,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:33,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:33,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:33,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:33,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:03:33,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:33,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:33,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:33,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:33,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:33,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:03:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:33,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:33,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:33,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:33,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:03:33,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:33,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-26 19:03:33,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:33,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:33,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:33,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:33,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:03:34,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:03:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:34,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:34,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:34,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:34,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:03:34,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:34,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-26 19:03:34,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:34,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:34,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:34,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:34,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:34,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 19:03:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:34,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:34,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:34,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:34,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:03:34,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:34,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-26 19:03:34,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:34,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:34,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:34,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:34,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 363 proven. 847 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-26 19:03:34,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338679489] [2020-10-26 19:03:34,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:34,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:03:34,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375874361] [2020-10-26 19:03:34,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:03:34,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:34,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:03:34,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:03:34,581 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 27 states. [2020-10-26 19:03:35,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:35,495 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2020-10-26 19:03:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:03:35,495 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-10-26 19:03:35,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:35,496 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:03:35,496 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:03:35,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:03:35,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:03:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-26 19:03:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:03:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-26 19:03:35,518 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 122 [2020-10-26 19:03:35,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:35,519 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-26 19:03:35,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:03:35,519 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-26 19:03:35,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-26 19:03:35,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:35,521 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:35,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:03:35,521 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:35,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:35,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1171853393, now seen corresponding path program 12 times [2020-10-26 19:03:35,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:35,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117392381] [2020-10-26 19:03:35,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:35,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:35,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:35,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:35,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:40,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:40,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 19:03:40,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:40,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:03:40,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:40,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:40,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:40,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:40,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:40,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:40,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:40,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:40,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:40,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:40,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:40,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:40,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:40,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:40,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:40,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:40,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:03:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:40,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:40,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:40,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:40,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:03:40,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:40,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-26 19:03:40,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:40,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:40,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:40,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:40,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:41,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 19:03:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:41,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:41,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:41,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:41,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:03:41,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:41,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-26 19:03:41,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:41,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:41,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:41,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:41,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:41,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-26 19:03:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:41,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:41,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:41,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:41,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:03:41,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:41,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-26 19:03:41,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:41,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:41,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:41,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:41,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 432 proven. 1008 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-26 19:03:41,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117392381] [2020-10-26 19:03:41,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:41,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:03:41,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383332736] [2020-10-26 19:03:41,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:03:41,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:41,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:03:41,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:03:41,572 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 29 states. [2020-10-26 19:03:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:42,540 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2020-10-26 19:03:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:03:42,541 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 130 [2020-10-26 19:03:42,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:42,542 INFO L225 Difference]: With dead ends: 123 [2020-10-26 19:03:42,543 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:03:42,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:03:42,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:03:42,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-26 19:03:42,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:03:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-26 19:03:42,554 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 130 [2020-10-26 19:03:42,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:42,554 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-26 19:03:42,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:03:42,554 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-26 19:03:42,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-26 19:03:42,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:42,556 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:42,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:03:42,556 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:42,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:42,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1715362543, now seen corresponding path program 13 times [2020-10-26 19:03:42,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:42,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105159768] [2020-10-26 19:03:42,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:42,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:42,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:42,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:42,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:47,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:47,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-26 19:03:47,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:47,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:03:47,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:47,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:47,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:47,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:47,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:47,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:47,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:47,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:47,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:47,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:47,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:47,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:47,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:47,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:47,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:47,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:47,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:03:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:47,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:47,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:47,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:47,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:03:47,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:47,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-26 19:03:47,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:47,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:47,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:47,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:47,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:48,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:03:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:48,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:48,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:48,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:48,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:03:48,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:48,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-26 19:03:48,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:48,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:48,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:48,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:48,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:48,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 19:03:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:48,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:48,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:48,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:48,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:03:48,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:48,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-26 19:03:48,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:48,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1783 backedges. 507 proven. 1183 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-26 19:03:48,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105159768] [2020-10-26 19:03:48,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:48,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:03:48,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919243645] [2020-10-26 19:03:48,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:03:48,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:48,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:03:48,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:03:48,692 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 31 states. [2020-10-26 19:03:49,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:49,713 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2020-10-26 19:03:49,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:03:49,713 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 138 [2020-10-26 19:03:49,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:49,714 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:03:49,715 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:03:49,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:03:49,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:03:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-26 19:03:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:03:49,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-26 19:03:49,731 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 138 [2020-10-26 19:03:49,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:49,731 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-26 19:03:49,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:03:49,731 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-26 19:03:49,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-26 19:03:49,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:49,747 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:49,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:03:49,747 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:49,748 INFO L82 PathProgramCache]: Analyzing trace with hash 966453201, now seen corresponding path program 14 times [2020-10-26 19:03:49,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:49,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416793263] [2020-10-26 19:03:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:49,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:49,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:49,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:49,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:54,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:54,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 19:03:54,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:54,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-26 19:03:54,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:54,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:54,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:54,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:54,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:55,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:55,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:55,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:55,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:55,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:55,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:55,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:55,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:55,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:55,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:55,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:55,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:03:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:55,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:55,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:55,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:55,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:03:55,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:55,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-26 19:03:55,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:55,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:55,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:55,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:55,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:55,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-26 19:03:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:55,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:55,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:55,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:55,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:03:55,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:55,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-26 19:03:55,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:55,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:55,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:55,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:55,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:55,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-26 19:03:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:55,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:55,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:55,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:55,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:03:55,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:55,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-26 19:03:55,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:55,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:55,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:55,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:55,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 588 proven. 1372 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-10-26 19:03:55,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416793263] [2020-10-26 19:03:55,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:55,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:03:55,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039900833] [2020-10-26 19:03:55,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:03:55,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:55,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:03:55,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:03:55,967 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 33 states. [2020-10-26 19:03:57,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:57,104 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2020-10-26 19:03:57,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:03:57,110 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 146 [2020-10-26 19:03:57,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:57,112 INFO L225 Difference]: With dead ends: 135 [2020-10-26 19:03:57,112 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:03:57,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:03:57,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:03:57,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-26 19:03:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:03:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-26 19:03:57,120 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 146 [2020-10-26 19:03:57,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:57,121 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-26 19:03:57,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:03:57,121 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-26 19:03:57,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-26 19:03:57,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:57,123 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:03:57,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:03:57,124 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:57,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:57,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1349245073, now seen corresponding path program 15 times [2020-10-26 19:03:57,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:57,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850182112] [2020-10-26 19:03:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:57,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:57,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:57,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:57,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:02,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:02,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-26 19:04:02,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:02,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-26 19:04:02,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:02,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:04:02,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:02,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:04:02,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:02,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:02,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:02,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:02,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:02,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:02,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:02,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:02,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:02,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:02,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:02,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:02,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:04:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:02,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:02,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:02,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:02,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:04:02,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:02,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-26 19:04:02,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:02,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:04:02,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:02,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:04:02,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:03,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 19:04:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:03,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:03,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:03,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:03,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:04:03,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:03,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-26 19:04:03,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:03,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:04:03,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:03,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:04:03,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:03,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-26 19:04:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:03,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:03,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:03,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:03,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:04:03,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:03,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-26 19:04:03,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:03,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:04:03,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:03,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:04:03,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 675 proven. 1575 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-26 19:04:03,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850182112] [2020-10-26 19:04:03,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:03,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:04:03,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076102851] [2020-10-26 19:04:03,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:04:03,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:03,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:04:03,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:04:03,712 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 35 states. [2020-10-26 19:04:04,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:04,975 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2020-10-26 19:04:04,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:04:04,975 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 154 [2020-10-26 19:04:04,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:04,977 INFO L225 Difference]: With dead ends: 141 [2020-10-26 19:04:04,977 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:04:04,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=611, Invalid=1939, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:04:04,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:04:04,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-26 19:04:04,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:04:04,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-10-26 19:04:04,986 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 154 [2020-10-26 19:04:04,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:04,987 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-10-26 19:04:04,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:04:04,987 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-10-26 19:04:04,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-26 19:04:04,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:04,989 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 16, 16, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:04,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:04:04,989 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:04,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:04,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1738836143, now seen corresponding path program 16 times [2020-10-26 19:04:04,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:04,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350828176] [2020-10-26 19:04:04,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:05,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:05,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:05,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:05,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:10,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:10,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-26 19:04:10,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:10,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-26 19:04:10,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:10,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:04:10,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:10,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:04:10,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:10,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:10,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:10,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:10,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:10,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:10,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:10,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:10,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:10,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:10,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:10,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:10,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:04:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:10,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:10,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:10,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:10,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:04:10,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:10,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-26 19:04:10,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:10,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:04:10,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:10,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:04:10,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:11,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-26 19:04:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:11,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:11,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:11,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:11,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:04:11,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:11,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-26 19:04:11,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:11,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:04:11,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:11,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:04:11,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:11,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-26 19:04:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:11,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:11,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:11,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:11,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:04:11,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:11,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-26 19:04:11,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:11,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:04:11,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:11,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:04:11,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2671 backedges. 768 proven. 1792 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-10-26 19:04:11,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350828176] [2020-10-26 19:04:11,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:11,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:04:11,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33530786] [2020-10-26 19:04:11,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:04:11,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:11,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:04:11,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:04:11,735 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 37 states. [2020-10-26 19:04:12,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:12,869 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2020-10-26 19:04:12,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:04:12,869 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 162 [2020-10-26 19:04:12,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:12,871 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:04:12,871 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:04:12,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:04:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:04:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-26 19:04:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:04:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-26 19:04:12,879 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 162 [2020-10-26 19:04:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:12,879 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-26 19:04:12,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:04:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-26 19:04:12,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-26 19:04:12,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:12,882 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 17, 17, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:12,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:04:12,882 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:12,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:12,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1253098513, now seen corresponding path program 17 times [2020-10-26 19:04:12,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:12,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225115560] [2020-10-26 19:04:12,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:12,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:12,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:13,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:13,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:17,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:17,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-26 19:04:17,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:17,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-26 19:04:17,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:17,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:17,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:17,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:17,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:18,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:18,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:18,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:18,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:18,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:18,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:18,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:18,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:18,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:18,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:18,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:18,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:04:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:18,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:18,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:18,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:18,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:04:18,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:18,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-26 19:04:18,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:18,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:18,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:18,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:18,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:19,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-26 19:04:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:19,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:19,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:19,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:19,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:04:19,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:19,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-26 19:04:19,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:19,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:19,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:19,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:19,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:19,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-26 19:04:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:19,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:19,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:19,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:19,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:04:19,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:19,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-26 19:04:19,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:19,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:19,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:19,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:19,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3007 backedges. 867 proven. 2023 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-26 19:04:19,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225115560] [2020-10-26 19:04:19,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:19,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:04:19,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5419401] [2020-10-26 19:04:19,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:04:19,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:19,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:04:19,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:04:19,614 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 39 states. [2020-10-26 19:04:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:21,131 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2020-10-26 19:04:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:04:21,132 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 170 [2020-10-26 19:04:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:21,133 INFO L225 Difference]: With dead ends: 153 [2020-10-26 19:04:21,133 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:04:21,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=759, Invalid=2433, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:04:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:04:21,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-10-26 19:04:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:04:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-10-26 19:04:21,142 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 170 [2020-10-26 19:04:21,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:21,142 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-10-26 19:04:21,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:04:21,142 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-10-26 19:04:21,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-26 19:04:21,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:21,144 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 18, 18, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:21,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:04:21,144 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:21,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:21,145 INFO L82 PathProgramCache]: Analyzing trace with hash 265469649, now seen corresponding path program 18 times [2020-10-26 19:04:21,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:21,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445154325] [2020-10-26 19:04:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:21,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:21,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:21,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:21,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:26,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:26,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-26 19:04:26,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:26,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:04:26,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:26,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:26,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:26,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:26,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:26,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:26,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:26,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:26,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:26,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:26,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:26,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:26,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:26,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:26,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:26,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:26,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:04:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:26,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:26,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:27,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:27,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:04:27,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:27,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-26 19:04:27,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:27,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:27,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:27,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:27,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:27,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-26 19:04:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:27,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:27,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:27,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:27,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:04:27,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:27,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-26 19:04:27,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:27,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:27,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:27,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:27,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:27,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-26 19:04:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:27,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:27,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:28,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:28,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:04:28,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:28,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-26 19:04:28,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:28,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:28,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:28,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:28,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3363 backedges. 972 proven. 2268 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-26 19:04:28,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445154325] [2020-10-26 19:04:28,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:28,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:04:28,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41940159] [2020-10-26 19:04:28,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:04:28,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:28,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:04:28,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:04:28,346 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 41 states. [2020-10-26 19:04:29,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:29,980 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2020-10-26 19:04:29,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:04:29,980 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 178 [2020-10-26 19:04:29,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:29,981 INFO L225 Difference]: With dead ends: 159 [2020-10-26 19:04:29,981 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:04:29,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:04:29,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:04:29,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-26 19:04:29,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:04:29,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-26 19:04:29,993 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 178 [2020-10-26 19:04:29,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:29,995 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-26 19:04:29,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:04:29,995 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-26 19:04:29,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-26 19:04:29,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:29,997 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:29,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:04:29,997 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:29,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:29,998 INFO L82 PathProgramCache]: Analyzing trace with hash -280467567, now seen corresponding path program 19 times [2020-10-26 19:04:29,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:29,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763834458] [2020-10-26 19:04:29,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:30,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:30,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:30,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:30,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:35,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:35,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-26 19:04:35,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:35,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-26 19:04:35,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:35,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:35,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:35,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:35,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:35,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:35,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:35,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:35,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:35,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:35,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:04:35,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:35,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:35,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:35,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:35,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:35,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:04:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:35,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:35,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:35,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:35,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:04:35,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:35,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-26 19:04:35,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:35,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:35,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:35,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:35,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:36,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-10-26 19:04:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:36,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:36,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:36,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:36,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:04:36,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:36,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-26 19:04:36,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:36,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:36,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:36,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:36,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:36,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 19:04:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:36,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:36,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:37,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:37,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:04:37,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:37,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-10-26 19:04:37,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:37,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:37,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:37,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:37,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3739 backedges. 1083 proven. 2527 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-10-26 19:04:37,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763834458] [2020-10-26 19:04:37,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:37,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:04:37,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135704334] [2020-10-26 19:04:37,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:04:37,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:37,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:04:37,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1343, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:04:37,317 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 43 states. [2020-10-26 19:04:38,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:38,904 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2020-10-26 19:04:38,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:04:38,905 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 186 [2020-10-26 19:04:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:38,906 INFO L225 Difference]: With dead ends: 165 [2020-10-26 19:04:38,906 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:04:38,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:04:38,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:04:38,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2020-10-26 19:04:38,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:04:38,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-10-26 19:04:38,916 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 186 [2020-10-26 19:04:38,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:38,917 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-10-26 19:04:38,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:04:38,917 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-10-26 19:04:38,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-26 19:04:38,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:38,918 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 20, 20, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:38,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:04:38,918 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:38,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:38,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1069071953, now seen corresponding path program 20 times [2020-10-26 19:04:38,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:38,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410150297] [2020-10-26 19:04:38,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:38,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:39,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:39,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:39,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:44,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:44,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-26 19:04:44,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:44,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-26 19:04:44,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:44,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:44,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:44,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:44,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:44,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:44,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:44,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:44,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:44,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:44,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:44,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:44,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:44,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:44,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:44,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:44,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:04:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:44,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:44,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:44,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:44,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:04:44,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:44,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-26 19:04:44,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:44,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:44,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:44,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:44,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:45,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-26 19:04:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:45,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:45,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:45,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:45,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:04:45,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:45,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-26 19:04:45,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:45,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:45,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:45,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:45,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:45,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-10-26 19:04:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:45,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:45,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:46,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:46,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:04:46,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:46,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-26 19:04:46,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:46,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:46,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:46,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:46,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4135 backedges. 1200 proven. 2800 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-10-26 19:04:46,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410150297] [2020-10-26 19:04:46,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:46,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:04:46,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966627881] [2020-10-26 19:04:46,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:04:46,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:46,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:04:46,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:04:46,282 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 45 states. [2020-10-26 19:04:48,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:48,157 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2020-10-26 19:04:48,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:04:48,158 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 194 [2020-10-26 19:04:48,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:48,159 INFO L225 Difference]: With dead ends: 171 [2020-10-26 19:04:48,160 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:04:48,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2020-10-26 19:04:48,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:04:48,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-10-26 19:04:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:04:48,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-10-26 19:04:48,169 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 194 [2020-10-26 19:04:48,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:48,169 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-10-26 19:04:48,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:04:48,170 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-10-26 19:04:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-26 19:04:48,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:48,171 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 21, 21, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:48,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:04:48,171 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:48,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:48,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1762999535, now seen corresponding path program 21 times [2020-10-26 19:04:48,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:48,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661042740] [2020-10-26 19:04:48,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:48,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:48,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:48,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:48,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:53,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:53,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-26 19:04:53,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:53,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:04:53,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:53,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:53,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:53,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:53,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:53,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:53,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:53,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:53,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:53,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:53,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:53,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:53,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:53,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:53,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:53,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:53,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:04:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:53,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:53,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:54,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:54,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:04:54,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:54,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-26 19:04:54,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:54,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:54,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:54,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:54,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-26 19:04:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:54,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:54,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:55,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:55,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:04:55,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:55,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-26 19:04:55,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:55,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:55,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:55,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:55,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:55,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-10-26 19:04:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:55,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:55,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:55,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:55,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:04:55,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:55,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 680 [2020-10-26 19:04:55,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:55,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:55,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:55,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:55,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4551 backedges. 1323 proven. 3087 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-10-26 19:04:56,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661042740] [2020-10-26 19:04:56,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:56,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:04:56,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386601835] [2020-10-26 19:04:56,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:04:56,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:56,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:04:56,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=1609, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:04:56,039 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 47 states. [2020-10-26 19:04:57,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:57,960 INFO L93 Difference]: Finished difference Result 177 states and 189 transitions. [2020-10-26 19:04:57,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:04:57,960 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 202 [2020-10-26 19:04:57,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:57,962 INFO L225 Difference]: With dead ends: 177 [2020-10-26 19:04:57,962 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:04:57,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1103, Invalid=3589, Unknown=0, NotChecked=0, Total=4692 [2020-10-26 19:04:57,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:04:57,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2020-10-26 19:04:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:04:57,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2020-10-26 19:04:57,971 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 202 [2020-10-26 19:04:57,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:57,971 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2020-10-26 19:04:57,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:04:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2020-10-26 19:04:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-26 19:04:57,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:57,973 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:04:57,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:04:57,973 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:57,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1178241583, now seen corresponding path program 22 times [2020-10-26 19:04:57,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:57,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643714893] [2020-10-26 19:04:57,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:58,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:58,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:58,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:58,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:03,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:03,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-26 19:05:03,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:03,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-26 19:05:03,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:03,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:05:03,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:03,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:05:03,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:03,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:03,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:03,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:03,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:03,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:03,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:03,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:03,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:03,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:03,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:03,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:03,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:05:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:03,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:03,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:04,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:04,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:05:04,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:04,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-26 19:05:04,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:04,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:05:04,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:04,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:05:04,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:04,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-10-26 19:05:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:04,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:04,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:05,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:05,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:05:05,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:05,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-26 19:05:05,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:05,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:05:05,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:05,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:05:05,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:05,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 19:05:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:05,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:05,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:05,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:05,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:05:05,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:05,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 411 [2020-10-26 19:05:05,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:05,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:05:05,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:05,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:05:05,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4987 backedges. 1452 proven. 3388 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-26 19:05:05,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643714893] [2020-10-26 19:05:05,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:05,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 19:05:05,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52469922] [2020-10-26 19:05:05,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 19:05:05,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:05,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 19:05:05,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=1751, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:05:05,813 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 49 states. [2020-10-26 19:05:07,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:07,794 INFO L93 Difference]: Finished difference Result 183 states and 195 transitions. [2020-10-26 19:05:07,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:05:07,794 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 210 [2020-10-26 19:05:07,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:07,795 INFO L225 Difference]: With dead ends: 183 [2020-10-26 19:05:07,795 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:05:07,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2020-10-26 19:05:07,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:05:07,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2020-10-26 19:05:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:05:07,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2020-10-26 19:05:07,807 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 210 [2020-10-26 19:05:07,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:07,807 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2020-10-26 19:05:07,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 19:05:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2020-10-26 19:05:07,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-26 19:05:07,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:07,809 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 23, 23, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:07,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:05:07,811 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:07,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:07,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1940924783, now seen corresponding path program 23 times [2020-10-26 19:05:07,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:07,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540121145] [2020-10-26 19:05:07,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:07,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:07,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:08,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:08,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:12,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:12,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-26 19:05:12,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:12,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5122 [2020-10-26 19:05:12,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:12,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:05:12,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:12,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:05:12,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:13,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:13,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:13,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:13,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:13,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:13,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:13,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:13,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:13,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:13,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:13,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:13,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:05:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:13,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:13,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:13,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:13,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:05:13,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:13,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-26 19:05:13,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:13,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:05:13,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:13,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:05:13,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:14,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-26 19:05:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:14,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:14,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:15,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:15,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:05:15,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:15,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 491 [2020-10-26 19:05:15,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:15,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:05:15,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:15,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:05:15,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:15,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-10-26 19:05:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:15,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:15,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:15,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:15,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:05:15,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:15,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-26 19:05:15,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:15,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:05:15,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:15,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:05:15,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5443 backedges. 1587 proven. 3703 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-26 19:05:15,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540121145] [2020-10-26 19:05:15,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:15,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-26 19:05:15,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174403239] [2020-10-26 19:05:15,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-26 19:05:15,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:15,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-26 19:05:15,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=1899, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:05:15,972 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 51 states. [2020-10-26 19:05:18,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:18,200 INFO L93 Difference]: Finished difference Result 189 states and 201 transitions. [2020-10-26 19:05:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:05:18,201 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 218 [2020-10-26 19:05:18,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:18,202 INFO L225 Difference]: With dead ends: 189 [2020-10-26 19:05:18,203 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:05:18,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1299, Invalid=4251, Unknown=0, NotChecked=0, Total=5550 [2020-10-26 19:05:18,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:05:18,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-26 19:05:18,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:05:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-10-26 19:05:18,211 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 218 [2020-10-26 19:05:18,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:18,211 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-10-26 19:05:18,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-26 19:05:18,211 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-10-26 19:05:18,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-26 19:05:18,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:18,213 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 24, 24, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:18,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:05:18,213 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:18,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:18,214 INFO L82 PathProgramCache]: Analyzing trace with hash 28370257, now seen corresponding path program 24 times [2020-10-26 19:05:18,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:18,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635705139] [2020-10-26 19:05:18,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:18,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:18,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:18,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:18,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:23,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:23,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-26 19:05:23,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:23,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-26 19:05:23,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:23,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:05:23,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:23,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:05:23,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:23,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:23,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:23,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:23,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:23,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:23,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:23,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:23,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:23,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:23,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:23,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:23,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:05:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:23,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:23,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:24,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:24,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:05:24,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:24,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 522 [2020-10-26 19:05:24,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:05:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:05:24,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:25,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-10-26 19:05:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:25,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:25,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:25,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:25,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:05:25,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:25,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-26 19:05:25,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:25,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:05:25,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:25,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:05:25,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:25,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-10-26 19:05:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:25,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:25,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:26,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:26,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:05:26,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:26,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-10-26 19:05:26,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:26,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:05:26,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:26,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:05:26,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5919 backedges. 1728 proven. 4032 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-10-26 19:05:26,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635705139] [2020-10-26 19:05:26,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:26,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-26 19:05:26,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794387806] [2020-10-26 19:05:26,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-26 19:05:26,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:26,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-26 19:05:26,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=2053, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:05:26,692 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 53 states. [2020-10-26 19:05:28,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:28,792 INFO L93 Difference]: Finished difference Result 195 states and 207 transitions. [2020-10-26 19:05:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:05:28,793 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 226 [2020-10-26 19:05:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:28,794 INFO L225 Difference]: With dead ends: 195 [2020-10-26 19:05:28,794 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 19:05:28,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2020-10-26 19:05:28,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 19:05:28,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-10-26 19:05:28,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:05:28,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-10-26 19:05:28,808 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 226 [2020-10-26 19:05:28,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:28,808 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-10-26 19:05:28,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-26 19:05:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-10-26 19:05:28,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-26 19:05:28,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:28,810 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 25, 25, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:28,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:05:28,810 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:28,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:28,811 INFO L82 PathProgramCache]: Analyzing trace with hash 204448273, now seen corresponding path program 25 times [2020-10-26 19:05:28,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:28,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818453304] [2020-10-26 19:05:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:28,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:28,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:29,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:29,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:33,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:33,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 19:05:33,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:33,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-26 19:05:33,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:33,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:33,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:33,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:33,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:34,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:34,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:34,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:34,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:34,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:34,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:34,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:34,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:34,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:34,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:34,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:34,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:05:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:34,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:34,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:34,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:34,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:05:34,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:34,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-26 19:05:34,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:34,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:36,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-10-26 19:05:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:36,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:36,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:36,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:36,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:05:36,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:36,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-26 19:05:36,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:36,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:36,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:36,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:36,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:36,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-26 19:05:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:36,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:36,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:36,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:36,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:05:36,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:36,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-10-26 19:05:36,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:36,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:36,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:36,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:36,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6415 backedges. 1875 proven. 4375 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2020-10-26 19:05:37,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818453304] [2020-10-26 19:05:37,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:37,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-26 19:05:37,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946234551] [2020-10-26 19:05:37,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-26 19:05:37,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:37,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-26 19:05:37,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=2213, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:05:37,029 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 55 states. [2020-10-26 19:05:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:39,506 INFO L93 Difference]: Finished difference Result 201 states and 213 transitions. [2020-10-26 19:05:39,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:05:39,506 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 234 [2020-10-26 19:05:39,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:39,508 INFO L225 Difference]: With dead ends: 201 [2020-10-26 19:05:39,508 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:05:39,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2020-10-26 19:05:39,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:05:39,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-26 19:05:39,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:05:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2020-10-26 19:05:39,518 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 234 [2020-10-26 19:05:39,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:39,518 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2020-10-26 19:05:39,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-26 19:05:39,519 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2020-10-26 19:05:39,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-26 19:05:39,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:39,520 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 26, 26, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:39,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:05:39,521 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:39,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:39,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1926034223, now seen corresponding path program 26 times [2020-10-26 19:05:39,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:39,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564234967] [2020-10-26 19:05:39,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:39,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:39,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:39,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:39,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:44,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:44,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-26 19:05:44,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:44,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:05:44,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:44,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:44,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:44,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:44,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:45,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:45,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:45,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:45,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:45,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:45,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:45,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:45,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:45,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:45,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:45,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:45,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:05:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:45,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:45,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:45,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:45,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:05:45,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:45,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-26 19:05:45,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:45,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:45,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:45,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:45,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:46,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-26 19:05:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:46,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:46,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:47,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:47,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:05:47,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:47,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 653 [2020-10-26 19:05:47,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:47,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:47,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:47,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:47,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:47,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 19:05:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:47,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:47,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:48,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:48,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:05:48,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:48,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-26 19:05:48,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:48,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:48,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:48,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:48,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6931 backedges. 2028 proven. 4732 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-26 19:05:48,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564234967] [2020-10-26 19:05:48,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:48,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-26 19:05:48,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415314765] [2020-10-26 19:05:48,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-26 19:05:48,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:48,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-26 19:05:48,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=2379, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:05:48,203 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 57 states. [2020-10-26 19:05:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:50,842 INFO L93 Difference]: Finished difference Result 207 states and 219 transitions. [2020-10-26 19:05:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-26 19:05:50,842 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 242 [2020-10-26 19:05:50,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:50,844 INFO L225 Difference]: With dead ends: 207 [2020-10-26 19:05:50,844 INFO L226 Difference]: Without dead ends: 136 [2020-10-26 19:05:50,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2020-10-26 19:05:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-26 19:05:50,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-10-26 19:05:50,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-26 19:05:50,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2020-10-26 19:05:50,854 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 242 [2020-10-26 19:05:50,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:50,854 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2020-10-26 19:05:50,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-26 19:05:50,854 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2020-10-26 19:05:50,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-26 19:05:50,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:50,855 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 27, 27, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:05:50,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:05:50,855 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:50,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:50,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1161962897, now seen corresponding path program 27 times [2020-10-26 19:05:50,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:50,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060735235] [2020-10-26 19:05:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:50,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:50,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:51,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:51,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:55,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:55,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-26 19:05:55,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:55,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-26 19:05:55,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:55,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:55,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:55,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:55,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:56,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:56,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:56,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:56,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:56,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:56,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:05:56,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:56,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:56,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:56,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:56,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:56,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:05:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:56,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:56,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:57,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:57,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:05:57,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:57,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 542 [2020-10-26 19:05:57,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:57,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:57,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:57,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:57,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:58,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-10-26 19:05:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:58,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:58,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:59,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:59,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:05:59,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:59,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-10-26 19:05:59,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:59,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:59,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:59,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:59,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:59,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-10-26 19:05:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:59,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:59,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:59,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:59,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:05:59,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:59,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 501 [2020-10-26 19:05:59,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:59,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:59,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:59,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:59,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7467 backedges. 2187 proven. 5103 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-10-26 19:05:59,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060735235] [2020-10-26 19:05:59,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:59,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-26 19:05:59,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358606377] [2020-10-26 19:05:59,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-26 19:05:59,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:59,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-26 19:05:59,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:05:59,683 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 59 states. [2020-10-26 19:06:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:02,504 INFO L93 Difference]: Finished difference Result 213 states and 225 transitions. [2020-10-26 19:06:02,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-26 19:06:02,504 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 250 [2020-10-26 19:06:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:02,506 INFO L225 Difference]: With dead ends: 213 [2020-10-26 19:06:02,506 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:06:02,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1739, Invalid=5743, Unknown=0, NotChecked=0, Total=7482 [2020-10-26 19:06:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:06:02,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-10-26 19:06:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:06:02,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2020-10-26 19:06:02,515 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 250 [2020-10-26 19:06:02,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:02,516 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2020-10-26 19:06:02,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-26 19:06:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2020-10-26 19:06:02,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-26 19:06:02,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:02,517 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 28, 28, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:02,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:06:02,518 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:02,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:02,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1006375855, now seen corresponding path program 28 times [2020-10-26 19:06:02,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:02,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927796964] [2020-10-26 19:06:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:02,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking...