/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-examples/sanfoundry_27_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:13:33,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:13:33,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:13:33,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:13:33,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:13:33,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:13:33,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:13:33,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:13:33,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:13:33,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:13:33,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:13:33,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:13:33,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:13:33,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:13:33,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:13:33,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:13:33,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:13:33,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:13:33,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:13:33,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:13:33,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:13:33,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:13:33,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:13:33,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:13:33,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:13:33,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:13:33,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:13:33,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:13:33,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:13:33,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:13:33,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:13:33,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:13:33,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:13:33,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:13:33,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:13:33,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:13:33,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:13:33,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:13:33,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:13:33,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:13:33,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:13:33,405 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 19:13:33,457 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:13:33,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:13:33,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:13:33,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:13:33,462 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:13:33,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:13:33,462 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:13:33,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:13:33,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:13:33,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:13:33,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:13:33,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:13:33,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:13:33,466 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:13:33,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:13:33,466 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:13:33,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:13:33,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:13:33,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:13:33,467 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:13:33,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:13:33,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:13:33,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:13:33,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:13:33,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:13:33,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:13:33,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:13:33,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:13:33,469 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:13:33,469 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:13:33,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:13:33,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:13:33,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:13:33,957 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:13:33,958 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:13:33,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2020-10-26 19:13:34,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5035d98f5/0ba27fcb1e6f4effad7707a713fdaf85/FLAGeb70c3ae7 [2020-10-26 19:13:34,758 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:13:34,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2020-10-26 19:13:34,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5035d98f5/0ba27fcb1e6f4effad7707a713fdaf85/FLAGeb70c3ae7 [2020-10-26 19:13:35,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5035d98f5/0ba27fcb1e6f4effad7707a713fdaf85 [2020-10-26 19:13:35,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:13:35,095 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:13:35,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:13:35,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:13:35,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:13:35,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:13:35" (1/1) ... [2020-10-26 19:13:35,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b3ed727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:35, skipping insertion in model container [2020-10-26 19:13:35,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:13:35" (1/1) ... [2020-10-26 19:13:35,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:13:35,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:13:35,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:13:35,386 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:13:35,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:13:35,423 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:13:35,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:35 WrapperNode [2020-10-26 19:13:35,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:13:35,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:13:35,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:13:35,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:13:35,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:35" (1/1) ... [2020-10-26 19:13:35,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:35" (1/1) ... [2020-10-26 19:13:35,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:35" (1/1) ... [2020-10-26 19:13:35,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:35" (1/1) ... [2020-10-26 19:13:35,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:35" (1/1) ... [2020-10-26 19:13:35,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:35" (1/1) ... [2020-10-26 19:13:35,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:35" (1/1) ... [2020-10-26 19:13:35,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:13:35,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:13:35,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:13:35,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:13:35,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:35" (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 19:13:35,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:13:35,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:13:35,543 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:13:35,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:13:35,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:13:35,544 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:13:35,544 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:13:35,544 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:13:35,544 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:13:35,544 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:13:35,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:13:35,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:13:35,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:13:35,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:13:35,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:13:35,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:13:35,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:13:35,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:13:35,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:13:35,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:13:35,861 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:13:35,862 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:13:35,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:13:35 BoogieIcfgContainer [2020-10-26 19:13:35,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:13:35,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:13:35,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:13:35,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:13:35,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:13:35" (1/3) ... [2020-10-26 19:13:35,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149a9d63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:13:35, skipping insertion in model container [2020-10-26 19:13:35,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:35" (2/3) ... [2020-10-26 19:13:35,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149a9d63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:13:35, skipping insertion in model container [2020-10-26 19:13:35,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:13:35" (3/3) ... [2020-10-26 19:13:35,880 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_27_ground.i [2020-10-26 19:13:35,900 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:13:35,908 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:13:35,979 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:13:36,063 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:13:36,064 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:13:36,064 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:13:36,064 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:13:36,064 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:13:36,065 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:13:36,066 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:13:36,066 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:13:36,105 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-26 19:13:36,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:13:36,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:36,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:36,113 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:36,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1523083384, now seen corresponding path program 1 times [2020-10-26 19:13:36,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:36,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145990986] [2020-10-26 19:13:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:36,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:36,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:36,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:37,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:37,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:13:37,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:13:37,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-26 19:13:37,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:37,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:13:37,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:37,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:13:37,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:37,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:37,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:37,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:37,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:37,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:13:37,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:37,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:37,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:37,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:37,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:13:37,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:37,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145990986] [2020-10-26 19:13:37,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:13:37,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:13:37,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017971456] [2020-10-26 19:13:37,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:13:37,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:37,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:13:37,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:13:37,162 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-26 19:13:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:37,270 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2020-10-26 19:13:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:13:37,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-26 19:13:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:37,281 INFO L225 Difference]: With dead ends: 55 [2020-10-26 19:13:37,282 INFO L226 Difference]: Without dead ends: 25 [2020-10-26 19:13:37,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 19:13:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-26 19:13:37,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-26 19:13:37,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 19:13:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-26 19:13:37,335 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-26 19:13:37,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:37,336 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-26 19:13:37,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:13:37,336 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-26 19:13:37,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:13:37,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:37,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:37,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:13:37,338 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:37,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:37,339 INFO L82 PathProgramCache]: Analyzing trace with hash 2122019559, now seen corresponding path program 1 times [2020-10-26 19:13:37,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:37,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913113187] [2020-10-26 19:13:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:37,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:37,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:37,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:37,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:37,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:13:37,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:13:37,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-26 19:13:37,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:13:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:13:37,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:13:37,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:37,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:37,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:37,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:37,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:37,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:37,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 19:13:37,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:37,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:37,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:37,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:37,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:13:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:37,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913113187] [2020-10-26 19:13:37,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:13:37,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:13:37,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547405808] [2020-10-26 19:13:37,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:13:37,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:37,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:13:37,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:13:37,927 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2020-10-26 19:13:38,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:38,103 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-26 19:13:38,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:13:38,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 19:13:38,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:38,105 INFO L225 Difference]: With dead ends: 44 [2020-10-26 19:13:38,106 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 19:13:38,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:13:38,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 19:13:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-26 19:13:38,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-26 19:13:38,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-26 19:13:38,137 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2020-10-26 19:13:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:38,138 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-26 19:13:38,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:13:38,138 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-26 19:13:38,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 19:13:38,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:38,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:38,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:13:38,142 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:38,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1132955141, now seen corresponding path program 1 times [2020-10-26 19:13:38,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:38,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414337174] [2020-10-26 19:13:38,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:38,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:38,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:38,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:38,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:38,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:13:38,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:13:38,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-26 19:13:38,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:38,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:13:38,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:38,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:13:38,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:38,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:38,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:38,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:38,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:38,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:38,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:13:38,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:38,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:38,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:38,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:38,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:13:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:38,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414337174] [2020-10-26 19:13:38,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:38,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:13:38,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140290778] [2020-10-26 19:13:38,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:13:38,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:38,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:13:38,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:13:38,943 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-10-26 19:13:39,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:39,074 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-10-26 19:13:39,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:13:39,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-26 19:13:39,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:39,076 INFO L225 Difference]: With dead ends: 49 [2020-10-26 19:13:39,076 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:13:39,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:13:39,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:13:39,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-26 19:13:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 19:13:39,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-26 19:13:39,086 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2020-10-26 19:13:39,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:39,087 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-26 19:13:39,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:13:39,089 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-26 19:13:39,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:13:39,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:39,091 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:39,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:13:39,094 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:39,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:39,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1103847596, now seen corresponding path program 1 times [2020-10-26 19:13:39,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:39,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472878209] [2020-10-26 19:13:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:39,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:39,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:39,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:40,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:40,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:13:40,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:13:40,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1241 [2020-10-26 19:13:40,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:40,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:13:40,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:40,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:13:40,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:40,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:40,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:40,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:40,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:40,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:40,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:13:40,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:40,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:40,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:40,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:40,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:13:40,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472878209] [2020-10-26 19:13:40,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:40,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:13:40,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106379111] [2020-10-26 19:13:40,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:13:40,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:40,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:13:40,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:13:40,454 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-10-26 19:13:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:40,618 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-10-26 19:13:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:13:40,618 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-26 19:13:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:40,619 INFO L225 Difference]: With dead ends: 55 [2020-10-26 19:13:40,620 INFO L226 Difference]: Without dead ends: 37 [2020-10-26 19:13:40,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:13:40,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-26 19:13:40,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-26 19:13:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:13:40,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-26 19:13:40,633 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 24 [2020-10-26 19:13:40,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:40,633 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-26 19:13:40,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:13:40,634 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-26 19:13:40,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:13:40,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:40,636 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:40,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:13:40,636 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:40,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:40,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1938733407, now seen corresponding path program 2 times [2020-10-26 19:13:40,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:40,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469203849] [2020-10-26 19:13:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:40,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:40,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:40,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:44,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:44,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:13:44,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:13:44,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3474 [2020-10-26 19:13:44,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:44,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:13:44,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:44,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:13:44,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:44,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:44,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:44,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:44,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:44,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:44,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:13:44,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:44,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:44,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:44,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:44,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:44,227 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:13:44,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469203849] [2020-10-26 19:13:44,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:44,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:13:44,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108279200] [2020-10-26 19:13:44,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:13:44,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:44,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:13:44,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:13:44,234 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 7 states. [2020-10-26 19:13:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:44,414 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-10-26 19:13:44,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:13:44,414 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-26 19:13:44,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:44,416 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:13:44,416 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:13:44,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:13:44,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:13:44,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-26 19:13:44,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:13:44,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-26 19:13:44,431 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2020-10-26 19:13:44,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:44,431 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-26 19:13:44,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:13:44,431 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-26 19:13:44,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:13:44,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:44,438 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:44,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:13:44,438 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:44,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:44,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1578821648, now seen corresponding path program 3 times [2020-10-26 19:13:44,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:44,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049343300] [2020-10-26 19:13:44,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:44,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:44,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:44,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:49,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:49,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:13:49,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:13:49,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:13:49,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:49,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:13:49,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:49,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:13:49,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:49,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:49,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:49,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:49,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:49,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:49,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:13:49,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:49,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:49,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:49,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:49,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:13:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:13:49,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049343300] [2020-10-26 19:13:49,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:49,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:13:49,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005078281] [2020-10-26 19:13:49,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:13:49,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:49,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:13:49,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:13:49,589 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 8 states. [2020-10-26 19:13:49,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:49,735 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-10-26 19:13:49,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:13:49,736 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-26 19:13:49,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:49,737 INFO L225 Difference]: With dead ends: 71 [2020-10-26 19:13:49,737 INFO L226 Difference]: Without dead ends: 47 [2020-10-26 19:13:49,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:13:49,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-26 19:13:49,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-10-26 19:13:49,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:13:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-26 19:13:49,751 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 34 [2020-10-26 19:13:49,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:49,752 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-26 19:13:49,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:13:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-26 19:13:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:13:49,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:49,754 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:49,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:13:49,755 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:49,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:49,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1617028925, now seen corresponding path program 4 times [2020-10-26 19:13:49,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:49,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975396701] [2020-10-26 19:13:49,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:49,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:49,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:49,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:54,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:54,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:13:54,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:13:54,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:13:54,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:54,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:13:54,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:54,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:13:54,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:13:54,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:54,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:54,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:54,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:54,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:54,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:13:54,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:54,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:54,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:54,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:54,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-26 19:13:54,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975396701] [2020-10-26 19:13:54,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:54,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:13:54,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139161702] [2020-10-26 19:13:54,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:13:54,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:54,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:13:54,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:13:54,919 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 9 states. [2020-10-26 19:13:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:55,092 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2020-10-26 19:13:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:13:55,093 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-26 19:13:55,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:55,094 INFO L225 Difference]: With dead ends: 79 [2020-10-26 19:13:55,094 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:13:55,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:13:55,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:13:55,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-10-26 19:13:55,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:13:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-26 19:13:55,110 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 39 [2020-10-26 19:13:55,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:55,112 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-26 19:13:55,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:13:55,112 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-26 19:13:55,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 19:13:55,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:55,114 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:55,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:13:55,115 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:55,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:55,118 INFO L82 PathProgramCache]: Analyzing trace with hash -499077260, now seen corresponding path program 5 times [2020-10-26 19:13:55,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:55,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640895639] [2020-10-26 19:13:55,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:55,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:55,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:55,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:00,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:00,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:14:00,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:00,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:14:00,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:00,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:14:00,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:00,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:14:00,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:00,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:00,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:00,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:00,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:00,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:00,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:00,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:00,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:00,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:00,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:00,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:14:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:14:00,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640895639] [2020-10-26 19:14:00,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:00,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:14:00,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895301146] [2020-10-26 19:14:00,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:14:00,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:00,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:14:00,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:14:00,261 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 10 states. [2020-10-26 19:14:00,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:00,435 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2020-10-26 19:14:00,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:14:00,436 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-26 19:14:00,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:00,437 INFO L225 Difference]: With dead ends: 87 [2020-10-26 19:14:00,437 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:14:00,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:14:00,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:14:00,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-26 19:14:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:14:00,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-10-26 19:14:00,455 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 44 [2020-10-26 19:14:00,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:00,455 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-10-26 19:14:00,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:14:00,455 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-10-26 19:14:00,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:14:00,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:00,458 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:00,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:14:00,459 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:00,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:00,460 INFO L82 PathProgramCache]: Analyzing trace with hash 264185817, now seen corresponding path program 6 times [2020-10-26 19:14:00,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:00,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626216183] [2020-10-26 19:14:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:00,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:00,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:00,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:05,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:05,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:14:05,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:05,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:14:05,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:05,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:14:05,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:05,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:14:05,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:05,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:05,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:05,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:05,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:05,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:05,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:05,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:05,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:05,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:05,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:05,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:14:05,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626216183] [2020-10-26 19:14:05,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:05,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:14:05,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822788912] [2020-10-26 19:14:05,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:14:05,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:05,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:14:05,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:14:05,634 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 11 states. [2020-10-26 19:14:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:05,776 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2020-10-26 19:14:05,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:14:05,777 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-10-26 19:14:05,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:05,778 INFO L225 Difference]: With dead ends: 95 [2020-10-26 19:14:05,778 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:14:05,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:14:05,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:14:05,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-10-26 19:14:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:14:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-26 19:14:05,786 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 49 [2020-10-26 19:14:05,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:05,787 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-26 19:14:05,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:14:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-26 19:14:05,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:14:05,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:05,788 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:05,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:14:05,788 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:05,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:05,789 INFO L82 PathProgramCache]: Analyzing trace with hash 773256920, now seen corresponding path program 7 times [2020-10-26 19:14:05,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:05,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385094580] [2020-10-26 19:14:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:05,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:05,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:10,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:10,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:14:10,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:10,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:14:10,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:10,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:14:10,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:10,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:14:10,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:10,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:10,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:10,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:10,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:10,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:10,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:10,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:10,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:10,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:10,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:10,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-26 19:14:10,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385094580] [2020-10-26 19:14:10,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:10,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:14:10,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802318418] [2020-10-26 19:14:10,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:14:10,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:10,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:14:10,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:14:10,939 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 12 states. [2020-10-26 19:14:11,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:11,135 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2020-10-26 19:14:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:14:11,136 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-26 19:14:11,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:11,137 INFO L225 Difference]: With dead ends: 103 [2020-10-26 19:14:11,137 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:14:11,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:14:11,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:14:11,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-10-26 19:14:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:14:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-26 19:14:11,146 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 54 [2020-10-26 19:14:11,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:11,146 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-26 19:14:11,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:14:11,146 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-26 19:14:11,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:14:11,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:11,147 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:11,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:14:11,148 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:11,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:11,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1366214773, now seen corresponding path program 8 times [2020-10-26 19:14:11,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:11,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67254957] [2020-10-26 19:14:11,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:11,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:11,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:16,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:16,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:14:16,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:16,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:14:16,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:16,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:14:16,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:16,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:14:16,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:16,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:16,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:16,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:16,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:16,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:16,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:16,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:16,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:16,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:16,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:16,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:14:16,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67254957] [2020-10-26 19:14:16,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:16,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:14:16,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289681987] [2020-10-26 19:14:16,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:14:16,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:16,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:14:16,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:14:16,320 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 13 states. [2020-10-26 19:14:16,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:16,507 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2020-10-26 19:14:16,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:14:16,508 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-26 19:14:16,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:16,509 INFO L225 Difference]: With dead ends: 111 [2020-10-26 19:14:16,509 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:14:16,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:14:16,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:14:16,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-10-26 19:14:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:14:16,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2020-10-26 19:14:16,536 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 59 [2020-10-26 19:14:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:16,537 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2020-10-26 19:14:16,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:14:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2020-10-26 19:14:16,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:14:16,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:16,539 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:16,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:14:16,539 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:16,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:16,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1393033668, now seen corresponding path program 9 times [2020-10-26 19:14:16,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:16,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654201781] [2020-10-26 19:14:16,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:16,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:16,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:18,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:21,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:21,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:14:21,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:21,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:14:21,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:21,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:14:21,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:21,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:14:21,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:21,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:21,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:21,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:21,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:21,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:21,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:21,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:21,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:21,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:21,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:21,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-26 19:14:21,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654201781] [2020-10-26 19:14:21,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:21,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:14:21,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040588041] [2020-10-26 19:14:21,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:14:21,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:21,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:14:21,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:14:21,719 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand 14 states. [2020-10-26 19:14:21,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:21,912 INFO L93 Difference]: Finished difference Result 119 states and 144 transitions. [2020-10-26 19:14:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:14:21,913 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 64 [2020-10-26 19:14:21,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:21,914 INFO L225 Difference]: With dead ends: 119 [2020-10-26 19:14:21,914 INFO L226 Difference]: Without dead ends: 77 [2020-10-26 19:14:21,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:14:21,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-26 19:14:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-10-26 19:14:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:14:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2020-10-26 19:14:21,923 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 64 [2020-10-26 19:14:21,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:21,925 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2020-10-26 19:14:21,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:14:21,928 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2020-10-26 19:14:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:14:21,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:21,929 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:21,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:14:21,930 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:21,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1591118097, now seen corresponding path program 10 times [2020-10-26 19:14:21,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:21,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815055062] [2020-10-26 19:14:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:21,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:21,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:24,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:26,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:26,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:14:26,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:26,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:14:26,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:26,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:14:26,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:26,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:14:26,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:27,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:27,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:27,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:27,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:27,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:27,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:27,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:27,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:27,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:27,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:27,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-26 19:14:27,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815055062] [2020-10-26 19:14:27,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:27,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:14:27,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383843824] [2020-10-26 19:14:27,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:14:27,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:27,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:14:27,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:14:27,134 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand 15 states. [2020-10-26 19:14:27,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:27,310 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2020-10-26 19:14:27,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:14:27,311 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2020-10-26 19:14:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:27,312 INFO L225 Difference]: With dead ends: 127 [2020-10-26 19:14:27,312 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:14:27,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:14:27,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:14:27,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-10-26 19:14:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 19:14:27,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2020-10-26 19:14:27,325 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 69 [2020-10-26 19:14:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:27,326 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2020-10-26 19:14:27,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:14:27,326 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2020-10-26 19:14:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:14:27,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:27,332 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:27,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:14:27,333 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:27,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1178729056, now seen corresponding path program 11 times [2020-10-26 19:14:27,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:27,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446482272] [2020-10-26 19:14:27,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:27,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:27,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:30,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:32,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:32,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:14:32,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:32,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:14:32,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:32,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:14:32,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:32,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:14:32,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:32,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:32,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:32,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:32,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:32,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:32,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:32,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:32,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:32,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:32,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:32,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-26 19:14:32,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446482272] [2020-10-26 19:14:32,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:32,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:14:32,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206848489] [2020-10-26 19:14:32,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:14:32,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:32,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:14:32,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:14:32,551 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 16 states. [2020-10-26 19:14:32,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:32,764 INFO L93 Difference]: Finished difference Result 135 states and 164 transitions. [2020-10-26 19:14:32,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:14:32,765 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2020-10-26 19:14:32,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:32,766 INFO L225 Difference]: With dead ends: 135 [2020-10-26 19:14:32,766 INFO L226 Difference]: Without dead ends: 87 [2020-10-26 19:14:32,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:14:32,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-26 19:14:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2020-10-26 19:14:32,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:14:32,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2020-10-26 19:14:32,777 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 74 [2020-10-26 19:14:32,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:32,778 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2020-10-26 19:14:32,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:14:32,778 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2020-10-26 19:14:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:14:32,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:32,786 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:32,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:14:32,786 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:32,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:32,787 INFO L82 PathProgramCache]: Analyzing trace with hash 266086829, now seen corresponding path program 12 times [2020-10-26 19:14:32,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:32,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161119713] [2020-10-26 19:14:32,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:32,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:32,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:37,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:37,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:37,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:14:37,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:14:37,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:14:37,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:37,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:14:37,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:37,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:14:37,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:37,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:37,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:37,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:37,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:37,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:37,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:37,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:37,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:37,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:37,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:37,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-26 19:14:38,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161119713] [2020-10-26 19:14:38,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:38,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:14:38,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669211574] [2020-10-26 19:14:38,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:14:38,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:38,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:14:38,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:14:38,003 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand 17 states. [2020-10-26 19:14:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:38,217 INFO L93 Difference]: Finished difference Result 143 states and 174 transitions. [2020-10-26 19:14:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:14:38,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-10-26 19:14:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:38,218 INFO L225 Difference]: With dead ends: 143 [2020-10-26 19:14:38,218 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:14:38,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:14:38,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:14:38,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2020-10-26 19:14:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:14:38,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2020-10-26 19:14:38,232 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 79 [2020-10-26 19:14:38,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:38,233 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2020-10-26 19:14:38,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:14:38,233 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2020-10-26 19:14:38,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 19:14:38,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:38,234 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:38,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:14:38,235 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:38,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:38,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2101129980, now seen corresponding path program 13 times [2020-10-26 19:14:38,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:38,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664778403] [2020-10-26 19:14:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:38,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:38,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:43,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:43,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:14:43,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:43,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:14:43,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:43,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:14:43,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:43,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:14:43,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:43,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:43,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:43,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:43,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:43,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:43,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:43,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:43,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:43,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:43,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:43,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-26 19:14:43,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664778403] [2020-10-26 19:14:43,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:43,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:14:43,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510560064] [2020-10-26 19:14:43,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:14:43,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:43,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:14:43,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:14:43,497 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand 18 states. [2020-10-26 19:14:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:43,727 INFO L93 Difference]: Finished difference Result 151 states and 184 transitions. [2020-10-26 19:14:43,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:14:43,727 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2020-10-26 19:14:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:43,728 INFO L225 Difference]: With dead ends: 151 [2020-10-26 19:14:43,728 INFO L226 Difference]: Without dead ends: 97 [2020-10-26 19:14:43,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:14:43,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-26 19:14:43,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-10-26 19:14:43,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:14:43,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2020-10-26 19:14:43,738 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 84 [2020-10-26 19:14:43,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:43,738 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2020-10-26 19:14:43,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:14:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2020-10-26 19:14:43,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 19:14:43,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:43,740 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:43,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:14:43,740 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:43,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:43,741 INFO L82 PathProgramCache]: Analyzing trace with hash -152737207, now seen corresponding path program 14 times [2020-10-26 19:14:43,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:43,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737742952] [2020-10-26 19:14:43,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:43,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:43,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:48,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:48,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:14:48,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:48,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:14:48,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:48,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:14:48,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:48,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:14:48,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:49,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:49,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:49,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:49,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:49,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:49,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:49,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:49,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:49,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:49,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:49,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-26 19:14:49,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737742952] [2020-10-26 19:14:49,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:49,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:14:49,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217116855] [2020-10-26 19:14:49,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:14:49,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:49,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:14:49,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:14:49,038 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand 19 states. [2020-10-26 19:14:49,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:49,291 INFO L93 Difference]: Finished difference Result 159 states and 194 transitions. [2020-10-26 19:14:49,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:14:49,292 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 89 [2020-10-26 19:14:49,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:49,293 INFO L225 Difference]: With dead ends: 159 [2020-10-26 19:14:49,293 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:14:49,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:14:49,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:14:49,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-10-26 19:14:49,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:14:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2020-10-26 19:14:49,302 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 89 [2020-10-26 19:14:49,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:49,302 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2020-10-26 19:14:49,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:14:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2020-10-26 19:14:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-26 19:14:49,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:49,303 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:49,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:14:49,303 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:49,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:49,304 INFO L82 PathProgramCache]: Analyzing trace with hash -303950744, now seen corresponding path program 15 times [2020-10-26 19:14:49,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:49,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800360063] [2020-10-26 19:14:49,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:49,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:49,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:54,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:54,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:14:54,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:54,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:14:54,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:54,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:14:54,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:54,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:14:54,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:54,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:54,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:54,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:54,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:54,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:54,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:54,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:54,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:54,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:54,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:54,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-26 19:14:54,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800360063] [2020-10-26 19:14:54,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:54,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:14:54,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699232391] [2020-10-26 19:14:54,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:14:54,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:54,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:14:54,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:14:54,615 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand 20 states. [2020-10-26 19:14:54,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:54,875 INFO L93 Difference]: Finished difference Result 167 states and 204 transitions. [2020-10-26 19:14:54,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:14:54,875 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-10-26 19:14:54,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:54,877 INFO L225 Difference]: With dead ends: 167 [2020-10-26 19:14:54,877 INFO L226 Difference]: Without dead ends: 107 [2020-10-26 19:14:54,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:14:54,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-26 19:14:54,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2020-10-26 19:14:54,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-26 19:14:54,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2020-10-26 19:14:54,884 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 94 [2020-10-26 19:14:54,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:54,884 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2020-10-26 19:14:54,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:14:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2020-10-26 19:14:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:14:54,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:54,885 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:54,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:14:54,885 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:54,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2094533349, now seen corresponding path program 16 times [2020-10-26 19:14:54,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:54,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050377314] [2020-10-26 19:14:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:54,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:54,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:59,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:59,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:14:59,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:14:59,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:14:59,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:59,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:14:59,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:59,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:14:59,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:00,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:00,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:00,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:00,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:00,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:00,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:00,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:00,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:00,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:00,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:00,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-26 19:15:00,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050377314] [2020-10-26 19:15:00,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:00,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:15:00,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951834830] [2020-10-26 19:15:00,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:15:00,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:00,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:15:00,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:15:00,192 INFO L87 Difference]: Start difference. First operand 104 states and 122 transitions. Second operand 21 states. [2020-10-26 19:15:00,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:00,427 INFO L93 Difference]: Finished difference Result 175 states and 214 transitions. [2020-10-26 19:15:00,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:15:00,427 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 99 [2020-10-26 19:15:00,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:00,428 INFO L225 Difference]: With dead ends: 175 [2020-10-26 19:15:00,428 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:15:00,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:15:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:15:00,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2020-10-26 19:15:00,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-26 19:15:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2020-10-26 19:15:00,435 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 99 [2020-10-26 19:15:00,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:00,436 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2020-10-26 19:15:00,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:15:00,436 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2020-10-26 19:15:00,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-26 19:15:00,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:00,437 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:00,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:15:00,437 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:00,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:00,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2088016844, now seen corresponding path program 17 times [2020-10-26 19:15:00,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:00,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025687451] [2020-10-26 19:15:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:00,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:00,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:05,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:05,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:15:05,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:05,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:15:05,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:05,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:15:05,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:05,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:15:05,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:05,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:05,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:05,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:05,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:05,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:05,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:05,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:05,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:05,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:05,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:05,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-26 19:15:05,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025687451] [2020-10-26 19:15:05,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:05,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:15:05,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293069486] [2020-10-26 19:15:05,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:15:05,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:05,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:15:05,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:15:05,780 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand 22 states. [2020-10-26 19:15:06,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:06,087 INFO L93 Difference]: Finished difference Result 183 states and 224 transitions. [2020-10-26 19:15:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:15:06,087 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 104 [2020-10-26 19:15:06,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:06,089 INFO L225 Difference]: With dead ends: 183 [2020-10-26 19:15:06,089 INFO L226 Difference]: Without dead ends: 117 [2020-10-26 19:15:06,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:15:06,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-26 19:15:06,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2020-10-26 19:15:06,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:15:06,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 134 transitions. [2020-10-26 19:15:06,096 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 134 transitions. Word has length 104 [2020-10-26 19:15:06,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:06,097 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 134 transitions. [2020-10-26 19:15:06,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:15:06,097 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 134 transitions. [2020-10-26 19:15:06,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:15:06,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:06,098 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:06,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:15:06,098 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:06,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:06,099 INFO L82 PathProgramCache]: Analyzing trace with hash -48641151, now seen corresponding path program 18 times [2020-10-26 19:15:06,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:06,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027567787] [2020-10-26 19:15:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:06,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:06,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:11,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:11,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:15:11,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:11,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 19:15:11,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:15:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:15:11,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:11,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:11,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:11,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:11,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:11,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:11,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:11,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:11,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:11,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:11,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:11,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-26 19:15:11,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027567787] [2020-10-26 19:15:11,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:11,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:15:11,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357243453] [2020-10-26 19:15:11,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:15:11,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:11,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:15:11,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:15:11,488 INFO L87 Difference]: Start difference. First operand 114 states and 134 transitions. Second operand 23 states. [2020-10-26 19:15:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:11,753 INFO L93 Difference]: Finished difference Result 191 states and 234 transitions. [2020-10-26 19:15:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:15:11,753 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-10-26 19:15:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:11,754 INFO L225 Difference]: With dead ends: 191 [2020-10-26 19:15:11,754 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:15:11,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:15:11,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:15:11,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2020-10-26 19:15:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-26 19:15:11,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2020-10-26 19:15:11,762 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 109 [2020-10-26 19:15:11,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:11,763 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2020-10-26 19:15:11,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:15:11,763 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2020-10-26 19:15:11,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-26 19:15:11,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:11,764 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:11,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:15:11,765 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:11,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:11,765 INFO L82 PathProgramCache]: Analyzing trace with hash 794108720, now seen corresponding path program 19 times [2020-10-26 19:15:11,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:11,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712703921] [2020-10-26 19:15:11,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:11,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:11,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:16,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:16,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-26 19:15:16,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:16,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:15:16,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:16,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:15:16,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:16,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:15:16,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:17,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:17,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:17,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:17,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:17,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:17,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:17,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:17,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:17,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:17,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:17,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-26 19:15:17,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712703921] [2020-10-26 19:15:17,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:17,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:15:17,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446045162] [2020-10-26 19:15:17,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:15:17,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:17,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:15:17,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:15:17,170 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand 24 states. [2020-10-26 19:15:17,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:17,499 INFO L93 Difference]: Finished difference Result 199 states and 244 transitions. [2020-10-26 19:15:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:15:17,503 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 114 [2020-10-26 19:15:17,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:17,504 INFO L225 Difference]: With dead ends: 199 [2020-10-26 19:15:17,504 INFO L226 Difference]: Without dead ends: 127 [2020-10-26 19:15:17,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:15:17,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-26 19:15:17,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2020-10-26 19:15:17,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-26 19:15:17,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2020-10-26 19:15:17,513 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 114 [2020-10-26 19:15:17,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:17,513 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2020-10-26 19:15:17,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:15:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2020-10-26 19:15:17,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-26 19:15:17,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:17,514 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:17,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:15:17,515 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:17,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:17,515 INFO L82 PathProgramCache]: Analyzing trace with hash -510628835, now seen corresponding path program 20 times [2020-10-26 19:15:17,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:17,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429378892] [2020-10-26 19:15:17,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:17,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:17,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:22,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:22,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 19:15:22,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:22,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:15:22,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:22,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:15:22,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:22,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:15:22,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:22,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:22,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:22,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:22,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:22,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:22,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:22,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:22,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:22,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-26 19:15:22,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429378892] [2020-10-26 19:15:22,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:22,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:15:22,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762686600] [2020-10-26 19:15:22,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:15:22,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:22,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:15:22,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:15:22,926 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand 25 states. [2020-10-26 19:15:23,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:23,256 INFO L93 Difference]: Finished difference Result 207 states and 254 transitions. [2020-10-26 19:15:23,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:15:23,257 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 119 [2020-10-26 19:15:23,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:23,258 INFO L225 Difference]: With dead ends: 207 [2020-10-26 19:15:23,258 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:15:23,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:15:23,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:15:23,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2020-10-26 19:15:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-26 19:15:23,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 152 transitions. [2020-10-26 19:15:23,264 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 152 transitions. Word has length 119 [2020-10-26 19:15:23,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:23,265 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 152 transitions. [2020-10-26 19:15:23,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:15:23,265 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 152 transitions. [2020-10-26 19:15:23,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-26 19:15:23,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:23,266 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:23,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:15:23,267 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:23,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:23,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1792928404, now seen corresponding path program 21 times [2020-10-26 19:15:23,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:23,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388815606] [2020-10-26 19:15:23,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:23,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:24,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:25,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:28,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:28,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-26 19:15:28,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:15:28,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-26 19:15:28,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:28,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:15:28,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:28,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:15:28,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:28,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:28,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:28,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:28,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:28,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:28,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:15:28,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:28,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:28,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:28,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:28,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-26 19:15:28,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388815606] [2020-10-26 19:15:28,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:28,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:15:28,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144422993] [2020-10-26 19:15:28,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:15:28,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:28,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:15:28,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:15:28,726 INFO L87 Difference]: Start difference. First operand 129 states and 152 transitions. Second operand 26 states. [2020-10-26 19:15:29,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:29,006 INFO L93 Difference]: Finished difference Result 215 states and 264 transitions. [2020-10-26 19:15:29,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:15:29,006 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 124 [2020-10-26 19:15:29,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:29,008 INFO L225 Difference]: With dead ends: 215 [2020-10-26 19:15:29,008 INFO L226 Difference]: Without dead ends: 137 [2020-10-26 19:15:29,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:15:29,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-26 19:15:29,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2020-10-26 19:15:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-26 19:15:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2020-10-26 19:15:29,020 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 124 [2020-10-26 19:15:29,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:29,021 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2020-10-26 19:15:29,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:15:29,021 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2020-10-26 19:15:29,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-26 19:15:29,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:29,023 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:29,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:15:29,026 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:29,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:29,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1096700743, now seen corresponding path program 22 times [2020-10-26 19:15:29,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:29,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167452635] [2020-10-26 19:15:29,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:29,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:30,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:31,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:34,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:34,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-26 19:15:34,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:15:34,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:15:34,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:34,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:15:34,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:34,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:15:34,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:34,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:34,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:34,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:34,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:34,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:34,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:15:34,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:34,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:34,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:34,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:34,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-26 19:15:34,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167452635] [2020-10-26 19:15:34,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:34,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:15:34,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841460085] [2020-10-26 19:15:34,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:15:34,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:34,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:15:34,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:15:34,527 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand 27 states. [2020-10-26 19:15:34,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:34,925 INFO L93 Difference]: Finished difference Result 223 states and 274 transitions. [2020-10-26 19:15:34,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:15:34,926 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 129 [2020-10-26 19:15:34,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:34,927 INFO L225 Difference]: With dead ends: 223 [2020-10-26 19:15:34,927 INFO L226 Difference]: Without dead ends: 142 [2020-10-26 19:15:34,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:15:34,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-26 19:15:34,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2020-10-26 19:15:34,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-26 19:15:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 164 transitions. [2020-10-26 19:15:34,934 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 164 transitions. Word has length 129 [2020-10-26 19:15:34,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:34,935 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 164 transitions. [2020-10-26 19:15:34,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:15:34,935 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 164 transitions. [2020-10-26 19:15:34,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-26 19:15:34,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:34,942 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:34,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:15:34,943 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:34,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:34,943 INFO L82 PathProgramCache]: Analyzing trace with hash -622251528, now seen corresponding path program 23 times [2020-10-26 19:15:34,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:34,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724373899] [2020-10-26 19:15:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:34,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:35,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:40,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:40,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 19:15:40,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:40,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-26 19:15:40,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:40,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:15:40,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:40,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:15:40,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:40,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:40,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:40,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:40,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:40,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:40,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:15:40,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:40,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:40,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:40,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:40,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-10-26 19:15:40,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724373899] [2020-10-26 19:15:40,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:40,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:15:40,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894929055] [2020-10-26 19:15:40,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:15:40,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:40,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:15:40,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:15:40,513 INFO L87 Difference]: Start difference. First operand 139 states and 164 transitions. Second operand 28 states. [2020-10-26 19:15:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:40,784 INFO L93 Difference]: Finished difference Result 231 states and 284 transitions. [2020-10-26 19:15:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:15:40,784 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 134 [2020-10-26 19:15:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:40,786 INFO L225 Difference]: With dead ends: 231 [2020-10-26 19:15:40,786 INFO L226 Difference]: Without dead ends: 147 [2020-10-26 19:15:40,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:15:40,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-26 19:15:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2020-10-26 19:15:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-26 19:15:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2020-10-26 19:15:40,795 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 134 [2020-10-26 19:15:40,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:40,796 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2020-10-26 19:15:40,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:15:40,796 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2020-10-26 19:15:40,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-26 19:15:40,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:40,797 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:40,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:15:40,797 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:40,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:40,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1865633109, now seen corresponding path program 24 times [2020-10-26 19:15:40,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:40,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27324619] [2020-10-26 19:15:40,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:40,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:40,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:45,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:45,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 19:15:45,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:15:45,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 19:15:45,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:45,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:15:45,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:45,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:15:45,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:46,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:46,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:46,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:46,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:46,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:46,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:46,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:46,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:46,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:46,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:46,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-26 19:15:46,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27324619] [2020-10-26 19:15:46,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:46,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:15:46,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355062601] [2020-10-26 19:15:46,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:15:46,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:46,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:15:46,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:15:46,383 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand 29 states. [2020-10-26 19:15:46,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:46,793 INFO L93 Difference]: Finished difference Result 239 states and 294 transitions. [2020-10-26 19:15:46,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:15:46,794 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 139 [2020-10-26 19:15:46,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:46,795 INFO L225 Difference]: With dead ends: 239 [2020-10-26 19:15:46,796 INFO L226 Difference]: Without dead ends: 152 [2020-10-26 19:15:46,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:15:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-26 19:15:46,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2020-10-26 19:15:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-26 19:15:46,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 176 transitions. [2020-10-26 19:15:46,804 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 176 transitions. Word has length 139 [2020-10-26 19:15:46,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:46,805 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 176 transitions. [2020-10-26 19:15:46,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:15:46,805 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 176 transitions. [2020-10-26 19:15:46,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-26 19:15:46,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:46,806 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:46,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:15:46,806 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:46,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:46,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1456552284, now seen corresponding path program 25 times [2020-10-26 19:15:46,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:46,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368320021] [2020-10-26 19:15:46,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:46,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:48,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:50,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:51,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:51,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-26 19:15:51,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:15:51,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-26 19:15:51,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:51,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:15:51,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:51,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:15:51,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:52,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:52,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:52,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:52,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:52,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:52,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:52,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:52,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:52,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:52,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:52,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-10-26 19:15:52,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368320021] [2020-10-26 19:15:52,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:52,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:15:52,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056745381] [2020-10-26 19:15:52,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:15:52,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:52,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:15:52,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:15:52,450 INFO L87 Difference]: Start difference. First operand 149 states and 176 transitions. Second operand 30 states. [2020-10-26 19:15:52,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:52,827 INFO L93 Difference]: Finished difference Result 247 states and 304 transitions. [2020-10-26 19:15:52,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:15:52,827 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 144 [2020-10-26 19:15:52,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:52,829 INFO L225 Difference]: With dead ends: 247 [2020-10-26 19:15:52,829 INFO L226 Difference]: Without dead ends: 157 [2020-10-26 19:15:52,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:15:52,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-26 19:15:52,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2020-10-26 19:15:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-26 19:15:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 182 transitions. [2020-10-26 19:15:52,837 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 182 transitions. Word has length 144 [2020-10-26 19:15:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:52,837 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 182 transitions. [2020-10-26 19:15:52,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:15:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 182 transitions. [2020-10-26 19:15:52,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-26 19:15:52,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:52,844 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:52,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:15:52,845 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:52,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:52,845 INFO L82 PathProgramCache]: Analyzing trace with hash 816516593, now seen corresponding path program 26 times [2020-10-26 19:15:52,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:52,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030755965] [2020-10-26 19:15:52,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:52,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:54,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:56,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:57,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:57,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-26 19:15:57,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:15:57,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-26 19:15:57,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:57,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:15:57,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:57,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:15:57,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:58,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:58,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:58,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:58,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:58,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:58,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:58,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:58,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:58,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:58,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:58,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1730 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-10-26 19:15:58,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030755965] [2020-10-26 19:15:58,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:58,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:15:58,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304667906] [2020-10-26 19:15:58,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:15:58,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:58,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:15:58,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:15:58,516 INFO L87 Difference]: Start difference. First operand 154 states and 182 transitions. Second operand 31 states. [2020-10-26 19:15:58,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:58,967 INFO L93 Difference]: Finished difference Result 255 states and 314 transitions. [2020-10-26 19:15:58,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:15:58,968 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 149 [2020-10-26 19:15:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:58,969 INFO L225 Difference]: With dead ends: 255 [2020-10-26 19:15:58,970 INFO L226 Difference]: Without dead ends: 162 [2020-10-26 19:15:58,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:15:58,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-26 19:15:58,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2020-10-26 19:15:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-26 19:15:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 188 transitions. [2020-10-26 19:15:58,978 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 188 transitions. Word has length 149 [2020-10-26 19:15:58,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:58,978 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 188 transitions. [2020-10-26 19:15:58,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:15:58,978 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 188 transitions. [2020-10-26 19:15:58,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-26 19:15:58,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:58,979 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:58,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:15:58,980 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:58,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:58,980 INFO L82 PathProgramCache]: Analyzing trace with hash -982499136, now seen corresponding path program 27 times [2020-10-26 19:15:58,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:58,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766839704] [2020-10-26 19:15:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:59,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:01,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:04,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:04,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-26 19:16:04,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:04,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-26 19:16:04,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:04,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:16:04,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:04,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:16:04,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:04,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:04,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:04,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:04,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:04,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:04,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:04,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:04,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:04,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:04,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:04,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-26 19:16:04,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766839704] [2020-10-26 19:16:04,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:04,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:16:04,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428340958] [2020-10-26 19:16:04,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:16:04,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:04,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:16:04,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:16:04,625 INFO L87 Difference]: Start difference. First operand 159 states and 188 transitions. Second operand 32 states. [2020-10-26 19:16:05,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:05,101 INFO L93 Difference]: Finished difference Result 263 states and 324 transitions. [2020-10-26 19:16:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:16:05,102 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 154 [2020-10-26 19:16:05,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:05,104 INFO L225 Difference]: With dead ends: 263 [2020-10-26 19:16:05,104 INFO L226 Difference]: Without dead ends: 167 [2020-10-26 19:16:05,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:16:05,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-26 19:16:05,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2020-10-26 19:16:05,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-26 19:16:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 194 transitions. [2020-10-26 19:16:05,113 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 194 transitions. Word has length 154 [2020-10-26 19:16:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:05,113 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 194 transitions. [2020-10-26 19:16:05,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:16:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 194 transitions. [2020-10-26 19:16:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-26 19:16:05,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:05,114 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:05,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:16:05,115 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:05,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:05,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1091654003, now seen corresponding path program 28 times [2020-10-26 19:16:05,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:05,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623320748] [2020-10-26 19:16:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:05,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:07,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:10,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:10,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-26 19:16:10,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:10,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:16:10,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:10,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:16:10,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:10,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:16:10,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:10,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:10,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:10,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:10,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:10,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:10,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:10,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:10,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:10,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:10,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:10,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-10-26 19:16:10,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623320748] [2020-10-26 19:16:10,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:10,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:16:10,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196114881] [2020-10-26 19:16:10,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:16:10,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:10,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:16:10,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:16:10,782 INFO L87 Difference]: Start difference. First operand 164 states and 194 transitions. Second operand 33 states. [2020-10-26 19:16:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:11,268 INFO L93 Difference]: Finished difference Result 271 states and 334 transitions. [2020-10-26 19:16:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:16:11,269 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 159 [2020-10-26 19:16:11,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:11,270 INFO L225 Difference]: With dead ends: 271 [2020-10-26 19:16:11,270 INFO L226 Difference]: Without dead ends: 172 [2020-10-26 19:16:11,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:16:11,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-26 19:16:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2020-10-26 19:16:11,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-26 19:16:11,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2020-10-26 19:16:11,279 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 159 [2020-10-26 19:16:11,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:11,279 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2020-10-26 19:16:11,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:16:11,279 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2020-10-26 19:16:11,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-26 19:16:11,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:11,280 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:11,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:16:11,281 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:11,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:11,281 INFO L82 PathProgramCache]: Analyzing trace with hash 18909220, now seen corresponding path program 29 times [2020-10-26 19:16:11,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:11,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604343385] [2020-10-26 19:16:11,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:11,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:14,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:16,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:16,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-26 19:16:16,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:16,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5134 [2020-10-26 19:16:16,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:16,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:16:16,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:16,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:16:16,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:17,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:17,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:17,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:17,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:17,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:17,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:16:17,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:17,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:17,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:17,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:17,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-26 19:16:17,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604343385] [2020-10-26 19:16:17,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:17,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:16:17,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115009378] [2020-10-26 19:16:17,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:16:17,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:17,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:16:17,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:16:17,093 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand 34 states. [2020-10-26 19:16:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:17,605 INFO L93 Difference]: Finished difference Result 279 states and 344 transitions. [2020-10-26 19:16:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:16:17,606 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 164 [2020-10-26 19:16:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:17,608 INFO L225 Difference]: With dead ends: 279 [2020-10-26 19:16:17,608 INFO L226 Difference]: Without dead ends: 177 [2020-10-26 19:16:17,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:16:17,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-26 19:16:17,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2020-10-26 19:16:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-26 19:16:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 206 transitions. [2020-10-26 19:16:17,624 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 206 transitions. Word has length 164 [2020-10-26 19:16:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:17,625 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 206 transitions. [2020-10-26 19:16:17,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:16:17,625 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 206 transitions. [2020-10-26 19:16:17,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-26 19:16:17,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:17,627 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:17,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:16:17,627 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:17,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:17,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1885597481, now seen corresponding path program 30 times [2020-10-26 19:16:17,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:17,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89100673] [2020-10-26 19:16:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:17,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:21,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:22,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:22,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-26 19:16:22,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:22,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-26 19:16:22,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:22,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:16:22,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:22,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:16:22,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:23,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:23,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:23,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:23,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:23,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:23,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:23,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:23,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:23,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:23,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:23,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-10-26 19:16:23,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89100673] [2020-10-26 19:16:23,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:23,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:16:23,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967675406] [2020-10-26 19:16:23,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:16:23,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:23,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:16:23,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:16:23,413 INFO L87 Difference]: Start difference. First operand 174 states and 206 transitions. Second operand 35 states. [2020-10-26 19:16:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:23,813 INFO L93 Difference]: Finished difference Result 287 states and 354 transitions. [2020-10-26 19:16:23,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:16:23,814 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 169 [2020-10-26 19:16:23,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:23,818 INFO L225 Difference]: With dead ends: 287 [2020-10-26 19:16:23,818 INFO L226 Difference]: Without dead ends: 182 [2020-10-26 19:16:23,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:16:23,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-26 19:16:23,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2020-10-26 19:16:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-26 19:16:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 212 transitions. [2020-10-26 19:16:23,831 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 212 transitions. Word has length 169 [2020-10-26 19:16:23,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:23,832 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 212 transitions. [2020-10-26 19:16:23,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:16:23,832 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 212 transitions. [2020-10-26 19:16:23,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-26 19:16:23,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:23,834 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:23,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:16:23,834 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:23,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:23,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1145286776, now seen corresponding path program 31 times [2020-10-26 19:16:23,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:23,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109150410] [2020-10-26 19:16:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:23,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:27,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:28,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:28,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-26 19:16:28,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:28,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:16:28,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:28,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:16:28,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:28,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:16:28,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:29,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:29,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:29,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:29,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:29,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:29,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:29,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:29,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:29,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:29,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:29,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2020-10-26 19:16:29,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109150410] [2020-10-26 19:16:29,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:29,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:16:29,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683424061] [2020-10-26 19:16:29,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:16:29,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:29,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:16:29,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:16:29,605 INFO L87 Difference]: Start difference. First operand 179 states and 212 transitions. Second operand 36 states. [2020-10-26 19:16:30,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:30,148 INFO L93 Difference]: Finished difference Result 295 states and 364 transitions. [2020-10-26 19:16:30,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:16:30,149 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 174 [2020-10-26 19:16:30,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:30,151 INFO L225 Difference]: With dead ends: 295 [2020-10-26 19:16:30,151 INFO L226 Difference]: Without dead ends: 187 [2020-10-26 19:16:30,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:16:30,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-26 19:16:30,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2020-10-26 19:16:30,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-26 19:16:30,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 218 transitions. [2020-10-26 19:16:30,159 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 218 transitions. Word has length 174 [2020-10-26 19:16:30,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:30,159 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 218 transitions. [2020-10-26 19:16:30,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:16:30,159 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 218 transitions. [2020-10-26 19:16:30,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-26 19:16:30,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:30,161 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:30,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:16:30,161 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:30,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:30,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1374719941, now seen corresponding path program 32 times [2020-10-26 19:16:30,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:30,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800527234] [2020-10-26 19:16:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:30,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:34,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:35,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:35,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-26 19:16:35,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:35,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5592 [2020-10-26 19:16:35,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:35,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:16:35,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:35,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:16:35,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:36,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:36,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:36,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:36,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:36,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:36,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:36,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:36,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:36,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:36,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:36,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2609 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-26 19:16:36,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800527234] [2020-10-26 19:16:36,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:36,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:16:36,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778846094] [2020-10-26 19:16:36,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:16:36,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:36,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:16:36,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:16:36,569 INFO L87 Difference]: Start difference. First operand 184 states and 218 transitions. Second operand 37 states. [2020-10-26 19:16:37,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:37,123 INFO L93 Difference]: Finished difference Result 303 states and 374 transitions. [2020-10-26 19:16:37,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:16:37,123 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 179 [2020-10-26 19:16:37,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:37,125 INFO L225 Difference]: With dead ends: 303 [2020-10-26 19:16:37,125 INFO L226 Difference]: Without dead ends: 192 [2020-10-26 19:16:37,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:16:37,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-26 19:16:37,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2020-10-26 19:16:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-26 19:16:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 224 transitions. [2020-10-26 19:16:37,135 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 224 transitions. Word has length 179 [2020-10-26 19:16:37,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:37,135 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 224 transitions. [2020-10-26 19:16:37,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:16:37,135 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 224 transitions. [2020-10-26 19:16:37,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-26 19:16:37,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:37,137 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:37,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:16:37,137 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:37,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:37,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1654511340, now seen corresponding path program 33 times [2020-10-26 19:16:37,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:37,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256467755] [2020-10-26 19:16:37,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:37,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:41,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:42,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:42,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-26 19:16:42,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:16:42,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:16:42,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:42,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:16:42,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:42,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:16:42,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:43,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:43,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:43,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:43,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:43,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:43,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:16:43,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:43,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:43,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:43,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:43,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2773 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-26 19:16:43,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256467755] [2020-10-26 19:16:43,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:43,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:16:43,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937831165] [2020-10-26 19:16:43,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:16:43,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:43,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:16:43,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:16:43,044 INFO L87 Difference]: Start difference. First operand 189 states and 224 transitions. Second operand 38 states. [2020-10-26 19:16:43,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:43,523 INFO L93 Difference]: Finished difference Result 311 states and 384 transitions. [2020-10-26 19:16:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:16:43,523 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 184 [2020-10-26 19:16:43,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:43,525 INFO L225 Difference]: With dead ends: 311 [2020-10-26 19:16:43,525 INFO L226 Difference]: Without dead ends: 197 [2020-10-26 19:16:43,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:16:43,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-26 19:16:43,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2020-10-26 19:16:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-26 19:16:43,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 230 transitions. [2020-10-26 19:16:43,534 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 230 transitions. Word has length 184 [2020-10-26 19:16:43,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:43,534 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 230 transitions. [2020-10-26 19:16:43,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:16:43,534 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 230 transitions. [2020-10-26 19:16:43,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-26 19:16:43,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:43,535 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:43,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:16:43,536 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:43,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1123700833, now seen corresponding path program 34 times [2020-10-26 19:16:43,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:43,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177960126] [2020-10-26 19:16:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:43,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:48,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:48,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-26 19:16:48,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:48,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-26 19:16:48,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:48,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:16:48,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:48,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:16:48,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:49,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:49,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:49,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:49,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:49,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:49,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:16:49,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:49,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:49,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:49,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:49,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2942 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-10-26 19:16:49,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177960126] [2020-10-26 19:16:49,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:49,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:16:49,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207452233] [2020-10-26 19:16:49,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:16:49,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:49,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:16:49,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:16:49,501 INFO L87 Difference]: Start difference. First operand 194 states and 230 transitions. Second operand 39 states. [2020-10-26 19:16:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:50,094 INFO L93 Difference]: Finished difference Result 319 states and 394 transitions. [2020-10-26 19:16:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:16:50,094 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 189 [2020-10-26 19:16:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:50,095 INFO L225 Difference]: With dead ends: 319 [2020-10-26 19:16:50,096 INFO L226 Difference]: Without dead ends: 202 [2020-10-26 19:16:50,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:16:50,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-26 19:16:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2020-10-26 19:16:50,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-26 19:16:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 236 transitions. [2020-10-26 19:16:50,104 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 236 transitions. Word has length 189 [2020-10-26 19:16:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:50,104 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 236 transitions. [2020-10-26 19:16:50,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:16:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 236 transitions. [2020-10-26 19:16:50,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-26 19:16:50,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:50,106 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:50,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:16:50,106 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:50,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:50,107 INFO L82 PathProgramCache]: Analyzing trace with hash 43998800, now seen corresponding path program 35 times [2020-10-26 19:16:50,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:50,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163081775] [2020-10-26 19:16:50,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:50,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:55,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:55,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-26 19:16:55,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:55,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-26 19:16:55,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:55,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:16:55,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:55,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:16:55,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:56,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:56,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:56,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:56,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:56,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:56,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:56,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:56,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:56,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:56,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:56,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-10-26 19:16:56,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163081775] [2020-10-26 19:16:56,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:56,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:16:56,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701250713] [2020-10-26 19:16:56,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:16:56,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:56,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:16:56,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:16:56,141 INFO L87 Difference]: Start difference. First operand 199 states and 236 transitions. Second operand 40 states. [2020-10-26 19:16:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:56,728 INFO L93 Difference]: Finished difference Result 327 states and 404 transitions. [2020-10-26 19:16:56,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:16:56,729 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 194 [2020-10-26 19:16:56,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:56,731 INFO L225 Difference]: With dead ends: 327 [2020-10-26 19:16:56,731 INFO L226 Difference]: Without dead ends: 207 [2020-10-26 19:16:56,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:16:56,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-26 19:16:56,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2020-10-26 19:16:56,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-26 19:16:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 242 transitions. [2020-10-26 19:16:56,740 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 242 transitions. Word has length 194 [2020-10-26 19:16:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:56,740 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 242 transitions. [2020-10-26 19:16:56,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:16:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 242 transitions. [2020-10-26 19:16:56,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-26 19:16:56,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:56,741 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:56,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:16:56,742 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:56,742 INFO L82 PathProgramCache]: Analyzing trace with hash 291959037, now seen corresponding path program 36 times [2020-10-26 19:16:56,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:56,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631344317] [2020-10-26 19:16:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:56,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:01,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:01,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-26 19:17:01,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:01,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-26 19:17:01,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:01,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:17:01,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:01,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:17:01,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:02,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:02,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:02,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:02,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:02,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:02,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:02,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:02,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:02,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:02,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:02,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3295 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2020-10-26 19:17:02,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631344317] [2020-10-26 19:17:02,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:02,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:17:02,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122479558] [2020-10-26 19:17:02,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:17:02,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:02,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:17:02,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:17:02,812 INFO L87 Difference]: Start difference. First operand 204 states and 242 transitions. Second operand 41 states. [2020-10-26 19:17:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:03,297 INFO L93 Difference]: Finished difference Result 335 states and 414 transitions. [2020-10-26 19:17:03,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:17:03,298 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 199 [2020-10-26 19:17:03,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:03,299 INFO L225 Difference]: With dead ends: 335 [2020-10-26 19:17:03,299 INFO L226 Difference]: Without dead ends: 212 [2020-10-26 19:17:03,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:17:03,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-26 19:17:03,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 209. [2020-10-26 19:17:03,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-26 19:17:03,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 248 transitions. [2020-10-26 19:17:03,307 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 248 transitions. Word has length 199 [2020-10-26 19:17:03,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:03,308 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 248 transitions. [2020-10-26 19:17:03,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:17:03,308 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 248 transitions. [2020-10-26 19:17:03,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-26 19:17:03,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:03,309 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:03,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:17:03,310 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:03,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:03,310 INFO L82 PathProgramCache]: Analyzing trace with hash 739976628, now seen corresponding path program 37 times [2020-10-26 19:17:03,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:03,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124281768] [2020-10-26 19:17:03,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:03,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:08,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:08,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-26 19:17:08,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:08,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5265 [2020-10-26 19:17:08,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:08,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:17:08,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:08,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:17:08,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:09,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:09,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:09,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:09,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:09,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:09,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:17:09,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:09,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:09,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:09,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:09,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3479 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2020-10-26 19:17:09,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124281768] [2020-10-26 19:17:09,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:09,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:17:09,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304523205] [2020-10-26 19:17:09,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:17:09,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:09,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:17:09,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:17:09,634 INFO L87 Difference]: Start difference. First operand 209 states and 248 transitions. Second operand 42 states. [2020-10-26 19:17:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:10,272 INFO L93 Difference]: Finished difference Result 343 states and 424 transitions. [2020-10-26 19:17:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:17:10,273 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 204 [2020-10-26 19:17:10,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:10,275 INFO L225 Difference]: With dead ends: 343 [2020-10-26 19:17:10,275 INFO L226 Difference]: Without dead ends: 217 [2020-10-26 19:17:10,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:17:10,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-26 19:17:10,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2020-10-26 19:17:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-26 19:17:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 254 transitions. [2020-10-26 19:17:10,284 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 254 transitions. Word has length 204 [2020-10-26 19:17:10,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:10,284 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 254 transitions. [2020-10-26 19:17:10,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:17:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 254 transitions. [2020-10-26 19:17:10,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-26 19:17:10,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:10,286 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:10,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:17:10,286 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:10,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:10,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1784925799, now seen corresponding path program 38 times [2020-10-26 19:17:10,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:10,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445536064] [2020-10-26 19:17:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:10,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:15,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:15,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-26 19:17:15,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:15,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:17:15,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:15,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:17:15,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:15,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:17:15,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:16,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:16,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:16,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:16,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:16,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:16,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:16,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:16,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:16,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:16,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:16,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3668 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2020-10-26 19:17:16,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445536064] [2020-10-26 19:17:16,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:16,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:17:16,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372622618] [2020-10-26 19:17:16,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:17:16,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:16,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:17:16,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:17:16,398 INFO L87 Difference]: Start difference. First operand 214 states and 254 transitions. Second operand 43 states. [2020-10-26 19:17:17,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:17,020 INFO L93 Difference]: Finished difference Result 351 states and 434 transitions. [2020-10-26 19:17:17,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:17:17,020 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 209 [2020-10-26 19:17:17,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:17,022 INFO L225 Difference]: With dead ends: 351 [2020-10-26 19:17:17,022 INFO L226 Difference]: Without dead ends: 222 [2020-10-26 19:17:17,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:17:17,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-26 19:17:17,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 219. [2020-10-26 19:17:17,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-26 19:17:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 260 transitions. [2020-10-26 19:17:17,030 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 260 transitions. Word has length 209 [2020-10-26 19:17:17,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:17,031 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 260 transitions. [2020-10-26 19:17:17,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:17:17,031 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 260 transitions. [2020-10-26 19:17:17,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-26 19:17:17,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:17,032 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:17,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:17:17,033 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:17,033 INFO L82 PathProgramCache]: Analyzing trace with hash -689214184, now seen corresponding path program 39 times [2020-10-26 19:17:17,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:17,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420119750] [2020-10-26 19:17:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:17,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:22,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:22,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-26 19:17:22,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:22,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5166 [2020-10-26 19:17:22,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:22,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:17:22,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:22,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:17:22,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:23,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:23,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:23,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:23,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:23,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:23,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:17:23,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:23,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:23,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:23,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:23,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3862 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2020-10-26 19:17:23,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420119750] [2020-10-26 19:17:23,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:23,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:17:23,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883764281] [2020-10-26 19:17:23,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:17:23,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:23,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:17:23,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:17:23,346 INFO L87 Difference]: Start difference. First operand 219 states and 260 transitions. Second operand 44 states. [2020-10-26 19:17:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:24,007 INFO L93 Difference]: Finished difference Result 359 states and 444 transitions. [2020-10-26 19:17:24,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:17:24,008 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 214 [2020-10-26 19:17:24,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:24,010 INFO L225 Difference]: With dead ends: 359 [2020-10-26 19:17:24,010 INFO L226 Difference]: Without dead ends: 227 [2020-10-26 19:17:24,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:17:24,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-26 19:17:24,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2020-10-26 19:17:24,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-26 19:17:24,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 266 transitions. [2020-10-26 19:17:24,019 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 266 transitions. Word has length 214 [2020-10-26 19:17:24,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:24,019 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 266 transitions. [2020-10-26 19:17:24,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:17:24,019 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 266 transitions. [2020-10-26 19:17:24,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-26 19:17:24,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:24,021 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:24,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:17:24,021 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:24,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:24,022 INFO L82 PathProgramCache]: Analyzing trace with hash -830483915, now seen corresponding path program 40 times [2020-10-26 19:17:24,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:24,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372717737] [2020-10-26 19:17:24,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:24,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:24,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking...