/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/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:40:18,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:40:18,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:40:18,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:40:18,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:40:18,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:40:18,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:40:18,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:40:18,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:40:18,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:40:18,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:40:18,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:40:18,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:40:18,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:40:18,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:40:18,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:40:18,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:40:18,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:40:18,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:40:18,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:40:18,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:40:18,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:40:18,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:40:18,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:40:18,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:40:18,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:40:18,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:40:18,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:40:18,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:40:18,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:40:18,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:40:18,421 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:40:18,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:40:18,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:40:18,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:40:18,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:40:18,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:40:18,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:40:18,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:40:18,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:40:18,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:40:18,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:40:18,489 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:40:18,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:40:18,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:40:18,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:40:18,493 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:40:18,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:40:18,494 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:40:18,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:40:18,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:40:18,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:40:18,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:40:18,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:40:18,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:40:18,496 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:40:18,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:40:18,497 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:40:18,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:40:18,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:40:18,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:40:18,497 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:40:18,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:40:18,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:40:18,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:40:18,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:40:18,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:40:18,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:40:18,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:40:18,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:40:18,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:40:18,500 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:40:18,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:40:18,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:40:18,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:40:18,903 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:40:18,903 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:40:18,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-10-27 01:40:18,995 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/adf7479cf/dcb7dd50cd954e41ab85610a3b9454ec/FLAGcb4a6daa6 [2020-10-27 01:40:19,545 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:40:19,546 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-10-27 01:40:19,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/adf7479cf/dcb7dd50cd954e41ab85610a3b9454ec/FLAGcb4a6daa6 [2020-10-27 01:40:19,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/adf7479cf/dcb7dd50cd954e41ab85610a3b9454ec [2020-10-27 01:40:19,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:40:19,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:40:19,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:40:19,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:40:19,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:40:19,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:40:19" (1/1) ... [2020-10-27 01:40:19,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f51e128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:19, skipping insertion in model container [2020-10-27 01:40:19,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:40:19" (1/1) ... [2020-10-27 01:40:19,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:40:19,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:40:20,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:40:20,207 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:40:20,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:40:20,237 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:40:20,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:20 WrapperNode [2020-10-27 01:40:20,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:40:20,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:40:20,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:40:20,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:40:20,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:20" (1/1) ... [2020-10-27 01:40:20,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:20" (1/1) ... [2020-10-27 01:40:20,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:20" (1/1) ... [2020-10-27 01:40:20,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:20" (1/1) ... [2020-10-27 01:40:20,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:20" (1/1) ... [2020-10-27 01:40:20,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:20" (1/1) ... [2020-10-27 01:40:20,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:20" (1/1) ... [2020-10-27 01:40:20,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:40:20,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:40:20,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:40:20,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:40:20,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:40:20,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:40:20,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:40:20,361 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:40:20,361 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 01:40:20,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:40:20,362 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:40:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:40:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:40:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:40:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:40:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:40:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:40:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 01:40:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:40:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:40:20,364 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:40:20,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:40:20,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:40:20,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:40:20,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:40:20,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:40:20,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:40:20,669 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:40:20,669 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:40:20,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:40:20 BoogieIcfgContainer [2020-10-27 01:40:20,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:40:20,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:40:20,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:40:20,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:40:20,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:40:19" (1/3) ... [2020-10-27 01:40:20,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d7d004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:40:20, skipping insertion in model container [2020-10-27 01:40:20,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:20" (2/3) ... [2020-10-27 01:40:20,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d7d004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:40:20, skipping insertion in model container [2020-10-27 01:40:20,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:40:20" (3/3) ... [2020-10-27 01:40:20,680 INFO L111 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-10-27 01:40:20,692 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:40:20,697 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:40:20,711 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:40:20,768 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:40:20,768 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:40:20,768 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:40:20,768 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:40:20,768 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:40:20,768 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:40:20,769 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:40:20,769 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:40:20,786 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-27 01:40:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:40:20,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:20,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:20,793 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:20,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:20,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2005588687, now seen corresponding path program 1 times [2020-10-27 01:40:20,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:20,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723865265] [2020-10-27 01:40:20,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:20,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:21,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:21,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:21,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:40:21,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:40:21,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-27 01:40:21,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:21,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:40:21,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:21,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:40:21,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:40:21,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:21,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:21,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:21,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:21,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:21,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:40:21,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:21,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:21,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:21,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:21,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:21,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723865265] [2020-10-27 01:40:21,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:40:21,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:40:21,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309326363] [2020-10-27 01:40:21,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:40:21,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:21,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:40:21,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:40:21,461 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-10-27 01:40:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:21,744 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-10-27 01:40:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:40:21,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-27 01:40:21,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:21,753 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:40:21,753 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:40:21,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:40:21,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:40:21,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 01:40:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:40:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-27 01:40:21,796 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-10-27 01:40:21,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:21,797 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-27 01:40:21,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:40:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-27 01:40:21,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:40:21,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:21,798 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:21,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:40:21,799 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:21,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:21,800 INFO L82 PathProgramCache]: Analyzing trace with hash -338650440, now seen corresponding path program 1 times [2020-10-27 01:40:21,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:21,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034747435] [2020-10-27 01:40:21,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:21,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:22,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:40:22,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:22,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-27 01:40:22,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:22,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:40:22,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:22,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:40:22,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:22,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:22,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:22,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:22,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:22,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:40:22,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:22,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:22,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:22,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:22,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:22,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034747435] [2020-10-27 01:40:22,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:22,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:40:22,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992380160] [2020-10-27 01:40:22,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:40:22,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:22,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:40:22,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:40:22,104 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2020-10-27 01:40:22,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:22,295 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-10-27 01:40:22,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:40:22,296 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 01:40:22,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:22,297 INFO L225 Difference]: With dead ends: 29 [2020-10-27 01:40:22,297 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 01:40:22,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:22,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 01:40:22,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 01:40:22,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:40:22,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-27 01:40:22,306 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2020-10-27 01:40:22,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:22,306 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-27 01:40:22,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:40:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-27 01:40:22,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:40:22,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:22,308 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:22,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:40:22,308 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:22,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:22,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1757895990, now seen corresponding path program 2 times [2020-10-27 01:40:22,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:22,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193495117] [2020-10-27 01:40:22,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:22,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:22,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:40:22,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:22,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-27 01:40:22,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:22,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:40:22,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:22,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:40:22,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:40:22,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:22,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:22,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:22,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:22,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:40:22,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:22,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:22,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:22,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:22,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:22,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193495117] [2020-10-27 01:40:22,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:22,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:40:22,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493489130] [2020-10-27 01:40:22,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:40:22,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:22,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:40:22,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:40:22,676 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2020-10-27 01:40:22,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:22,916 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-27 01:40:22,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:40:22,916 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 01:40:22,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:22,917 INFO L225 Difference]: With dead ends: 32 [2020-10-27 01:40:22,918 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:40:22,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:40:22,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:40:22,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 01:40:22,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:40:22,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-27 01:40:22,926 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 21 [2020-10-27 01:40:22,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:22,926 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-27 01:40:22,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:40:22,927 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-27 01:40:22,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:40:22,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:22,928 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:22,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:40:22,928 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:22,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:22,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1450953080, now seen corresponding path program 3 times [2020-10-27 01:40:22,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:22,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75520631] [2020-10-27 01:40:22,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:22,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:23,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:23,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:40:23,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:23,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-27 01:40:23,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:23,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:40:23,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:23,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:40:23,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:23,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:23,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:23,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:23,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:23,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:23,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:40:23,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:23,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:23,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:23,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:23,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:23,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75520631] [2020-10-27 01:40:23,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:23,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:40:23,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012053092] [2020-10-27 01:40:23,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:40:23,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:23,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:40:23,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:40:23,194 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 9 states. [2020-10-27 01:40:23,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:23,466 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-27 01:40:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:40:23,467 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-27 01:40:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:23,468 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:40:23,468 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:40:23,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:40:23,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:40:23,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-27 01:40:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:40:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-27 01:40:23,476 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 24 [2020-10-27 01:40:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:23,476 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-27 01:40:23,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:40:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-27 01:40:23,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:40:23,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:23,478 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:23,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:40:23,478 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:23,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:23,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1108476918, now seen corresponding path program 4 times [2020-10-27 01:40:23,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:23,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813512782] [2020-10-27 01:40:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:23,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:23,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:23,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:40:23,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:23,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-27 01:40:23,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:23,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:40:23,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:23,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:40:23,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:23,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:23,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:23,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:23,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:23,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:23,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:23,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:23,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:23,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:23,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:23,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:23,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813512782] [2020-10-27 01:40:23,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:23,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:40:23,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010773729] [2020-10-27 01:40:23,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:40:23,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:23,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:40:23,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:40:23,752 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 10 states. [2020-10-27 01:40:24,188 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-10-27 01:40:24,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:24,235 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-27 01:40:24,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:40:24,236 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 01:40:24,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:24,237 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:40:24,237 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:40:24,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:40:24,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:40:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 01:40:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:40:24,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-27 01:40:24,245 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 27 [2020-10-27 01:40:24,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:24,245 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-27 01:40:24,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:40:24,245 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-27 01:40:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:40:24,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:24,246 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:24,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:40:24,246 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:24,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:24,247 INFO L82 PathProgramCache]: Analyzing trace with hash -533141448, now seen corresponding path program 5 times [2020-10-27 01:40:24,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:24,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804537505] [2020-10-27 01:40:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:24,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:24,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:24,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:40:24,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:24,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-27 01:40:24,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:24,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:40:24,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:24,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:40:24,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:24,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:24,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:24,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:24,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:24,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:24,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:24,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:24,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:24,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:24,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:24,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:24,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804537505] [2020-10-27 01:40:24,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:24,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:40:24,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14157961] [2020-10-27 01:40:24,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:40:24,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:24,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:40:24,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:40:24,563 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 11 states. [2020-10-27 01:40:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:25,006 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-10-27 01:40:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:40:25,006 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-27 01:40:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:25,007 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:40:25,008 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:40:25,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:25,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:40:25,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-27 01:40:25,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:40:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-27 01:40:25,016 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 30 [2020-10-27 01:40:25,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:25,016 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-27 01:40:25,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:40:25,016 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-27 01:40:25,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:40:25,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:25,017 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:25,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:40:25,018 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:25,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:25,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1928633014, now seen corresponding path program 6 times [2020-10-27 01:40:25,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:25,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804124313] [2020-10-27 01:40:25,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:25,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:25,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:25,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:40:25,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:25,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-27 01:40:25,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:25,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:40:25,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:25,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:40:25,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:25,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:25,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:25,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:25,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:25,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:25,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:25,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:25,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:25,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:25,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:25,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:25,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804124313] [2020-10-27 01:40:25,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:25,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:40:25,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958992307] [2020-10-27 01:40:25,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:40:25,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:25,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:40:25,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:40:25,396 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 12 states. [2020-10-27 01:40:25,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:25,950 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-10-27 01:40:25,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:40:25,951 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 01:40:25,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:25,952 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:40:25,952 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:40:25,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:40:25,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:40:25,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 01:40:25,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:40:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-27 01:40:25,961 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 33 [2020-10-27 01:40:25,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:25,962 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-27 01:40:25,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:40:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-27 01:40:25,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:40:25,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:25,963 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:25,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:40:25,964 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:25,964 INFO L82 PathProgramCache]: Analyzing trace with hash 265549560, now seen corresponding path program 7 times [2020-10-27 01:40:25,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:25,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087372927] [2020-10-27 01:40:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:25,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:26,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:26,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:40:26,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:26,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-27 01:40:26,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:26,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:40:26,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:26,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:40:26,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:26,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:26,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:26,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:26,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:26,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:26,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:26,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:26,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:26,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:26,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:26,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:26,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087372927] [2020-10-27 01:40:26,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:26,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:40:26,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475544294] [2020-10-27 01:40:26,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:40:26,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:26,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:40:26,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:40:26,353 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 13 states. [2020-10-27 01:40:27,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:27,010 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-27 01:40:27,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:40:27,011 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-27 01:40:27,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:27,011 INFO L225 Difference]: With dead ends: 47 [2020-10-27 01:40:27,012 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 01:40:27,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:40:27,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 01:40:27,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-27 01:40:27,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:40:27,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-27 01:40:27,022 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 36 [2020-10-27 01:40:27,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:27,022 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-27 01:40:27,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:40:27,023 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-27 01:40:27,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:40:27,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:27,024 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:27,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:40:27,024 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:27,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:27,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2051333770, now seen corresponding path program 8 times [2020-10-27 01:40:27,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:27,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939194715] [2020-10-27 01:40:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:27,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:27,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:27,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:40:27,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:27,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-27 01:40:27,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:27,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:40:27,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:27,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:40:27,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:27,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:27,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:27,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:27,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:27,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:27,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:40:27,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:27,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:27,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:27,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:27,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:27,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939194715] [2020-10-27 01:40:27,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:27,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:40:27,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19396161] [2020-10-27 01:40:27,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:40:27,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:27,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:40:27,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:40:27,600 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 14 states. [2020-10-27 01:40:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:28,370 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-27 01:40:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:40:28,371 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-27 01:40:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:28,372 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:40:28,372 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:40:28,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:40:28,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:40:28,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 01:40:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:40:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-10-27 01:40:28,380 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 39 [2020-10-27 01:40:28,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:28,381 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-10-27 01:40:28,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:40:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-10-27 01:40:28,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:40:28,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:28,382 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:28,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:40:28,382 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:28,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:28,383 INFO L82 PathProgramCache]: Analyzing trace with hash 588838328, now seen corresponding path program 9 times [2020-10-27 01:40:28,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:28,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145265870] [2020-10-27 01:40:28,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:28,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:28,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:28,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:40:28,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:28,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-27 01:40:28,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:28,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:40:28,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:28,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:40:28,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:28,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:28,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:28,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:28,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:28,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:28,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:28,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:28,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:28,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:28,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:28,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:28,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145265870] [2020-10-27 01:40:28,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:28,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:40:28,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639749353] [2020-10-27 01:40:28,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:40:28,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:28,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:40:28,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:40:28,880 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 15 states. [2020-10-27 01:40:29,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:29,813 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-27 01:40:29,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:40:29,814 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-27 01:40:29,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:29,815 INFO L225 Difference]: With dead ends: 53 [2020-10-27 01:40:29,815 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 01:40:29,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:40:29,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 01:40:29,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-27 01:40:29,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:40:29,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-10-27 01:40:29,825 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 42 [2020-10-27 01:40:29,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:29,825 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-10-27 01:40:29,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:40:29,825 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-10-27 01:40:29,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:40:29,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:29,826 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:29,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:40:29,827 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:29,828 INFO L82 PathProgramCache]: Analyzing trace with hash -464623670, now seen corresponding path program 10 times [2020-10-27 01:40:29,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:29,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632193250] [2020-10-27 01:40:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:29,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:30,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:30,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:40:30,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:30,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-27 01:40:30,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:30,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:40:30,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:30,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:40:30,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:30,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:30,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:30,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:30,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:30,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:30,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:30,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:30,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:30,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:30,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:30,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:30,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632193250] [2020-10-27 01:40:30,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:30,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:40:30,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213193070] [2020-10-27 01:40:30,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:40:30,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:30,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:40:30,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:40:30,432 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 16 states. [2020-10-27 01:40:31,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:31,416 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2020-10-27 01:40:31,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:40:31,416 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-27 01:40:31,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:31,418 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:40:31,418 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:40:31,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:40:31,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:40:31,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 01:40:31,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:40:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-10-27 01:40:31,440 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 45 [2020-10-27 01:40:31,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:31,440 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-10-27 01:40:31,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:40:31,440 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-10-27 01:40:31,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:40:31,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:31,441 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:31,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:40:31,442 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:31,442 INFO L82 PathProgramCache]: Analyzing trace with hash -824974216, now seen corresponding path program 11 times [2020-10-27 01:40:31,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:31,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498300430] [2020-10-27 01:40:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:31,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:31,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:31,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:40:31,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:31,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-10-27 01:40:31,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:31,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:40:31,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:31,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:40:31,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:40:32,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:32,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:32,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:32,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:32,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:32,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:32,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:32,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:32,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:32,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:32,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:32,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498300430] [2020-10-27 01:40:32,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:32,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:40:32,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998056113] [2020-10-27 01:40:32,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:40:32,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:32,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:40:32,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:40:32,178 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 17 states. [2020-10-27 01:40:33,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:33,255 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2020-10-27 01:40:33,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:40:33,257 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-10-27 01:40:33,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:33,258 INFO L225 Difference]: With dead ends: 59 [2020-10-27 01:40:33,258 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:40:33,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:40:33,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:40:33,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-27 01:40:33,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:40:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2020-10-27 01:40:33,278 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 48 [2020-10-27 01:40:33,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:33,278 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2020-10-27 01:40:33,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:40:33,278 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2020-10-27 01:40:33,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:40:33,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:33,283 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:33,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:40:33,283 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:33,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:33,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1390149898, now seen corresponding path program 12 times [2020-10-27 01:40:33,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:33,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937920155] [2020-10-27 01:40:33,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:33,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:33,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:33,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:40:33,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:33,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-27 01:40:33,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:33,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:40:33,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:33,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:40:33,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:34,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:34,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:34,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:34,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:34,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:34,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:40:34,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:34,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:34,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:34,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:34,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:34,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937920155] [2020-10-27 01:40:34,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:34,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:40:34,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468374903] [2020-10-27 01:40:34,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:40:34,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:34,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:40:34,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:40:34,068 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 18 states. [2020-10-27 01:40:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:35,252 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2020-10-27 01:40:35,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:40:35,253 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-27 01:40:35,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:35,254 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:40:35,254 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:40:35,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:40:35,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:40:35,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 01:40:35,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:40:35,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2020-10-27 01:40:35,266 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 51 [2020-10-27 01:40:35,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:35,266 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2020-10-27 01:40:35,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:40:35,266 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2020-10-27 01:40:35,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:40:35,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:35,267 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:35,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:40:35,268 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:35,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:35,269 INFO L82 PathProgramCache]: Analyzing trace with hash -19872968, now seen corresponding path program 13 times [2020-10-27 01:40:35,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:35,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114571521] [2020-10-27 01:40:35,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:35,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:35,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:35,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:40:35,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:35,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-27 01:40:35,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:35,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:40:35,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:35,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:40:35,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:36,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:36,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:36,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:36,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:36,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:36,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:36,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:36,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:36,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:36,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:36,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:36,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114571521] [2020-10-27 01:40:36,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:36,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:40:36,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276072622] [2020-10-27 01:40:36,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:40:36,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:36,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:40:36,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:40:36,090 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand 19 states. [2020-10-27 01:40:37,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:37,433 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-10-27 01:40:37,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:40:37,434 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2020-10-27 01:40:37,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:37,435 INFO L225 Difference]: With dead ends: 65 [2020-10-27 01:40:37,435 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 01:40:37,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:40:37,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 01:40:37,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-27 01:40:37,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:40:37,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2020-10-27 01:40:37,446 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 54 [2020-10-27 01:40:37,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:37,446 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2020-10-27 01:40:37,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:40:37,447 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2020-10-27 01:40:37,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:40:37,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:37,448 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:37,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:40:37,448 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:37,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:37,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1230919094, now seen corresponding path program 14 times [2020-10-27 01:40:37,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:37,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420831295] [2020-10-27 01:40:37,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:37,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:37,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:37,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:40:37,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:37,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-10-27 01:40:37,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:40:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:37,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:40:37,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:38,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:38,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:38,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:38,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:38,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:38,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:38,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:38,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:38,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420831295] [2020-10-27 01:40:38,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:38,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:40:38,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753292795] [2020-10-27 01:40:38,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:40:38,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:38,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:40:38,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:40:38,278 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 20 states. [2020-10-27 01:40:39,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:39,779 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-10-27 01:40:39,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:40:39,780 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-10-27 01:40:39,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:39,781 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:40:39,781 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:40:39,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:40:39,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:40:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-27 01:40:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:40:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2020-10-27 01:40:39,791 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 57 [2020-10-27 01:40:39,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:39,791 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2020-10-27 01:40:39,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:40:39,792 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2020-10-27 01:40:39,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:40:39,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:39,793 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:39,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:40:39,793 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:39,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:39,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1780772360, now seen corresponding path program 15 times [2020-10-27 01:40:39,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:39,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023959817] [2020-10-27 01:40:39,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:39,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:40,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:40,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:40:40,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:40,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 533 [2020-10-27 01:40:40,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:40,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:40:40,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:40,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:40:40,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:40,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:40,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:40,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:40,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:40,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:40,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:40,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:40,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:40,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:40,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:40,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:40,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023959817] [2020-10-27 01:40:40,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:40,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:40:40,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123737812] [2020-10-27 01:40:40,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:40:40,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:40,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:40:40,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:40:40,728 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 21 states. [2020-10-27 01:40:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:42,368 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2020-10-27 01:40:42,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:40:42,374 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2020-10-27 01:40:42,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:42,375 INFO L225 Difference]: With dead ends: 71 [2020-10-27 01:40:42,375 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 01:40:42,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:40:42,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 01:40:42,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-27 01:40:42,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 01:40:42,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2020-10-27 01:40:42,396 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 60 [2020-10-27 01:40:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:42,399 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2020-10-27 01:40:42,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:40:42,399 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2020-10-27 01:40:42,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 01:40:42,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:42,400 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:42,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:40:42,401 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:42,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:42,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1454152822, now seen corresponding path program 16 times [2020-10-27 01:40:42,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:42,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206535573] [2020-10-27 01:40:42,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:42,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:43,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:43,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:40:43,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:43,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 581 [2020-10-27 01:40:43,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:43,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:40:43,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:43,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 01:40:43,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:43,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:43,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:43,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:43,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:43,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:43,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:43,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:43,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:43,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:43,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:43,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:43,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206535573] [2020-10-27 01:40:43,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:43,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:40:43,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852972743] [2020-10-27 01:40:43,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:40:43,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:43,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:40:43,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:40:43,426 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand 22 states. [2020-10-27 01:40:45,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:45,226 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-10-27 01:40:45,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:40:45,227 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-10-27 01:40:45,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:45,227 INFO L225 Difference]: With dead ends: 74 [2020-10-27 01:40:45,228 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:40:45,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:40:45,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:40:45,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-27 01:40:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:40:45,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2020-10-27 01:40:45,238 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 63 [2020-10-27 01:40:45,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:45,238 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2020-10-27 01:40:45,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:40:45,238 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2020-10-27 01:40:45,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:40:45,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:45,239 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:45,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:40:45,240 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:45,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:45,240 INFO L82 PathProgramCache]: Analyzing trace with hash 767578296, now seen corresponding path program 17 times [2020-10-27 01:40:45,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:45,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688909642] [2020-10-27 01:40:45,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:45,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:45,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:45,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 01:40:45,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:45,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 667 [2020-10-27 01:40:45,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:45,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:40:45,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:45,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 01:40:45,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:46,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:46,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:46,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:46,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:46,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:46,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:46,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:46,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:46,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:46,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:46,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:46,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688909642] [2020-10-27 01:40:46,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:46,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:40:46,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561019548] [2020-10-27 01:40:46,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:40:46,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:46,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:40:46,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:40:46,355 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 23 states. [2020-10-27 01:40:48,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:48,346 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2020-10-27 01:40:48,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:40:48,347 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 66 [2020-10-27 01:40:48,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:48,348 INFO L225 Difference]: With dead ends: 77 [2020-10-27 01:40:48,348 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 01:40:48,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=125, Invalid=1681, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:40:48,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 01:40:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-27 01:40:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 01:40:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2020-10-27 01:40:48,359 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 66 [2020-10-27 01:40:48,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:48,359 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2020-10-27 01:40:48,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:40:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2020-10-27 01:40:48,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 01:40:48,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:48,360 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:48,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:40:48,361 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:48,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:48,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1381684022, now seen corresponding path program 18 times [2020-10-27 01:40:48,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:48,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787054620] [2020-10-27 01:40:48,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:48,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:49,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:49,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:40:49,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:49,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 766 [2020-10-27 01:40:49,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:49,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:40:49,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:49,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 01:40:49,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:49,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:49,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:49,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:49,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:49,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:49,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:40:49,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:49,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:49,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:49,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:49,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:49,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787054620] [2020-10-27 01:40:49,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:49,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:40:49,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439686433] [2020-10-27 01:40:49,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:40:49,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:49,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:40:49,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:40:49,627 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 24 states. [2020-10-27 01:40:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:51,857 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2020-10-27 01:40:51,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:40:51,857 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-10-27 01:40:51,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:51,859 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:40:51,859 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 01:40:51,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=131, Invalid=1849, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:40:51,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 01:40:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-27 01:40:51,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:40:51,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2020-10-27 01:40:51,869 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 69 [2020-10-27 01:40:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:51,869 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2020-10-27 01:40:51,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:40:51,870 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2020-10-27 01:40:51,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:40:51,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:51,871 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:51,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:40:51,871 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:51,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:51,871 INFO L82 PathProgramCache]: Analyzing trace with hash -682950792, now seen corresponding path program 19 times [2020-10-27 01:40:51,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:51,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338490656] [2020-10-27 01:40:51,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:51,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:52,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:52,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:40:52,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:52,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 762 [2020-10-27 01:40:52,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:52,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:40:52,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:52,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 01:40:52,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:53,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:53,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:53,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:53,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:53,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:53,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:53,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:53,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:53,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:53,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:53,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:53,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338490656] [2020-10-27 01:40:53,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:53,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:40:53,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769669541] [2020-10-27 01:40:53,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:40:53,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:53,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:40:53,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:40:53,174 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 25 states. [2020-10-27 01:40:55,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:55,535 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2020-10-27 01:40:55,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:40:55,536 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 72 [2020-10-27 01:40:55,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:55,537 INFO L225 Difference]: With dead ends: 83 [2020-10-27 01:40:55,537 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 01:40:55,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=137, Invalid=2025, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:40:55,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 01:40:55,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-27 01:40:55,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 01:40:55,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2020-10-27 01:40:55,547 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 72 [2020-10-27 01:40:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:55,548 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2020-10-27 01:40:55,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:40:55,548 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2020-10-27 01:40:55,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 01:40:55,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:55,549 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:55,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:40:55,549 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:55,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:55,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1867187722, now seen corresponding path program 20 times [2020-10-27 01:40:55,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:55,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746877829] [2020-10-27 01:40:55,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:55,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:56,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:56,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 01:40:56,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:56,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 785 [2020-10-27 01:40:56,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:56,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:40:56,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:40:56,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 01:40:56,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:56,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:56,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:56,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:56,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:56,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:56,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:40:56,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:56,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:56,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:56,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:56,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:56,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746877829] [2020-10-27 01:40:56,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:56,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:40:56,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288130764] [2020-10-27 01:40:56,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:40:56,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:56,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:40:56,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:40:56,920 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand 26 states. [2020-10-27 01:40:59,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:59,513 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2020-10-27 01:40:59,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:40:59,514 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-10-27 01:40:59,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:59,516 INFO L225 Difference]: With dead ends: 86 [2020-10-27 01:40:59,516 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:40:59,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=143, Invalid=2209, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:40:59,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:40:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-27 01:40:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 01:40:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2020-10-27 01:40:59,526 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 75 [2020-10-27 01:40:59,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:59,527 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2020-10-27 01:40:59,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:40:59,527 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2020-10-27 01:40:59,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 01:40:59,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:59,528 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:59,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:40:59,528 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:59,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:59,529 INFO L82 PathProgramCache]: Analyzing trace with hash -632840648, now seen corresponding path program 21 times [2020-10-27 01:40:59,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:59,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397350180] [2020-10-27 01:40:59,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:59,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:00,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:00,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 01:41:00,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:00,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 843 [2020-10-27 01:41:00,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:00,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:41:00,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:00,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 01:41:00,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:00,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:00,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:00,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:00,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:00,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:00,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:00,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:00,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:00,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:00,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:00,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:00,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397350180] [2020-10-27 01:41:00,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:00,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:41:00,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256736370] [2020-10-27 01:41:00,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:41:00,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:00,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:41:00,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:41:00,988 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand 27 states. [2020-10-27 01:41:03,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:03,811 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2020-10-27 01:41:03,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:41:03,815 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 78 [2020-10-27 01:41:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:03,816 INFO L225 Difference]: With dead ends: 89 [2020-10-27 01:41:03,816 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 01:41:03,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=149, Invalid=2401, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:41:03,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 01:41:03,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-27 01:41:03,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 01:41:03,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2020-10-27 01:41:03,826 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 78 [2020-10-27 01:41:03,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:03,826 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2020-10-27 01:41:03,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:41:03,826 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2020-10-27 01:41:03,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 01:41:03,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:03,827 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:03,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:41:03,827 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:03,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:03,828 INFO L82 PathProgramCache]: Analyzing trace with hash 49868618, now seen corresponding path program 22 times [2020-10-27 01:41:03,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:03,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257278175] [2020-10-27 01:41:03,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:03,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:04,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:04,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 01:41:04,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:04,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 868 [2020-10-27 01:41:04,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:04,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:41:04,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:04,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 01:41:04,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:05,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:05,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:05,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:05,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:05,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:05,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:05,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:05,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:05,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:05,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:05,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:05,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257278175] [2020-10-27 01:41:05,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:05,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:41:05,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065065257] [2020-10-27 01:41:05,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:41:05,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:05,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:41:05,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:41:05,452 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand 28 states. [2020-10-27 01:41:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:08,496 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2020-10-27 01:41:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:41:08,497 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 81 [2020-10-27 01:41:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:08,498 INFO L225 Difference]: With dead ends: 92 [2020-10-27 01:41:08,498 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 01:41:08,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=155, Invalid=2601, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:41:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 01:41:08,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-27 01:41:08,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 01:41:08,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2020-10-27 01:41:08,507 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 81 [2020-10-27 01:41:08,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:08,508 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2020-10-27 01:41:08,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:41:08,508 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2020-10-27 01:41:08,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 01:41:08,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:08,509 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:08,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:41:08,509 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:08,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:08,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1971465464, now seen corresponding path program 23 times [2020-10-27 01:41:08,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:08,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406768985] [2020-10-27 01:41:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:08,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:09,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:09,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 01:41:09,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:09,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 898 [2020-10-27 01:41:09,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:09,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:41:09,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:09,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 01:41:09,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:10,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:10,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:10,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:10,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:10,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:10,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:41:10,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:10,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:10,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:10,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:10,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:10,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406768985] [2020-10-27 01:41:10,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:10,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:41:10,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771505451] [2020-10-27 01:41:10,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:41:10,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:10,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:41:10,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:41:10,165 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand 29 states. [2020-10-27 01:41:13,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:13,418 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-10-27 01:41:13,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:41:13,419 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 84 [2020-10-27 01:41:13,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:13,420 INFO L225 Difference]: With dead ends: 95 [2020-10-27 01:41:13,420 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 01:41:13,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=207, Invalid=2763, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:41:13,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 01:41:13,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-27 01:41:13,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 01:41:13,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2020-10-27 01:41:13,429 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 84 [2020-10-27 01:41:13,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:13,429 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2020-10-27 01:41:13,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:41:13,429 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2020-10-27 01:41:13,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 01:41:13,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:13,430 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:13,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:41:13,433 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:13,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:13,434 INFO L82 PathProgramCache]: Analyzing trace with hash 644016266, now seen corresponding path program 24 times [2020-10-27 01:41:13,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:13,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540290447] [2020-10-27 01:41:13,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:13,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:14,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:14,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 01:41:14,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:14,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1098 [2020-10-27 01:41:14,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:14,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:41:14,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:14,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 01:41:14,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:15,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:15,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:15,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:15,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:15,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:15,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:15,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:15,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:15,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:15,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:15,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:15,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540290447] [2020-10-27 01:41:15,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:15,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:41:15,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088461956] [2020-10-27 01:41:15,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:41:15,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:15,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:41:15,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:41:15,317 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand 30 states. [2020-10-27 01:41:18,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:18,851 INFO L93 Difference]: Finished difference Result 98 states and 124 transitions. [2020-10-27 01:41:18,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:41:18,852 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 87 [2020-10-27 01:41:18,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:18,853 INFO L225 Difference]: With dead ends: 98 [2020-10-27 01:41:18,854 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 01:41:18,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=167, Invalid=3025, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:41:18,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 01:41:18,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-27 01:41:18,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 01:41:18,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2020-10-27 01:41:18,865 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 87 [2020-10-27 01:41:18,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:18,866 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2020-10-27 01:41:18,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:41:18,866 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2020-10-27 01:41:18,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 01:41:18,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:18,867 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:18,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:41:18,867 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:18,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:18,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1631147080, now seen corresponding path program 25 times [2020-10-27 01:41:18,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:18,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116269633] [2020-10-27 01:41:18,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:18,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:19,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:19,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 01:41:19,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:19,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1062 [2020-10-27 01:41:19,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:19,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:41:19,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:19,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 01:41:19,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:20,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:20,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:20,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:20,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:20,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:20,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:20,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:20,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:20,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:20,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:20,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:20,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116269633] [2020-10-27 01:41:20,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:20,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:41:20,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972783837] [2020-10-27 01:41:20,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:41:20,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:20,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:41:20,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:41:20,753 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand 31 states. [2020-10-27 01:41:24,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:24,528 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2020-10-27 01:41:24,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:41:24,529 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 90 [2020-10-27 01:41:24,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:24,530 INFO L225 Difference]: With dead ends: 101 [2020-10-27 01:41:24,530 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 01:41:24,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=173, Invalid=3249, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:41:24,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 01:41:24,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-27 01:41:24,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:41:24,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 121 transitions. [2020-10-27 01:41:24,542 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 121 transitions. Word has length 90 [2020-10-27 01:41:24,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:24,542 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 121 transitions. [2020-10-27 01:41:24,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:41:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 121 transitions. [2020-10-27 01:41:24,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 01:41:24,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:24,543 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:24,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:41:24,543 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:24,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:24,544 INFO L82 PathProgramCache]: Analyzing trace with hash -2143489590, now seen corresponding path program 26 times [2020-10-27 01:41:24,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:24,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300158153] [2020-10-27 01:41:24,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:24,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:25,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:25,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 01:41:25,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:25,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1059 [2020-10-27 01:41:25,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:25,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:41:25,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:25,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 01:41:25,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:26,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:26,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:26,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:26,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:26,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:26,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:26,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:26,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:26,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:26,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:26,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:26,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300158153] [2020-10-27 01:41:26,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:26,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:41:26,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485777891] [2020-10-27 01:41:26,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:41:26,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:26,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:41:26,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:41:26,522 INFO L87 Difference]: Start difference. First operand 94 states and 121 transitions. Second operand 32 states. [2020-10-27 01:41:30,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:30,579 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2020-10-27 01:41:30,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:41:30,579 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-10-27 01:41:30,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:30,581 INFO L225 Difference]: With dead ends: 104 [2020-10-27 01:41:30,581 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:41:30,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=179, Invalid=3481, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:41:30,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:41:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-27 01:41:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:41:30,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2020-10-27 01:41:30,593 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 93 [2020-10-27 01:41:30,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:30,593 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2020-10-27 01:41:30,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:41:30,593 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2020-10-27 01:41:30,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 01:41:30,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:30,594 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:30,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:41:30,594 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:30,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:30,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1025435016, now seen corresponding path program 27 times [2020-10-27 01:41:30,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:30,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198355639] [2020-10-27 01:41:30,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:30,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:31,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:31,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 01:41:31,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:31,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837 [2020-10-27 01:41:31,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:31,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:41:31,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:31,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 01:41:31,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:32,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:32,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:32,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:32,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:32,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:32,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:32,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:32,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:32,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:32,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:32,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:32,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198355639] [2020-10-27 01:41:32,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:32,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:41:32,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821767044] [2020-10-27 01:41:32,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:41:32,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:32,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:41:32,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:41:32,382 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand 33 states. [2020-10-27 01:41:36,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:36,735 INFO L93 Difference]: Finished difference Result 107 states and 136 transitions. [2020-10-27 01:41:36,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:41:36,736 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 96 [2020-10-27 01:41:36,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:36,737 INFO L225 Difference]: With dead ends: 107 [2020-10-27 01:41:36,737 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 01:41:36,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=185, Invalid=3721, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:41:36,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 01:41:36,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-27 01:41:36,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 01:41:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 129 transitions. [2020-10-27 01:41:36,747 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 129 transitions. Word has length 96 [2020-10-27 01:41:36,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:36,747 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 129 transitions. [2020-10-27 01:41:36,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:41:36,747 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 129 transitions. [2020-10-27 01:41:36,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 01:41:36,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:36,748 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:36,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:41:36,748 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:36,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:36,749 INFO L82 PathProgramCache]: Analyzing trace with hash -533001462, now seen corresponding path program 28 times [2020-10-27 01:41:36,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:36,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134869092] [2020-10-27 01:41:36,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:36,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:37,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:37,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 01:41:37,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:37,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 912 [2020-10-27 01:41:37,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:37,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:41:37,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:37,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 01:41:37,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:38,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:38,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:38,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:38,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:38,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:38,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:38,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:38,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:38,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:38,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:38,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:38,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134869092] [2020-10-27 01:41:38,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:38,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:41:38,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127914722] [2020-10-27 01:41:38,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:41:38,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:38,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:41:38,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:41:38,697 INFO L87 Difference]: Start difference. First operand 100 states and 129 transitions. Second operand 34 states. [2020-10-27 01:41:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:43,351 INFO L93 Difference]: Finished difference Result 110 states and 140 transitions. [2020-10-27 01:41:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:41:43,353 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 99 [2020-10-27 01:41:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:43,354 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:41:43,354 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 01:41:43,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=191, Invalid=3969, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:41:43,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 01:41:43,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-27 01:41:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 01:41:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 133 transitions. [2020-10-27 01:41:43,364 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 133 transitions. Word has length 99 [2020-10-27 01:41:43,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:43,364 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 133 transitions. [2020-10-27 01:41:43,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:41:43,364 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 133 transitions. [2020-10-27 01:41:43,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 01:41:43,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:43,365 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:43,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:41:43,365 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:43,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:43,366 INFO L82 PathProgramCache]: Analyzing trace with hash -2053277384, now seen corresponding path program 29 times [2020-10-27 01:41:43,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:43,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001714591] [2020-10-27 01:41:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:43,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:44,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:44,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 01:41:44,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:44,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 916 [2020-10-27 01:41:44,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:44,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:41:44,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:44,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 01:41:44,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:45,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:45,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:45,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:45,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:45,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:45,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:45,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:45,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:45,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:45,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:45,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:45,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001714591] [2020-10-27 01:41:45,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:45,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:41:45,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558329335] [2020-10-27 01:41:45,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:41:45,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:45,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:41:45,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:41:45,346 INFO L87 Difference]: Start difference. First operand 103 states and 133 transitions. Second operand 35 states. [2020-10-27 01:41:50,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:50,368 INFO L93 Difference]: Finished difference Result 113 states and 144 transitions. [2020-10-27 01:41:50,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:41:50,369 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 102 [2020-10-27 01:41:50,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:50,370 INFO L225 Difference]: With dead ends: 113 [2020-10-27 01:41:50,371 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 01:41:50,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=197, Invalid=4225, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:41:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 01:41:50,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-27 01:41:50,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 01:41:50,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 137 transitions. [2020-10-27 01:41:50,382 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 137 transitions. Word has length 102 [2020-10-27 01:41:50,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:50,382 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 137 transitions. [2020-10-27 01:41:50,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:41:50,382 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 137 transitions. [2020-10-27 01:41:50,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 01:41:50,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:50,383 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:50,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:41:50,383 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:50,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:50,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2131833930, now seen corresponding path program 30 times [2020-10-27 01:41:50,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:50,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89041554] [2020-10-27 01:41:50,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:50,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:51,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:51,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 01:41:51,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:51,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-10-27 01:41:51,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:51,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:41:51,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:51,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 01:41:51,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:52,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:52,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:52,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:52,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:52,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:52,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:41:52,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:52,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:52,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:52,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:52,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 0 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:52,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89041554] [2020-10-27 01:41:52,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:52,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:41:52,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419468249] [2020-10-27 01:41:52,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:41:52,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:52,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:41:52,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:41:52,554 INFO L87 Difference]: Start difference. First operand 106 states and 137 transitions. Second operand 36 states. [2020-10-27 01:41:57,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:57,876 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2020-10-27 01:41:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:41:57,877 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 105 [2020-10-27 01:41:57,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:57,878 INFO L225 Difference]: With dead ends: 116 [2020-10-27 01:41:57,878 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 01:41:57,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=203, Invalid=4489, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:41:57,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 01:41:57,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-27 01:41:57,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 01:41:57,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 141 transitions. [2020-10-27 01:41:57,889 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 141 transitions. Word has length 105 [2020-10-27 01:41:57,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:57,890 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 141 transitions. [2020-10-27 01:41:57,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:41:57,890 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 141 transitions. [2020-10-27 01:41:57,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 01:41:57,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:57,890 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:57,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:41:57,891 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:57,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:57,891 INFO L82 PathProgramCache]: Analyzing trace with hash -2117613576, now seen corresponding path program 31 times [2020-10-27 01:41:57,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:57,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793506120] [2020-10-27 01:41:57,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:57,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:59,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:59,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 01:41:59,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:59,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1071 [2020-10-27 01:41:59,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:59,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:41:59,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:59,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 01:41:59,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:00,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:00,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:00,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:00,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:00,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:00,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:00,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:00,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:00,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:00,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:00,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:00,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793506120] [2020-10-27 01:42:00,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:00,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:42:00,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565625158] [2020-10-27 01:42:00,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:42:00,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:00,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:42:00,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:42:00,195 INFO L87 Difference]: Start difference. First operand 109 states and 141 transitions. Second operand 37 states. [2020-10-27 01:42:05,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:05,917 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2020-10-27 01:42:05,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:42:05,918 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 108 [2020-10-27 01:42:05,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:05,920 INFO L225 Difference]: With dead ends: 119 [2020-10-27 01:42:05,920 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 01:42:05,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=209, Invalid=4761, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 01:42:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 01:42:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-27 01:42:05,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 01:42:05,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 145 transitions. [2020-10-27 01:42:05,933 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 145 transitions. Word has length 108 [2020-10-27 01:42:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:05,933 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 145 transitions. [2020-10-27 01:42:05,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:42:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 145 transitions. [2020-10-27 01:42:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 01:42:05,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:05,934 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:05,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:42:05,934 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:05,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:05,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1047752074, now seen corresponding path program 32 times [2020-10-27 01:42:05,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:05,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621006668] [2020-10-27 01:42:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:05,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:07,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:07,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 01:42:07,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:07,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1092 [2020-10-27 01:42:07,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:07,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:42:07,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:07,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-27 01:42:07,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:08,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:08,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:08,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:08,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:08,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:08,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:08,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:08,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 0 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:08,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621006668] [2020-10-27 01:42:08,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:08,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:42:08,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511840682] [2020-10-27 01:42:08,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:42:08,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:08,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:42:08,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:42:08,271 INFO L87 Difference]: Start difference. First operand 112 states and 145 transitions. Second operand 38 states. [2020-10-27 01:42:14,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:14,313 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2020-10-27 01:42:14,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:42:14,314 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 111 [2020-10-27 01:42:14,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:14,315 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:42:14,315 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 01:42:14,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=215, Invalid=5041, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:42:14,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 01:42:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-27 01:42:14,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 01:42:14,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 149 transitions. [2020-10-27 01:42:14,329 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 149 transitions. Word has length 111 [2020-10-27 01:42:14,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:14,330 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 149 transitions. [2020-10-27 01:42:14,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:42:14,330 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 149 transitions. [2020-10-27 01:42:14,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 01:42:14,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:14,331 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:14,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:42:14,331 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:14,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:14,331 INFO L82 PathProgramCache]: Analyzing trace with hash 153880248, now seen corresponding path program 33 times [2020-10-27 01:42:14,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:14,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028813572] [2020-10-27 01:42:14,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:14,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:15,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:15,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 01:42:15,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:15,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1196 [2020-10-27 01:42:15,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:15,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:42:15,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:15,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 01:42:15,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:16,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:16,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:16,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:16,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:16,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:16,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:42:16,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:16,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:16,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028813572] [2020-10-27 01:42:16,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:16,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:42:16,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182058065] [2020-10-27 01:42:16,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:42:16,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:16,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:42:16,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:42:16,973 INFO L87 Difference]: Start difference. First operand 115 states and 149 transitions. Second operand 39 states. [2020-10-27 01:42:23,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:23,380 INFO L93 Difference]: Finished difference Result 125 states and 160 transitions. [2020-10-27 01:42:23,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:42:23,382 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 114 [2020-10-27 01:42:23,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:23,383 INFO L225 Difference]: With dead ends: 125 [2020-10-27 01:42:23,384 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 01:42:23,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=221, Invalid=5329, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:42:23,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 01:42:23,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-27 01:42:23,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 01:42:23,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 153 transitions. [2020-10-27 01:42:23,398 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 153 transitions. Word has length 114 [2020-10-27 01:42:23,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:23,398 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 153 transitions. [2020-10-27 01:42:23,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:42:23,398 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 153 transitions. [2020-10-27 01:42:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 01:42:23,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:23,399 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:23,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:42:23,399 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:23,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:23,400 INFO L82 PathProgramCache]: Analyzing trace with hash -384452918, now seen corresponding path program 34 times [2020-10-27 01:42:23,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:23,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150536437] [2020-10-27 01:42:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:23,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:24,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:24,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 01:42:24,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:24,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1375 [2020-10-27 01:42:24,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:24,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:42:24,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:24,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 01:42:24,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:26,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:26,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:26,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:26,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:26,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:26,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:26,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:26,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:26,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:26,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:26,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:26,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150536437] [2020-10-27 01:42:26,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:26,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:42:26,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144138296] [2020-10-27 01:42:26,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:42:26,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:26,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:42:26,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:42:26,221 INFO L87 Difference]: Start difference. First operand 118 states and 153 transitions. Second operand 40 states. [2020-10-27 01:42:33,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:33,014 INFO L93 Difference]: Finished difference Result 128 states and 164 transitions. [2020-10-27 01:42:33,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:42:33,015 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 117 [2020-10-27 01:42:33,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:33,017 INFO L225 Difference]: With dead ends: 128 [2020-10-27 01:42:33,017 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 01:42:33,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=227, Invalid=5625, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:42:33,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 01:42:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-27 01:42:33,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 01:42:33,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 157 transitions. [2020-10-27 01:42:33,032 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 157 transitions. Word has length 117 [2020-10-27 01:42:33,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:33,033 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 157 transitions. [2020-10-27 01:42:33,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:42:33,033 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 157 transitions. [2020-10-27 01:42:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 01:42:33,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:33,034 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:33,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:42:33,034 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:33,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:33,034 INFO L82 PathProgramCache]: Analyzing trace with hash -459917960, now seen corresponding path program 35 times [2020-10-27 01:42:33,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:33,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027353006] [2020-10-27 01:42:33,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:33,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:34,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:34,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 01:42:34,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:34,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1541 [2020-10-27 01:42:34,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:34,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:42:34,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:34,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 01:42:34,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:36,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:36,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:36,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:36,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:36,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:36,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:42:36,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:36,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:36,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:36,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027353006] [2020-10-27 01:42:36,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:36,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:42:36,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806534343] [2020-10-27 01:42:36,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:42:36,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:36,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:42:36,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:42:36,099 INFO L87 Difference]: Start difference. First operand 121 states and 157 transitions. Second operand 41 states. [2020-10-27 01:42:43,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:43,269 INFO L93 Difference]: Finished difference Result 131 states and 168 transitions. [2020-10-27 01:42:43,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:42:43,270 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 120 [2020-10-27 01:42:43,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:43,272 INFO L225 Difference]: With dead ends: 131 [2020-10-27 01:42:43,272 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 01:42:43,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=233, Invalid=5929, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 01:42:43,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 01:42:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-27 01:42:43,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 01:42:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 161 transitions. [2020-10-27 01:42:43,287 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 161 transitions. Word has length 120 [2020-10-27 01:42:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:43,288 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 161 transitions. [2020-10-27 01:42:43,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:42:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 161 transitions. [2020-10-27 01:42:43,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 01:42:43,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:43,289 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:43,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:42:43,289 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:43,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:43,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1923878922, now seen corresponding path program 36 times [2020-10-27 01:42:43,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:43,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100744012] [2020-10-27 01:42:43,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:43,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:44,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:44,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 01:42:44,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:44,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1426 [2020-10-27 01:42:44,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:44,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:42:44,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:44,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-27 01:42:44,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:46,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:46,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:46,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:46,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:46,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:46,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:42:46,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:46,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:46,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:46,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:46,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:46,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100744012] [2020-10-27 01:42:46,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:46,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:42:46,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878218544] [2020-10-27 01:42:46,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:42:46,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:46,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:42:46,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:42:46,326 INFO L87 Difference]: Start difference. First operand 124 states and 161 transitions. Second operand 42 states. [2020-10-27 01:42:53,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:53,915 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2020-10-27 01:42:53,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:42:53,916 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 123 [2020-10-27 01:42:53,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:53,917 INFO L225 Difference]: With dead ends: 134 [2020-10-27 01:42:53,917 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 01:42:53,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=239, Invalid=6241, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:42:53,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 01:42:53,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-27 01:42:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 01:42:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2020-10-27 01:42:53,934 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 123 [2020-10-27 01:42:53,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:53,934 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2020-10-27 01:42:53,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:42:53,935 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2020-10-27 01:42:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-27 01:42:53,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:53,935 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:53,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:42:53,936 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:53,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:53,936 INFO L82 PathProgramCache]: Analyzing trace with hash 332551224, now seen corresponding path program 37 times [2020-10-27 01:42:53,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:53,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233450537] [2020-10-27 01:42:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:53,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:55,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:55,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 01:42:55,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:55,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1489 [2020-10-27 01:42:55,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:55,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:42:55,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:55,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-27 01:42:55,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:57,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:57,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:57,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:57,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:57,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:57,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:57,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:57,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:57,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:57,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:57,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:57,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233450537] [2020-10-27 01:42:57,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:57,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:42:57,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040722041] [2020-10-27 01:42:57,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:42:57,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:57,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:42:57,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:42:57,125 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand 43 states. [2020-10-27 01:43:05,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:05,030 INFO L93 Difference]: Finished difference Result 137 states and 176 transitions. [2020-10-27 01:43:05,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:43:05,031 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 126 [2020-10-27 01:43:05,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:05,033 INFO L225 Difference]: With dead ends: 137 [2020-10-27 01:43:05,033 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 01:43:05,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=245, Invalid=6561, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 01:43:05,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 01:43:05,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-27 01:43:05,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 01:43:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 169 transitions. [2020-10-27 01:43:05,047 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 169 transitions. Word has length 126 [2020-10-27 01:43:05,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:05,048 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 169 transitions. [2020-10-27 01:43:05,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:43:05,048 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 169 transitions. [2020-10-27 01:43:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 01:43:05,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:05,049 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:05,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:43:05,049 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:05,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:05,050 INFO L82 PathProgramCache]: Analyzing trace with hash 938113354, now seen corresponding path program 38 times [2020-10-27 01:43:05,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:05,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57305569] [2020-10-27 01:43:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:05,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:06,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:06,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 01:43:06,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:06,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1590 [2020-10-27 01:43:06,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:43:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-27 01:43:06,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:08,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:08,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:08,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:08,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:08,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:08,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:43:08,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:08,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:08,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:08,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:08,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 0 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:08,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57305569] [2020-10-27 01:43:08,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:08,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:43:08,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070659006] [2020-10-27 01:43:08,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:43:08,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:08,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:43:08,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:43:08,447 INFO L87 Difference]: Start difference. First operand 130 states and 169 transitions. Second operand 44 states. [2020-10-27 01:43:16,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:16,815 INFO L93 Difference]: Finished difference Result 140 states and 180 transitions. [2020-10-27 01:43:16,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:43:16,816 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 129 [2020-10-27 01:43:16,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:16,817 INFO L225 Difference]: With dead ends: 140 [2020-10-27 01:43:16,818 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 01:43:16,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=251, Invalid=6889, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:43:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 01:43:16,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-27 01:43:16,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 01:43:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2020-10-27 01:43:16,835 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 129 [2020-10-27 01:43:16,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:16,836 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2020-10-27 01:43:16,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:43:16,836 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2020-10-27 01:43:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-27 01:43:16,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:16,837 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:16,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:43:16,837 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:16,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:16,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1918082312, now seen corresponding path program 39 times [2020-10-27 01:43:16,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:16,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338167149] [2020-10-27 01:43:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:16,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:18,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:18,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 01:43:18,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:18,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1614 [2020-10-27 01:43:18,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:18,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:43:18,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:18,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-27 01:43:18,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:20,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:20,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:20,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:20,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:20,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:20,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:43:20,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:20,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:20,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:20,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:20,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:20,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338167149] [2020-10-27 01:43:20,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:20,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:43:20,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137465024] [2020-10-27 01:43:20,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:43:20,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:20,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:43:20,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:43:20,417 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand 45 states. [2020-10-27 01:43:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:29,175 INFO L93 Difference]: Finished difference Result 143 states and 184 transitions. [2020-10-27 01:43:29,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:43:29,176 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 132 [2020-10-27 01:43:29,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:29,178 INFO L225 Difference]: With dead ends: 143 [2020-10-27 01:43:29,178 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 01:43:29,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=257, Invalid=7225, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 01:43:29,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 01:43:29,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-27 01:43:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 01:43:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 177 transitions. [2020-10-27 01:43:29,195 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 177 transitions. Word has length 132 [2020-10-27 01:43:29,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:29,195 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 177 transitions. [2020-10-27 01:43:29,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:43:29,195 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 177 transitions. [2020-10-27 01:43:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 01:43:29,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:29,196 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:29,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:43:29,197 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:29,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:29,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1048900234, now seen corresponding path program 40 times [2020-10-27 01:43:29,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:29,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508669410] [2020-10-27 01:43:29,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:29,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:31,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:31,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 01:43:31,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:31,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1910 [2020-10-27 01:43:31,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:31,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:43:31,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:31,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-27 01:43:31,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:33,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:33,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:33,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:33,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:33,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:33,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:33,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:33,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 0 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:33,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508669410] [2020-10-27 01:43:33,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:33,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:43:33,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761161568] [2020-10-27 01:43:33,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:43:33,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:33,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:43:33,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:43:33,133 INFO L87 Difference]: Start difference. First operand 136 states and 177 transitions. Second operand 46 states. [2020-10-27 01:43:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:42,436 INFO L93 Difference]: Finished difference Result 146 states and 188 transitions. [2020-10-27 01:43:42,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:43:42,437 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 135 [2020-10-27 01:43:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:42,439 INFO L225 Difference]: With dead ends: 146 [2020-10-27 01:43:42,439 INFO L226 Difference]: Without dead ends: 139 [2020-10-27 01:43:42,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=263, Invalid=7569, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:43:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-27 01:43:42,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-10-27 01:43:42,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-27 01:43:42,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 181 transitions. [2020-10-27 01:43:42,457 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 181 transitions. Word has length 135 [2020-10-27 01:43:42,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:42,458 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 181 transitions. [2020-10-27 01:43:42,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:43:42,458 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 181 transitions. [2020-10-27 01:43:42,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-27 01:43:42,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:42,459 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:42,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:43:42,459 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:42,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:42,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1023560, now seen corresponding path program 41 times [2020-10-27 01:43:42,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:42,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478962702] [2020-10-27 01:43:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:42,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:44,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:44,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 01:43:44,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:44,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2020 [2020-10-27 01:43:44,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:44,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:43:44,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:44,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-27 01:43:44,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:46,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:46,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:46,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:46,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:46,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:46,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:46,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:46,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:46,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:46,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:46,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:46,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478962702] [2020-10-27 01:43:46,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:46,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 01:43:46,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218219436] [2020-10-27 01:43:46,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 01:43:46,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:46,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 01:43:46,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:43:46,609 INFO L87 Difference]: Start difference. First operand 139 states and 181 transitions. Second operand 47 states. [2020-10-27 01:43:56,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:56,372 INFO L93 Difference]: Finished difference Result 149 states and 192 transitions. [2020-10-27 01:43:56,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 01:43:56,373 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 138 [2020-10-27 01:43:56,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:56,375 INFO L225 Difference]: With dead ends: 149 [2020-10-27 01:43:56,375 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 01:43:56,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=269, Invalid=7921, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 01:43:56,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 01:43:56,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-27 01:43:56,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 01:43:56,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 185 transitions. [2020-10-27 01:43:56,392 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 185 transitions. Word has length 138 [2020-10-27 01:43:56,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:56,392 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 185 transitions. [2020-10-27 01:43:56,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 01:43:56,392 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 185 transitions. [2020-10-27 01:43:56,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 01:43:56,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:56,393 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:56,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:43:56,393 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:56,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:56,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1966046154, now seen corresponding path program 42 times [2020-10-27 01:43:56,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:56,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994207734] [2020-10-27 01:43:56,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:56,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:58,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:58,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 01:43:58,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:58,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1914 [2020-10-27 01:43:58,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:58,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 01:43:58,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:58,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-27 01:43:58,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:00,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:00,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:00,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:00,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:00,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:00,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:00,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:00,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:00,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:00,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:00,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 0 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:44:00,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994207734] [2020-10-27 01:44:00,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:00,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 01:44:00,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67890581] [2020-10-27 01:44:00,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 01:44:00,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:00,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 01:44:00,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:44:00,546 INFO L87 Difference]: Start difference. First operand 142 states and 185 transitions. Second operand 48 states.